IMAGE  EVALUATION 
TEST  TARGET  (MT-3) 


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Hiotographic 

Sdences 

Corporation 


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33  WEST  MAIN  STREET 

WEBSTER,  NY.  14580 

(716)  d72-4503 


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CIHM/ICMH 

Microfiche 

Series. 


CIHM/ICMH 
Collection  de 
microfiches. 


Canadian  Institute  for  Historical  Microreproductions  /  Institut  Canadian  de  microreproductions  historiques 


Technical  and  Bibliographic  Notaa/Notae  tachniquaa  at  bibliographiquaa 


The 
to  tl 


The  inatitute  haa  attempted  to  obtain  the  beat 
original  copy  available  for  filming.  Featurea  of  thia 
copy  which  may  be  biblio  graphically  unique, 
which  may  alter  any  of  the  Imagea  in  the 
reproduction,  or  which  may  aignificantly  change 
the  usual  method  of  filming,  are  checked  below. 


Coloured  covers/ 
Couverture  de  couleur 


I      I    Covers  damaged/ 


D 

El 


D 


Couverture  endommag6e 

Covers  restored  and/or  laminated/ 
Couverture  restaurie  et/ou  paliiculte 

Cover  title  missing/ 

Le  titre  de  couverture  manque 

Coloured  maps/ 

Cartes  giographiquas  en  couleur 

Coloured  ink  (i.e.  other  than  blue  or  black)/ 
Encre  de  couleur  (i.e  autre  que  bleue  ou  noire) 


I      I   Coloured  plates  and/or  illustrations/ 


n 


Planches  et/ou  illustrations  en  couleur 


Bound  with  other  material/ 
Reli6  avec  d'autres  documents 


Tight  binding  may  cause  shadows  or  distortion 
along  interior  margin/ 

La  reliure  serr6e  peut  causer  de  I'ombre  ou  de  la 
distortion  le  long  de  la  marge  IntArieure 

Blank  leaves  addctd  during  restoration  may 
appear  within  the  text.  Whenever  possible,  these 
have  been  omitted  from  filming/ 
11  sa  peut  que  certaines  pages  blanches  ajoutias 
lors  d'une  restauratlon  apparaissent  dans  le  texte, 
mais.  iorsque  cela  itait  possible,  ces  pagea  n'ont 
pas  AtA  filmies. 

Additional  comments:/ 
Commentaires  supplimentaires; 


L'institut  a  microf  llmA  le  meilleur  exemplaire 
au'il  lul  a  4^4  poaalble  de  ae  ptocurer.  Lea  ditaiia 
de  cet  exemplaire  qui  aont  paut-Atre  uniquea  du 
point  de  vue  bibliographique,  qui  peuvent  modifier 
une  image  reproduite,  ou  qui  peuvent  exiger  une 
modification  dana  la  mAthode  normaie  de  filmage 
aont  indiqute  ci-deaaoua. 


|~n   Coloured  pages/ 


D 


Pages  de  couleur 

Peges  damaged/ 
Pages  endommagAea 

Pagea  restored  and/oi 

Pages  restaur^as  et/ou  pellicultes 

Pages  discoloured,  stained  or  foxe< 
Pagea  dicoiortea,  tachattea  ou  piquAea 

Pages  detached/ 
Pages  d6tachAes 

Showthroughy 
Tranaparence 

Quality  of  prir 

Qualiti  inAgale  de  I'lmpresslon 

includes  supplementary  materii 
Comprend  du  met6riel  suppltfmentaira 

Only  edition  available/ 
Seule  Edition  disponible 


I     I  Peges  damaged/ 

I      I  Pagea  restored  and/or  laminated/ 

|T71  Pages  discoloured,  stained  or  foxed/ 

I      I  Pages  detached/ 

r^  Showthrough/ 

I      I  Quality  of  print  variea/ 

r~|  includes  supplementary  material/ 

I     I  Only  edition  available/ 


The 
posi 
of  tl 
film 


Oric 

beg 

the 

sior 

oth( 

first 

sior 

oril 


The 
shal 
TINI 
whii 

l\/lar 
diff( 
enti 
begi 
righ 
reqi 
met 


Pages  wholly  or  portiaily  obacured  by  errata 
flipn.  tlistues,  etc.,  have  been  ref limed  to 
ensure  the  best  possible  image/ 
Lea  pages  totslement  ou  partiellement 
obacurcies  par  un  feuillet  d'errete,  une  pelure, 
etc.,  ont  M  filmtes  A  nouveau  de  fapon  A 
obtenir  la  meilleure  image  possible. 


This  item  is  filmed  at  the  reduction  ratio  checked  below/ 

Ce  document  est  film*  au  taux  de  reduction  indiqu*  ci-dessous. 

10X  14X  18X  22X 


7 


26X 


XX 


12X 


16X 


20X 


24X 


28X 


32X 


The  copy  filmed  here  has  been  reproduced  thanks 
to  the  generosity  of: 

Library, 

National  Museums  of  Canada 


L'exemplaire  fiimA  fut  reproduit  grAce  A  la 
ginArosit*  de: 

Bibliothdque 

IMusAes  Nationaux  du  Canada 


The  images  appearing  here  are  the  best  quality 
possible  considering  the  condition  ai.d  legibility 
of  the  original  copy  and  in  Iceeping  with  the 
filming  contract  specifications. 


Original  copies  in  printed  paper  covers  are  filmed 
begin'iing  with  the  front  cover  and  ending  on 
the  iest  page  with  a  printed  or  illustrated  impres- 
sion, or  the  bacit  cover  when  appropriate.  All 
other  original  copies  are  filmed  beginning  on  the 
first  page  with  a  printed  or  illustrated  impres- 
sion, and  ending  on  the  last  page  with  a  printed 
or  illustrated  impression. 


Les  images  suivantes  ont  At6  reproduites  avec  le 
plus  grand  soin,  compte  tenu  de  la  condition  et 
de  la  nettet*  de  l'exemplaire  film*,  et  en 
conformity  avec  les  conditions  du  contrat  de 
filmage. 

Les  exemplaires  originaux  dont  la  couverture  en 
papier  est  imprimte  sont  filmte  en  commenpant 
par  le  premier  plat  et  en  terminant  soit  par  la 
derniire  page  qui  comporte  une  empreinte 
d'impression  ou  d'illustration,  soit  par  le  second 
plat,  salon  le  cas.  Tous  les  autres  oxemplaires 
originaux  sont  filmte  en  commen^ant  par  la 
premiere  page  qui  comporte  une  empreinte 
d'impression  ou  d'illustration  et  en  terminant  par 
la  dernlAre  page  qui  comporte  une  telle 
empreinte. 


The  last  recorded  frame  on  each  microfiche 
shall  contain  the  symbol  — »-  (meaning  "CON- 
TINUED"), or  the  symbol  y  (meaning  "END"), 
whichever  applies. 


Un  des  symboles  suivants  apparaftra  sur  ia 
dernidre  image  de  cheque  microfiche,  selon  le 
cas:  le  symbole  — ►  signifie  "A  SUIVRE".  le 
symbole  V  signifie  "FIN". 


Maps,  plates,  charts,  etc..  may  be  filmed  at 
different  reduction  ratios.  Those  too  large  to  be 
entirely  included  in  one  expofture  ar^i  filmed 
beginning  in  the  upper  left  hand  c  rner.  left  to 
right  and  top  to  bottom,  as  many  frames  as 
required.  The  following  diagrams  illustrate  the 
method: 


Les  cartes,  planches,  tableaux,  etc.,  peuvent  Atre 
filmAs  A  des  taux  de  reduction  diffdrents. 
Lorsque  le  document  est  trop  grand  pour  Atre 
reproduit  en  un  seul  clichA,  il  est  film*  A  partir 
de  I'angle  supArieur  gauche,  de  gauche  A  droite, 
et  de  haut  en  bas.  en  prenant  le  nombre 
d'images  nAcessaire.  Les  diagrammes  suivants 
illustrent  la  mAthode. 


1 

2 

3 

i  i^ 


1 

2 

3 

4 

5 

6 

^epartinciit    of  ilvc    ^nietiov: 

U.  S.  NATIONAL  MUSEUM. 


BULLETIN 


OP  THK 


UNITED  STATES  NATIONAL  MUSEUM. 


]Sro.    81. 


SYNdPSIS  or  THK  NORTH  AMERICAN  SYKPHID/f!. 


BY 


SAMUEL  W.  WILLISTON,  M.  D,  FH.  D. /^>:?^^^^'^^   ; 


WASniNGTOK: 

GOVKKNMKNT    PUIM"IN(}    OFI'IOE. 
1886. 


/OOBf 


p*^ 


l(ii^p»PBpp.j»iiwii...Ji.niw«iwii|i/gi^,._^ 


'AJ: 


vn73 


I^V 


A.>C><_/V-Ay 


? 

'^•. 


us 


^eparimeni   of  ihc   ^ni«rior: 

U.  S.  NATIONAL  MUSEUM.  ^"^•""-'t^l  HOARD  OF  CANADA 

>^iLAN-.lt8:010.:,l>;rt,    r,TAiio^ 

Serial  Number  41  '    '  ^' 


BULLETIlSr 


OF  TEE 


UNITED  STATES  NATIONAL  MUSEUM. 


IsTo.    31. 


PUBLISHED  UNDER  THE  DIRECTION  OF  THE  8UITHS0NIAN  INSHTUm)!. 


WASHINGTON: 
OOVEENMENT  PRINTING  OFFIOB. 

1886. 


w>, 


/^63S 


0( 


C^^ 


^>^. 


O-^^' 


iK'^^ 


ADVERTISEMENT. 


This  work  (fiulletii)  No.  31)  is  the  forty -first  of  a  series  of  papers  in- 
tended to  illustrate  the  collections  of  natural  history  and  ethnology 
belonging  to  the  United  States,  and  constituting  the  National  Museum, 
of  \f  hich  the  Smithsonian  Institution  was  placed  in  charge  by  the  act  of 
Congress  of  August  10,  1846. 

It  has  been  prepared  at  the  request  of  the  Institution,  and  printed 
by  authority  of  the  honorable  Secretary  of  the  Interior. 

The  publications  of  the  National  Museum  consist  of  two  series — the 
Bulletins,  of  which  this  is  No.  31,  in  continuous  series,  and  the  Proceed- 
ings, of  which  the  ninth  volume  is  now  in  press. 

The  volumes  of  Proceedings  are  printed,  signature  by  signature,  each 
issue  having  its  own  date,  and  a  smal'  edition  of  each  signature  is  dis- 
tributed to  libraries  promptly  after  its  publication. 

From  time  to  time  the  publications  of  the  Museum  which  have  been 
issued  separately  are  combined  together  and  issued  as  volumes  of  the 
Miscellaneous  Collections.  These  are  struck  off  from  the  stereotype 
pliites  from  which  the  first  edition  was  printed,  and  in  this  form  are 
distributed  by  the  Smithsonian  Institution  to  librsiries  and  scientific 
societies  throughout  the  world.  Volume  13  of  these  collections  includes 
Bulletins  1  to  10,  inclusive;  volume  19,  volumes  1  and  2  of  the  Proceed- 
ings; volume  22,  volumes  3  and  4  of  the  Proceedings;  and  volume  23, 
Bulletins  11  to  15,  inclusive. 

Full  lists  of  the  publications  of  the  Museum  may  be  found  in  the  cur- 
rent catalogues  of  the  publications  of  the  Smithsonian  Institution. 

SPENCER  F.  BAIRD, 
Secretary  of  the  Smithsonian  Institution. 

Smithsonian  Institution, 

Washington,  July  23, 1886. 
tt 


DBPARTMl' NT  OF  THE  INTERIOE: 

U.  8.  NATIONAL  MUSEUM. 


BULLETIN 


OK    THK 


UNITED  STATES  NATIONAL  MUSEUM. 


No.   31. 


SYNOPSIS  OF  THE  NORTH  AMERICAN  SYRPHIDI 


BY 


SAMUEL  W.  WILLISTON,  M.  D.,  Ph.  D. 


WITH  TWELVE  PLATES. 


WASHINGTON: 

GOVERNMEXT   PRINTING  OPPIOB. 
1  .S86. 


■•» 


I  liav( 
nay  (lipt( 
part  of 
howevei 
friends  y 
ciatiujf  ; 
pecially 
nished  u 
I  found 
of  Phila 
thing  I  ( 
Washiuf 
eluding  1 
lett,  of  I 
and  Dr. 
species  o 


PREFACE. 


i 


5 


That  which  has  been  aimed  at  iu  the  present  Synopsis  is  the  descrip- 
tion, as  fnll  and  complete  as  possible,  of  the  North  American  SyrphidtB. 
The  labor  involved  in  the  determination  of  our  diptera,  save  such  as 
have  been  described  or  monographed  by  Dr.  Loew  and  Baron  (Jsteu 
Sacken,  is  very  great,  owing  to  the  cftou  incomplete  and  unsatisfactory 
descriptions  scattered  through  tlie  literature  of  a  half  dozen  languages. 
To  bring  together  deficriptious  in  such  a  way  as  will  render  the  identi- 
fication of  our  numerous  species  less  toilsome  and  more  certain.  Is  the 
only  means  that  will  now  materially  further  the  study  of  American 
diptera ;  the  description  of  desultory  new  species  is  detrimental  to  real 
progress  in  the  knowledge  of  our  fauna.  My  aim  has  been  the  study 
of  genera  and  species,  to  so  describe  and  figure  those  of  the  United 
States  as  to  render  them  more  easily  determinable.  With  every  page  I 
write  I  feel  more  fully  how  difficult  descriptive  dipterology  really  is,  and 
that  only  a  beginning  has  been  made  in  the  study  of  this  interesting 
family.  But  the  work  will,  I  trust,  serve  a  useful  purpose  in  pointing 
out  what  the  needs  and  necessities  are,  and  to  pave  tlie  way  for  a  future 
exhaustive  monograph  of  the  family,  based  upon  a  wider  knowIe<lge  thau 
is  now  possible. 

I  have  given  especial  attention  to  this  family  since  the  beginning  of 
my  dipterological  studies  eight  years  ago,  and  have  collected  a  large 
part  of  the  species,  either  iu  New  England  or  the  West.  I  could  not, 
however,  have  accomplished  what  I  have,  except  by  the  aid  of  the  many 
friends  who  have  kindly  sent  me  material.  Without  iu  any  way  depre- 
ciating the  favors  of  others,  I  would  express  my  acknowledgments  es- 
pecially to  Prof.  J.  H.  Comstock,  of  Cornell  University,  for  the  ai<l  fur- 
nished me  iuthe  examination  of  a  considerable  collection,  among  which 
I  found  the  very  interesting  genus  Senoffatiter ;  to  Mr.  Eugene  L.  Keen, 
of  Philadelphia,  wjio,  in  the  most  generous  way,  gave  me  freely  every- 
thing I  desired  from  his  industrious  collecting ;  to  Prof.  C.  V.  Ililey,  of 
Washington,  for  the  privilege  of  examining  his  large  collee.tions,  in- 
cluding the  excellent  one  of  Mr.  E.  Burgess;  and  to  Mr.  D.  W.  Coquil- 
lett,  of  Aimheim,  Cal.,  Mr.  Theodore  Pergande,  of  Washington,  D.  C, 
and  Dr.  George  Dimmock,  of  Cambridge,  for  the  addition  of  not  a  few 
species  otherwise  unknown  to  me.    Other  aid  has  been  afforded  me  by 

v 


VI 


BULLETIN   31,    UNITED  STATES  NATIOP^AI.  MUSEUM. 


Prof.  J.  A.  Lintncr,  of  Albany,  Mr.  O.  F.  Oauinor,  of  Now  Mexico, 
and  variouH  otlu'is  whoso  names  will  bo  found  in  tliuir  approi)riate 
places.  To  all  thi'so  1  wouM  express  niy  sincerest  thanks.  Nor  8hould 
I  neglect  to  mention  the  exten.sive  nollections  from  the  West  and  South- 
west obtained  from  Messrs.  H.  K.  Morrison  and  O.  T.  Baron,  and  from 
San  Dominifo,  from  Mr.  (l.  F.  Frazar. 

Other  kind  favors,  which  I  would  K>''*t*'*"".V  acknowledge,  were  re- 
ceived from  I'rof.  II.  A.  ilagen,  of  (Cambridge,  who  kindly  permitted 
me  to  study  for  several  days  in  his  laboratory  the  typ«^  collections  of 
Loew  and  Osteu  fSacken.  My  readers  will  pardon  me  in  the  pride  1  take 
in  stating  that  of  nearly  two  hundred  species  which  1  had  identified 
absolutely  independently  from  descriptions,  I  found  upon  comparisons 
witii  the  types  and  identified  species  in  the  Loew  and  Osten  Sacken  col- 
lection but  three  or  four  discrepanci  s.  I  can  give  no  higher  praise  to 
tln^  work  of  these  two  authors  that  admits  of  such  close  results.  To 
Mr.  8.  li.  Scudder,  mj'  thanks  are  due  for  his  kindness  and  courtesy  in 
permitting  me  to  study  his  (;ollections  of  fossil  diptera  and  drawings. 
To  Prof.  A.  Van  Name,  the  librarian  of  Yale  College,  my  sincere  thanks 
are  also  due  for  his  unfailing  courtesy  and  assistance.  Nor  should  I 
neglect  to  speak  of  the  encouragement  and  assistance  that  have  been 
afforded  me  by  my  wife. 

Of  the  published  writings  on  this  family,  I  have  been  mostly  indebted 
to  those  of  Schiner,  to  whom  the  classifleation  of  the  family  owes  much, 
and  to  the  writings  of  Loew,  Osten  Sacken,  Wiedemann,  and  others, 
wherever  they  were  a<;cessible.  Of  Haron  Osten  Sacken's  work  here, 
as  elsewhere,  1  cannot  speak  in  terms  of  too  great  praise.  His  descrip- 
tions are  clear,  accurate,  and  conscientious;  I  have  never  been  in  doubt 
regaiding  the  correct  identification  of  his  species  in  this  family.  How 
nuu'li  the  present  results  are  owing  to  his  labors  will  be  apparent  to  any 
one  who  will  even  cursorily  examine  the  following  pages.  My  heartiest 
thanks  are  likewise  due  him  for  the  constant  interest  he  has  taken  in  my 
studies,  during  the  years  that  I  have  had  the  pleasure  of  correspond- 
ence with  him.  Of  Loew's  work  T  need  not  speak.  No  better  monu- 
ment to  a  talented,  learned,  and  versatile  man  exists  .  My  where  in  the 
domain  of  dipterological  literature — and  this  field  has  been  cultivated 
by  most  able,  as  well  as  poor  workers — than  in  his  Diptera  GenturisB 
and  Monographs.  Hi  s  Latiii  descriptions  are  models,  and  very  much 
of  the  synonymy  of  the  American  Syrphidte  is  due  to  him.  Nor  should 
I  fail  to  mention  the  conscientious  work  of  Mr.  F.  M.  v.  d.  Wulp,  of 
Holland.  He  has  not  written  a  great  deal  on  North  American  diptera, 
and  that,  unfortunately,  is  mostly  in  the  Dutch  language;  but  what 
he  has  written  makes  one  wish  that  be  had  published  more  on  our  fauna 
in  the  English  language,  which  he  uses  with  fluency.  Mr.  J.  F.  M. 
Bigot,  of  Paris,  has,  with  commendable  zeal  and  industry,  written  much 
on  the  North  American  Syrphidee ;  his  works  may  be  consulted  with 
profit. 


mear 

to  iid 

I         Th 

toget 

the  i 


V  Mexico, 
tpropriate 
for  hIiouUI 
nd  South- 
and  from 

,  were  re- 
permitted 
octioiiH  of 
idu  I  take 
identilied 
nparisons 
iiclven  col- 
praise  to 
111  Its.  To 
)urteay  in 
drawings, 
re  thanks 
'  should  I 
lave  been 


PREFACE. 


VU 


i 


My  work  must  have  shortcomings  and  errors;  the  sabject  is  by  no 
means  an  easy  one.  I  only  ask  t  hat  it  be  accepted  as  an  honest  endeavor 
to  advance  tlio  study  of  tliese  neglected  but  interesting  insects. 

The  types  of  all  but  two  or  three  of  the  new  species  described  by  me, 
together  with  my  entire  eollection  in  this  family,  will  be  preserved  in 
the  National  Museum  for  tuture  reference  and  revision. 

^         ^  8.  W.  WILLI8T0N. 

Yale  Oollkoe,  New  Haybn,  Conn., 

JiMM  1,1886. 


indebted 
res  much, 
d  others, 
ork  here, 
s  descrip- 
1  in  doubt 
ly.  How 
Mit  to  any 
heartiest 
ien  in  my 
rrespond- 
:er  monu- 
ere  in  the 
cultivated 
CenturisB 
ery  much 
or  should 
Wulp,  of 
n  diptera, 
but  what 
Dur  fauna 
J.  F.  M. 
)ten  much 
dtcd  with 


*' 


ilicnido 

Clirj-80t( 

P.aragos 

Niiiisij^iii 

Pipiza  . 

Fsilota  . 

Leprouij 

Chrywoyi 

ChiloHia 

Mola!io8t 

Pyropliu' 

Plafychii 

Li'ucozoi 

Cataltciiii 

Enpeodc! 

SyrpIniH. 

Didea  . . . 

Xanthoyi 

All();j;rap( 

5Iesograii 

S[iha)i()pl 

Pelecocor 

Neoascia 

8phe)j;iiia 

Baccba . . 

Chalcoiiiy 


CONTENTS. 


I'age. 


XV 

XVI 

XVI 

XIX 

XX 

XXI 

XXI 

XXII 

XXII 


XXIII 
XXIV 


XXVI 
XXVI 


Mix  ^'^K®' 

Myiolopta J27 

Kl>iiiS'a 12!> 

Ktigenianiyia l;{0 

Hi'iiohyopa i.ji 

Volucflla IJ4 

t'fipPKtyllllll [rj 

8fii(i(.invia I53 

ArctopLila |r,7 

Eristiilis jra 

Doliosyrpbiis j7^ 

Pteroptila j^g 

Heloiiliilu8 jj^.j 

I'teriillastj's jg^ 

'J'lMtcllocilcilliH jqg 

Mallotu    ^(,1 

Triodduta 205 

Ti(>i»i(lia 4)Qg 

Criorhina 209 

Cyiiorliiiia  212 

Soiniila  2lG 

C'rioprora 217 

^"•^•'f'^ 220 

Bracliypulpus  221 

Xylota  . 
Syiitta  . 

Clirysoclilamys 240 

Meiapioidus 24;{ 

Chilosia ....  OH  i  ^P'>""'yi'' 214 

Molanostoma....';; .«  i  ?!*;!"""'*"""' 249 

pyn.ph..na Z'..'::..:::     ^^"' 

Platychirus  

Lt'ucozoiia 

CatiilKimUa 

Enpeodcvs  ^.^ 

Syri»I»is ,;^j 

Didea 

Xaiithograiiima 

Allonrrapta 

5Iesograpta 

Sphanophoria ^04 

Pelecocora  

Neouscia 

Sphe)j;iiia 

Baccba 


Part  I.— Classification 

Synopti(!  tahlo  of  tribes 

Microdouiiii 

Chilosini 

Melanostoiniiii  

Syrphini  

Pfilecocerini 

Spbegiriini 

Bracbyopini 

Voliicellini 

Sericoinyiiii xxiii 

Ki  stalini  

Xylotini 

Milesini    

Cerini 

Family  cbaracters    

Table  for  tbe  detcriiiiiiation  of  gt 
"•''•a r..xxvu 

Part  II.— Descriptions, 

ilicnidoii ;{ 

Cbrysotoxiim I3 

Paragos 

Naiisij^abler 

Pipiza  


17 
21 
22 


Psilota OQ 

Leprouiyia 

Cbrysogaster 


224 

2;k> 


:!i 


54 
r>(i 
til 

<)2 


89 
91 
96 

98 


110 
111 

ii;j 

IKi 


Chalcoiiiyia 12G 


254 

i  Spbt'coiuy  ia 256 

Ccria 2:.9 

Part  III.— (joxcmsion 

Habits  of  tbo  Syrpbid;^  2m 

^'"■^'"' 270 

Structural  cbaractcrs .>72 

Secondary  sexual  <'baracters 

Geogrupbical  distribution 

(ieologiciil  distribution 281 

Chronologif  a?  list  of  genera 28:J 

Dertnitiou  of  teuns  287 

Appendix 291 

Explanation  of  plntes ;{')4 

Index JJ27 

Plates  I  to  XII :?o,% 


278 


IX 


P^RT    I. 


CLASSIFICATION. 


NORTH  AMERICAN  SYRPHID/E. 


PART  I.-CLASSIFIOATION. 


The  family  of  Syrphicke  is  one  of  the  most  extensive  in  the  order  of 
diptera.  Nearly  or  quite  two  thousand  species  are  known  from  through- 
out the  world,  and  mauy  new  forma  are  constantly  being  added.  They 
contain  among  them  many  of  the  brightest-colored  flies,  and  numerous 
specimens  are  sure  to  appear  in  every  general  collection  of  insects. 
None  are  injurious  in  their  habits  to  man's  economy,  and  many  of  them 
are  very  beneficial.  In  the  following  pages  about  three  hundred 
species  are  described  from  the  region  north  of  Mexico,  so  that  I  trust 
even  the  non-entomological  student,  with  a  little  exertion,  may  be  able 
to  identify  them.  That  there  are  many  more  species  within  these  limits 
is  certain,  e-  necially  in  the  southern  and  western  regions.  From  Europe 
over  live  hui.'lred  and  fifty  species  have  been  catalogued ;  doubtless 
nearly  or  quite  as  many  will  be  eventually  accredited  to  North  America. 

Th<^  family  is  easily  and  exactly  defined ;  with  but  few  exceptions  by 
the  presence  of  the  spurious  vein  of  the  wings  alone ;  in  all,  by  the  etruct- 
ure  of  the  head  and  the  ne  uration.  Its  i)ositiou  in  the  dipterological 
system  is  thus  given  by  Brauer : 

Suborder  CrcLOBUiiAriiA.  ■• 


Section  Atchiza. 


Section  Schizophorida. 


Tribe  Syrphidce. 

(SyrphidcB,  8.  str.,  Pipuneulidm.) 


Tribe  Jlypucera. 
(Phoridce,  Platypezidce.) 


Tribe  Evmidce. 


Tribe  Pupipara. 


Sehizowetopia. 
(Muscidce  ealyptrato!.) 


Holometopia. 
{Mtueidoe  acalyptrata^.) 


While,  as  a  general  rule,  the  ISyrphidw  present  excellent  specific 
characters,  there  is  a  remarkable  dearth  of  generic  or  group  characters. 
The  richness  in  species,  the  many  intermediate  forms,  the  absence  of 
marked  plastic  variations,  all  tend  to  make  the  family  in  its  subdivis- 
ions an  exceedingly  difficult  one  to  define  with  clearness.  From  this 
fusion  or  coalescence  of  gener-',  we  are  often  compelled  to  base  our  classi- 
fication upon  what  appear  very  trivial  ditfereuces.  Species  n)ust  be 
grouped  together  that  show  natural  relationships,  drawing  the  divid- 
ing lines  where  the  largest  intervals  occur.    Their  classification  ulti- 

xux 


XIV 


BULLETIN  31,    UNITED  STATES  NATIONAL  MUSEUM. 


mately  mast  in  many  cases  depend  largely  upon  convenience,  and  the 
views  of  those  best  qualified  to  interpret  natural  characters.  Not  sel- 
dom these  vie'va  will  rest,  more  or  less,  upon  an  indefinable  totit  ensem- 
ble, the  instinctive  or  natural  grouping  of  the  trained  eye  and  mind. 
There  are  no  generic  and  specific  Huiitat'ons  in  nature ;  this  fact,  tlianks 
to  modern  philosophy,  we  have  nearly  all  learned.  But  by  no  means 
does  it  follow  thai,  there  is  no  such  thing  as  classification.  A  hor.se  and 
an  ass  might  show  all  possible  intermediate  characters,  so  that  one  could 
not  say  when  the  horse  put  off  the  caballine  and  took  on  the  asinine 
nature;  but  nevertheless  the  hor.se  is  still  a  horse  and  the  ass  an  ass ; 
the  only  vexatious  question  would  be  when  and  where  to  label  the  one 
eahallus  and  the  other  aainus.  So,  indeed,  does  the  question  come  home 
pertinently  in  the  small  fragment  of  zoological  life  treated  in  the  follow- 
ing pages.  With  a  knowledge  of  but  few  species,  classification  was  not 
diflficult,  and  definition  easy,  but  with  the  discovery  of  numerous  and 
nuiltifarious  forms  generic  bands  become  stretched  and  thinned  till  at 
last  they  are  rent  asunder,  and  nothing  is  left  but  individual  coherence. 
Even  a  novice  v^ould  be  astonished  at  the  proposition  to  unite  a  Chrym- 
gaster  nitiHa  and  a  Syrphus  lap2)onicns  in  the  same  genus,  yet  the  chain 
between  them  is  complete :  nowhere  do  dift'erences  exist  that  can  be  ac- 
credited with  more  than  specific  valuation.  Nor  is  this  a  solitary  in- 
instance;  the  majority  of  genera  in  the  family  do  not  admit  of  true  generic 
definition ;  the  best  that  we  can  (U)  is  to  point  out  where  one  shall  end 
and  the  other  begin,  a  proceeding  which  sometimes  {Helophilua,  for  iu- 
star.ce)  entails  the  result  that  a  species  differs  more  from  some  of  its 
own  associates  than  it  does  from  members  of  other  genera.  What,  then, 
are  we  to  do?  Make  a  genus  for  every  difference?  As  well  abandon 
species.  Make  only  genera  that  can  be  limited  by  generic  characters  t 
As  well  abandon  the  family.  In  steering  clear  of  Scylla  we  may  be 
engulfed  in  Oharybdis. 

No  characters  offer  for  the  accurate  or  even  clear  separation  into  sub- 
families. The  best  general  division  that  we  have  was  that  proposed  by 
the  erudite  iSchiner,  based  upon  the  position  of  the  anterior  cross-vein. 
Though,  like  iP'j:,t  of  the  higher  characters  in  this  family,  it  admits  of 
no  sh^rp  definition,  nor  dispels  doubt  in  many  cases,  it  is  unquestion- 
ably a  natural  one.  In  no  case  can  a  si)ecies  with  a  well  marked,  oblique, 
and  exterior  cross-vein  be  placed  among  those  with  an  internal  and 
rectangular  one,  yet  in  not  a  few  we  cannot  easily  deci<le  to  which  of 
the  divisions  a  given  species  belongs.  In  the  following  classification 
I  have  recognized  fourteen  groups,  not  because  they  are  clearly  defined, 
for  but  very  few  are,  but  because  some  grouping  is  absolutely  necessary. 
It  has  been  criticised  as  in  some  respects  artificial ;  this  I  by  no  means 
deny,  in  the  sense  that  they  cannot  be  separated,  except  upon  ulti- 
mately trivial  distinctions,  but  that  they  are  in  the  main  a  natural 
groupin;;  I  do  most  earnestly. contend.  A  faunistic  classification  is  con- 
fessedly imperfect,  though,  as  in  the  case  of  Osten  Sacken's  Tipnlidae, 


SYNOPSIS  OP  NOBTH   AMERICAN   SYRFHID^. 


XV 


I,  and  the 
Not  sel- 
>ut  ensem- 
Lid  mind. 
it,  thanks 
10  means 
loi'se  and 
3110  could 
e  asinine 
8  an  ass ; 
!l  the  one  * 
juie  iiome 
[le  follow- 
Q  was  not 
irons  and 
led  till  at 
oherence. 
a  Chryno- 
the  chain 
can  be  ac- 
•litary  in- 
Lie  generic 
shall  end 
us,  for  in- 
>me  of  its 
hat,  then, 
abandon 
aracters  f 
3  may  be 

into  sub- 
»posed  by 
ross-vein. 
idmits  of 
question- 
,  oblique, 
rnal  and 
which  of 
sitication 
y defined, 
ecessary. 
Qo  means 
pon  ulti- 
natural 
oh  is  con- 
ripnlidsB, 


1 


a  limited  classification  may  happily  admit  of  a  far  wider  application.  In 
such  a  family  as  the  Syrphidoi  many  disturbing  elements  must  naturally 
intrude  themselves  with  the  ingress  of  new  forms;  but  the  knowledge 
of  the  world's  fauna  can  only  be  obtained  from  the  assimilation  of  more 
or  less  heterogeneous  parts  into  one  homogeneous  whole.  My  autoptic 
knowledge  of  genera  is  almost  exctlu.sively  confined  to  the  European  and 
North  American  forms,  types  of  nearly  all  of  which  I  have  examined. 

SYNOPTIC  TAULK   OK   TKIBKS. 

.  Anterior  cross- vein  of  tlu'  wings  distinctly  before  tlie  middle  of  the  discal  cell, 
usually  nearly  rectangular;  third  longitudinal  vein  rarely  with  a 
distinct  curvature  into  the  first  posterior  cell ;  hind  femora  rarely 
thickened.    Usually  smaller,  more  delicate  species,  generally  thinly 

pilose SYRPHINiE. 

b.  Third  joint  of  the  antennte  with  a  thickened  styliforra  arista  or  style. 

Pelecocerini. 
bb.  Antenna)  with  a  dorsal  bristle. 

0.  Third  joint  of  the  antennae  not  both  elongate  and  with  a  strongly  plumose 
arista ;  marginal  cell  open. 

d.  Antennio  longer  than  the  head,  rather  large  species Microdomm. 

dd.  Antennte  not  longer  than  the  head. 
«.  Front  long,  inuch  narrowed  above  in  the  female,  cheeks  narrow,  face  considera- 
bly narrowed  below,  abdomen  frequently  contracted  beyond  the 

base,  more  or  less  slender Baccuini. 

«0.  Face  not  remarkably  narrowed  below. 

/.  Epistoma  projecting,  face  without  tubercle;  abdomen  contracted  toward  the 
base,  in  outline  more  or  less  club-shaped ;  small  specieB. 

Sphkginini. 
ff.  Not  such  species. 

g.  Color  chiefly  reddish  or  lutescent Brachyopini. 

gg.  Color  not  chiefly  reddish  or  Intescent. 

h.  Metallic  green,  metallic  green  and  black,  or  black  species,  rarely  with  luteous 
markings  at  base  of  abdomen,  and  on  the  humeri  and  face ;  abdo- 
men never  with  entire  shining  cross-bauds Chilosini. 

hh.  Black  or  greenish  black  species  with  yellow  or  yellowish  stripes  and  bunds,  or  at 
lenst  with  entire  shining  croiss-bands  on  abdomen. 

i.  Face  black Melanostomini. 

«.  Face  partly  or  wholly  yellow Syupiiini. 

cc.  Third  joint  of  antenntB  elongate,  with  a  strongly  plumose  arista ;  marginal  cell 

usually  closed ;  thick-set  species Volucellini. 

aa.  Anterior  cross- vein  near  or  beyond  the  middle  of  the  discal  cell,  usually  oblique; 
hind  femora  frequently  thickened.  Usually  larger,  robust,  pilose 
specie  3. 

;.  Antenna)  with  a  dorsal  bristle ERISTALIN.^. 

fc.  Third  longitudinal  vein  bent  deeply  into  the  (irst  po.sterior  cell Eristalini. 

kk.  Third  longitudinal  vein  only  gently  curved  or  straight. 
{.  Arista  plumose. 

m.  Third  joint  of  antennic  elongated Volucellini. 

mm.  Third  joint  of  autenniM  siibquadratti;  marginal  cell  open Sericomyini. 

II.  Arista  bare  or  pubescent. 

«.  Thorax  with  distinct  yellow  markings Milesini. 

n«.  Thorax  without  yellow  markings Xylotini. 

jj.  Antennte  with  a  terminal  style CERIN.fi. 


XVI 


BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 


MICRODONINt. 

Anterior  croasvein  near  the  base  of  the  discal  cell,  or  war  the  middle^  and 
more  or  lens  oblique.  Marginal  cell  open.  Legs  slender,  third  joint  of  the 
antenna,  at  least,  elongate,  the  first  more  or  lens  so.     Large,  species. 

a.  Face  rouiiiled,  piloHe, 

h.  FitHt  poHtorior  coil  witJj  a  stump  of  a  vein  from  X\w  tliird  lon^fitudiiial  vein ; 

Hcuteiluni  flattened,  UHuallj  with  two  jwintM Micijodon. 

hb.  First  posterior  vein  without  such  a  Htninp  of  a  vein;  Hciitelliiui  'vithoiit  points. 

M1XOGA8TKK. 
€M,  Face  ]»ro<lnced  downwards,  hare Chkyhotoxum. 

This  group  as  here  distinguished  is  ariifiuial.  Mierodon  is  one  of  the 
most  peculiar  genera  in  the  faniily.  The  presence  of  a  stump  of  a  vein 
iu  the  lirst  posterior  cell  is  characteristic,  reappearing  in  Ceria,  and 
occasionally  in  species  allied  to  Eristalis.  The  presence  of  points  on 
the  scutellum  reminds  one  of  the  IStratiomyida',  but  the  resemblance  is 
not  great.  This  character  was  used  by  Wiedemann  to  found  the  genus 
Ceratophya,  but  it  is  of  slight  importance,  two  such  closely  allied  species 
as  M.  globosus  and  M.  fuscipennis  differing  in  its  presence.  Mixognster 
doubtless  finds  a  place  here,  notwithstanding  its  clubsha])ed  abdomen, 
by  reason  of  the  structure  of  the  head  and  wings.  The  European 
Psarus  likewise  evidently  finds  its  nearest  reltitionship  here,  though 
showing  an  afiiuity  with  Paragus  of  the  next  group. 

Ghrysotoxum  is  more  aberrant,  and  is  a  disturbing  element  in  the 
arrangement  of  the  genera.  The  only  thing  it  has  iu  common  with 
Mierodon  is  the  elongate  autennie ;  the  neuration  approaches  more  that 
of  the  second  division.  Singularly,  too,  the  geuus  is  a  close  one,  the 
species  all  showing  great  atructural  and  color  resemblance.  Why  the 
group  Chrysotoacinw  should  be  retained  to  embrace  forms  so  diverse  as 
Orthoneura  and  Pipiza  I  do  not  understand. 


CHII^OSINI. 

Small  to  moderately  large  species,  seldom  with  light  markings  (Paragus 
Chilosia,  Pipiza  spp.),  usually  the  color  is  uniformly  dark,  icith  or  with- 
out metallic  greenish  markings,  or  icholly  deep  black,  the  face  never  yellow 
{except  in  Paragus),  the  abdomen  nerer  with  entire  cross-bands.  Tliird 
longitudinal  vein  nearly  straight^  anterior  cross-vein  basal  discal. 

a.  Epistoniti  irottiherant,  antenna'  often  elongate,  outer  crods-veins  more  or  less  in- 
flected. 
b.  All  the  femora  thickeiuul  and  with  a  row  of  short  spines  helow ;  hody  clothed 
with  Himrwe  toniuutnm Lepromyia  Will. 

bb.  Femora  not  thickened;  hody  not  tonientose. 
V.   Front  in  female,  and  face  in  hoth  sexes  often,  with  transverse  wrinkles;  false 
vein  of  win}?  usually  obsolete. Ciiuysogasteu  Meig. 

CO.  Front  and  face  not  with  wrinkles;  face  liaiiy,  concave Psilota  Meig. 

aa.  Epistoma  not  projecting,  or,  if  so,  the  hind  fenioni  thickened;  outer  cross-veinN 
more  usually  reflected,  autenuiu  usually  short. 


nddle,  and 
oint  of  the 
iien. 


uliiial  vein ; 

MlCIlODON. 

lioiit  points. 

[IXOGASTKU. 
HYHOTOXUM. 

one  of  the 
])  of  a  vein 
Ceria,  and 
'  points  on 
mblance  is 

the  genus 
ied  species 
MixoijnHter 
I  abdomen, 

European 
ire,  though 

lent  in  the 
nmou  with 
8  more  that 
se  one,  the 
Why  the 
diverse  as 


«  (Paragus 
\th  or  with- 
\ever  yellow 
ids.     Tidrd 

a. 

|)re  or  less  in- 

Ibody  clothed 
ROMYIA  Will. 

[iukles;  false 
liASTEU  Meig. 

3ILOTA  Meig. 

br  cross-veins 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIIDiE.  XVM 

d.  Face  evenly  ronuiU-d  nn<l  |>iloHo Piimza  TiilUn 

dd.  Viu'A'  not  evenly  rounded  and  jiilose,  tulteniilate. 

e.  Abdomen  with  oidy  four  visildc  se^'Mients;  iiristii  Hhort,  suliaidcal. 

NACSlOA-STKIt  Will, 
pp.  Abdomen  with  at  U-a^t  hve  visible  .se;;ni('nis. 
/.  I'aee  partly  or  wholly  yrllow;  abdomen  imnctiilate,  anti'nna-  climiiate:  small 

spoeies l'Ai!.\(irs  J>,itr 

//.   l'a<'e  wholly  blacl  ,  or  at  least  only  with  iuteous  spots ;  antenna!  short. 

t/.  Ilinil  femora  slender ("llil.osiA  Meig. 

gr).   Ilind  femora  thielo'ned  ;  epistonia  projeetiny,-. 

/(.  Seiitellum  nnnsnally  l.ir;;e,  nearly  s(|uare  in  oiiliine;  mules  di.lioptie. 

CllAI.KlMVIA  Will. 

Iili.  .Seiitellum  not  unusually  large,  considtM'ably  broader  at   tlieliase;  nicies  holoii- 
tie .Myioi.I'.PTA  Newni. 

There  i.s  cDiisidorablc^  diversity  in  tiii.s  oroiip,  but  tlicre  i'nu  be  no 
natural  (livisioii,  so  ch)soly  (U)  th«^  cliai'  'ter.s  bUMid  from  one  to  the 
other,  and  l)ewinse  the  relation.ship.s  do  not  i)eriuit  si  linear  arrano^einent 
of  tin'  ;;enera.  Cliilosid  may  be  taken  as  its  most  i)rcd()minant  type,  from 
wliicli  Clif(lci>iuyi(t  and  yaiisif/dnfer  depart  the  most.  The  fjeiins  it.self 
i.s  a  larji'e  one,  with  a  considera!)!('  diversity  of  forms,  but  wiiich,  so  far, 
lias  eluded  attempts  at  latioua!  subdivision.  The  lue.sence  of  a  swollen 
ifrontal  triangle,  or  frontal  groove,  is  eharacteristic  in  not  a  few  species, 
but  they  areevane.scent,  and  not  of  siiUicient  uniformity  to  warrant  their 
iu.se  exclusively  as  a  generic  distinction.  The  neuration  varie.'^  from  a 
'PipizoidtoaSyrphoidtype;  none  except  artificial  distinctions  can  be  made 
iuse  of  here.  The  antenntc  show  only  slight  variations;  generic,  charac- 
ters l)a.sed  chietiy  U])on  these  organs  are  not  generally  reliable  through 
ont  the  family.  The  ])lumosity  of  the  arista  has  been  propo.sed  as  a 
nutans  of  distinction;  but  the  plumosity  is  never  very  strong,  and  the 
ultimate  generic  boundary  would  often  depend  upon  the  power  of  the 
Kmis  emi)loyed ;  nor  can  this  character  be  u.sed  in  connection  with  the 
pilosity  of  the  eyes  and  the  hairiness  of  the  face,  unk^ss  we  are  prejjared 
to  dub  every  possible  i)erniutation  of  the  three  characters  with  an  inde- 
pendent title.  The  pilosity  of  the  eyes  is  also  unsatisfactory ;  its  use 
will  separate  allied  forms  and  bring  together  irrelevant  ones  ;  moreover, 
here,  likewise,  the  microscope  and  possibly  the  imagination  would 
Bometimes  be  the  ultimate  generic  distinctions.  The  hairiness  of  the 
^ace  is  in  itself  wholly  insufficient,  .lud  bears  no  constant  relation  to  the 
)thcr  more  inij)ortaiit  characters.  The  thoracic  bristles  imperceptibly 
jhange  to  hair  and  then  to  pile.  The  limits  of  the  genus  are  al.so  doubt- 
iul.  From  Chrysof/aster  on  the  one  hand,  and  Melanonioma  ou  the  other, 
nothing  more  than  s|)ecill(!  .separation  is  yet  jwssible.  The  relation  to 
I'ipizn,  through  Chrysoffoster  and  P.sUota,  is  equally  obvious.  Yet  again 
We  cannot  overlook  the  natural  affinity  with  species  o{  Myiolepta. 

l'il>iz(t  and  r.silota,  as  here  emjjloyed,  are  unquestionably  nearly  re- 
lated forms;  indeed  further  discoveries  may  require  their  union.  The 
former  genus  has  been  very  nuich  subdivided.  A  knowledge  of  nu- 
merous .species,  however,  constantly  tends  to  break  down  the  distinc- 


« 


1 


XVIII        niIM,i:TI\    31,    UNITED    8TATKS    NATIONAL    MUSKUM. 

tioiis.    Tlu'  follttwiii;;  ill*'  the  cliiiiactrrs  us<mI  hy  Kowar/,*  iiii  able  Eu- 
I'opfaii  (li|)tt'i'()li);^M.st,  to  dctiiir  the  ^<>iii'i-i(;  siib(li>  isiotis : 

1.— 'I'll  i  III  fill  I  el  1 1  111  I  Jiijnt    slrl'iliT  IIIkI  loll^ 2 

Til  I  I'll  Jill  II I  sliiiii  mill  linnul 3 

2.— Tlif  iiuxiliiiry  vein  tcriniiiuti's  l)i?fiiri>  lluuinti'rior  i-msM-vtin I'iimzki.i.a  IJoikI. 

Tlif  iiuxiliiiry  vein  tiMiiiiiiiitcs  Ih-voihI  tin- iiiilt'iim  ridss-vcin lli;iii.\(iiA  Kuinl. 

3.  — i'roiitiil  triaii;;l(*  i>f  llio  iiiiiU-  (oiiiiia 'iitivrly  liir;;i'  ami   airlii'il;   IVoiit  of  I'finaU' 

wit  bout  a  til  ft  of  whiter  hairs  near  tlif  orliil  ... 4 

Fioiitul  triaii;;h' not   lar;;c,  of  untial  (oriii :   front  ol"  friiiali' with  «  tuft  of  whilo 

hiiiis  iH-ar  tlitMnhit I'll'iZA  I'aUoii. 

4. — liiiiil  coxa*  of  male  with  N|iiiioiiH  procu^iH;  front  uf  I'iMiialc  with  a  diNtiiu^t  tniUM- 

vcsrso  yroovt'  m-ar  tin-  iiiiililU; Cnkmodon  K;;>;t'r. 

Malu    cnxiu    without    N])iiioiiH    proci-Ns;     front    ol    fiMiialu    without    trauHvurue 
Sroovf I'K.MiM  I'hil. 

An  t'xamiiisitioii  of  those  cliaracti'is  seriatim  will,  I  think,  show  their 
invalidity  as  jteneric  distinctions.  1  by  no  means  wish  to  say  that  they 
are  withont  value,  or  that  the  names  shonld  be  abandoned,  but  that 
their  present  substitution  is  notjustilied. 

1.  All  intermediate  staj^es  will  oeeur  between  a  lonjf,  slen<ler  antenna 
ami  a  short  broad  one,  where  it  will  bo  impossible  to  refer  a  species  to 
either  of  these  (livisioiis  without  we  take  an  artilicial  standard. 

2.  The  same  may  be  said  of  the  termination  of  the  auxiliary  vein. 
What  will  we  do  witi»  the  species  where  the  termination  is  oi)posite  the 
cross  vein  ? 

;{.  The  presence  of  a  swollen  frontal  trianj^le  is  a  useful  character, 
but  the  same  objection  may  be  urjjfed  a,i>ainst  it  as  aj;ainst  the  two  pre- 
cedino-  ones.  The  s  ime  feature  occurs  in  species  of  both  Cliilosia  and 
C'liry.so(iaNt(;r,iunl  was  formerly  made  use  of,  in  the  former  at  least.  Its 
acceptance  here  will,  pari  passu,  necessitate  its  em])loyment  in  allied 
jienera. 

4.  The  ju'esence  of  a  coxal  spine  is  perhaps  of  {;reater  value,  yet  we 
must  not  Ibrjjet  that  the  same  character  is  disregarded  elsewhere  in  the 
family.  Xo  one  will  think  of  generically  separating  Xijlota  bicolor  and 
A'.  iibinliH,  or  llclophHus  distincfus,  that  has  been  v.onfounded  with  JI. 
chrysosfomiis,  on  this  character. 

The  introduction  of  such  line  distinctions  is  undesirable  in  any  genus 
wlieii  characters  of  the  same  or  similar  nature  are  nnrecognized  in 
allied  genera.  It  is  tru(!  that  arbitrary  distincMons  in  the  comparative 
slia]ie  of  the  antenna',  etc.,  we  are  compelled  to  nsv  to  a  great  extent  in 
tli<'  MuNcidw  e(tl;/ittr((ta' ;  but  at  the  same  time  we  must  admit  the 
almost  insuperable  (lilliculties  which  the.se  families  present  to  sys- 
tematic study;  so  great,  indee.l,  that  there  are  but  three  or  four  ento- 
mologists (among  whom  we  must  award  to  Mr.  Ivowarz  the  first  rank) 
who  are  capable  of  interpreting  them. 

Two  species  of  Trif/h/jiliiC'i  have  been  described  by  Loew ;  both  ol' 
them  1  have  placeil  nnder  P'/x'cy.,  as  from  an  examination  of  the  types 

*Wien  Ent.  ZiMiiing,  iv,  '^41. 


i 


at  Ol 

Ntanr 

abdo 

<'ies. 

other 

<tf  till 

Tin 

lelatii 

of  its 

alxloii 

It  n 

Perha 

object 

sp:'cie 

but  lit 

them : 

that  ii 

jieat.s  i 

How 

l.rpnnt 
latter  t 
are  all 
sparse  ■ 
intermt 


Snnili 

{jrernislt 
il roil  nil  ( 
alviuhr, 

<i.  Will- 


I 


Oil.  W'jllir 

i 

li-  I'roiit 

''/'.  I'roiit 


v|      The  gi 
;^M]y  iiiti 

tledlle,  ;i 

On  the  o 
relations 


\ 


SYNOPSIS    or    Nt)|fTll    AMKRICAX    SYRIMIin.E. 


XIX 


ble  Va\- 


2 

3 

i,A  ISdikI. 
lA  Uoml. 
id  tVinah' 

4 

ot  wliitu 
;a  Fii'.W'ii. 
ict  tniiiH- 

raiiHvcrse 
.ilM  Phil. 

ow  tlK'ir 
hut  they 
1)1  It  that 

:■  aiiteiiiui 

pecies  to 

1. 

iary  vein. 

)OHitc  the 

•havacter, 
'  two  pre- 
Uosia  and 
ist.  Its 
u  allied 

■,  yet  we 
Mv  ill  the 
icolor  and 
with  H. 

my  genus 
jnized  in 
ni)aiative 
extent  ill 
idmit  the 
It  to  sys 
four  ento- 
list  rank) 

,- ;  \)oth  of 
the  types 


at  Cambridge  I  coiild  not  disi'ovrr  dilVereniies.  Tlie  gonns,  as  I  niider- 
stiiiid  it,  i-  ltas4'd  upon  the  pieseiirt'  of  but  lour  visiblr  segments  in  tiie 
alMlomeii  with  t-loiigation  ol"  tlie  iiirdian  tnies.  Tlu'  types  «»t'  lla'sr  sp»'- 
«-i«'s.  liowcvci,  show  till'  litili  si'giiM'iif  to  be  as  wt-ll  devi'lopcd  as  in 
«»tlier  species  ol'  /'//</:((,  and  with  no  appreeiabh^  greater  development 
of  (he  third  iiliil  tbiirth  segiiietits. 

The  genus  \oi(slii<isfrf  is  u  very  peculiar  one,  and  has  only  slight 
lelationship  to  the  other  genera,  except  perhaps  I'oriifiuH.  On  account 
of  its  general  habitus,  its  puiu;tate  in. i.  kings,  and  the  strnetiire  of  the 
abdomen,  1  pla(!e  it  here. 

It  may  be  objected  that  1  place  the  gi'iiiis  Mj/ioh iifa  in  this  group. 
I'erhaps  did  1  know  the  Kiiropean  species,  1  should  feel  the  Ibrce  of  the 
objection  myse!'',  but  certainly  in  the  American  species  the  allinity  with 
sp'.'cies  of  (Jliili)Ni(i  (!aniiot  be  overleoUed.  "SN'here  the  hind  femora  are 
but  little  tlii(rkened,a!id  without  spines,  tlu're  is  but  little  to  distinguish 
them  :  even  the  lu'.eous  coloration  in  the  female  of  some  specicH  iniinicM 
lli.it  in  the  femah'S  of  some  C7a7o.v/Vr,  and  the  male  facial  tubercle  re- 
jieats  its»'lf  in  certain  (Jltilosiai  nmX  (Jlin/sot/aittrfv. 

How  l>oevv  could  have  overlooked  the  striking  relationship  between 
/jpnmifitt  cnlopuH  and  Mifiolrpta  striiiilata  I  cannot  ac(;oiint  for.  In  the 
latter  the  third  Joiiit  of  the  antenna'  is  distinctly  elongate,  the  femora 
are  all  thickened,  with  short  spines  below,  and  the  body  is  clothed  with 
sparse  tomeiitum,  all  characters  of  the  genus.  Tlie  genus  thus  holds  au 
intermediate  position,  connecting  CItrijsoijashr  and  Mi/ioUpta. 

I  MELAXOSTOMIXI. 

Sniiill,  elonf/tifr,  fhiuli/  pilose  ftpecies^  deep  black  or  tihininff  (/rccn,  the  ob- 
ilomen  uxuaUy  sh-xder  xcith  interrupted  bandx  of  briijUt  yellow,  orange,  or 
{jrtriiisli-ycJloir  color;  face  nniformh/  blacli,  or  at  least  nercr  irltlt  lif/ht 
{/roil )id  color.     Antcnme  short,  face  tubcrculatc  ;  nenration  Syrphoid  ;  legs 

alcndcr. 

u.  Wings  not  loiif^cr  tliaii  tlio  alxloinou  ;  ocollartiibort'lf  larj^c,  iironiiiuMit ;  iiltdoinen 
<lci»ri!.sw«(l,  till!  liyhtiT  markings  l'i'rin<jiiu>ii8  «r  orangf  colored. 

l'vi:(ii'ii.i:xA  Scliiner. 
<?(/.  Wiiif^s  longer  tliaii  the  abdomen  ;  ocellar  tnliercle  not  luinsiially  large;  alidoineti 
more  slender,  the  cross- bands  yellow  or  grei'iiish  yellow,  soiuetiuie.s  Hbiniug 
metallic. 
I).   I'ront  tibiie  and  tarsi  of  the  male  dihited.  those  of  tlie  female  Hli^htly  widened. 

rLATVCHilMs  St.  Targean  and  Si  iville. 
/'/'.  ]'ii>iit  til)i;'!  ainl  tarsi  in  Imth  sexes  slender,  not  widened. .  Mici.anoskima  Scliiner. 

The  genus  McUinostoma  may  be  taken  as  the  tyjieof  tliis  group.  The 
only  ultimate  dilference  between  this  genus,  .^  ■>  far  as  I  can  iliscover  or 
delMie,  and  Cliilosia  is  in  the  absence  of  entire  abdominal  cross-bands. 
On  the  other  hand,  the  distinction  iroin  Siir2)hus  is  jiurely  specilii;.  The 
relationships  of  riatychirus  n\u\  Pyrnphccna  are  obvious;  indeed  in  the 


XX 


BULLETIN    :n,    nNITEI)   STATK8   NATIONAL   MUSEUM. 


femaUt  tluTc  is  sj^iin'cly  any  appn'ciahlr  (lilliTciuus  at  l«'ant  in  tlio  former 
};emiM.  l*{iropli(V)tn  is  an  t'xcoliciit  t'xanipli!  of  a  faulty  taxononiic,  chiK 
Nill(;ation  ;  wliilc  tiic  tlattcnln^  of  the  toi'('l(>;;.s  is  made  a  ^'fncriit  vUwr- 
acter  in  I'latifvliinm,  niu(;li  ^''^'iitiT  strnctiual  ^lillrri'iici's  in  tlii'  Ir;,'s  of 
Pjfroitlnrua:  only  rcccivti  a  spceilii-  valuation.  Undoubtedly,  should  the 
nuMdier  of  species  winrant  if,  a  ;,'eneri(r  line  will  be  drawn  between  /'. 
oc7///>/and  /'.  r(t.s«in(iii,\m\  on  the  basis  of  natural  elassilieation  it  should 
not  matter  whelhera  j^enus  contained  one  or  ont^  thous.iiul  species. 

Jt  amy  be  ol)jecied  that  tiiis  ^noup  is  n«>t  entitled  to  the  rank  I  jjfive 
it;  but  if  it  l)e  united  with  the  Si/rphini,  \\iv  t'liilosini  must  be  also. 
Shall  wji  place  ChryHiujdHlcr  and  ^Sijrpliun  hi  one  group  ll  As  well  place 
tbe  whole  family  in  one  group. 


8VIM'1IINI. 

Black  or  {freenislihlack  ftpeck'n,  itHiiallif  with  yellow  abdominal  bands, 
the  face  whoUij  or  in  part  yellow.  Martjinal  rell  of  the  icin().s  wide  open, 
third  vein  raicly  (l)idea)  cur  red  into  the  Jirnt  jWHterior  cell,  anterior  cross- 
vein  near  the  base  of  the  discal  cell.  Antenna'  short,  face  tiihercnlate, 
abdomen  usually  oval,  le(/s  slender,  hind  femora  rarely  thickened  (Meso- 
grai)ta  sp.). 

a,  Tliifkly  pilost'siuicicH;  uhtlomcii  fiiiitf  oval,  lirondor  boyond  llu-iniddlt^    UiiHiil  jxn- 

tuni  of  a1)(lom<!ii  yellow,  tiTiiiiiml  portion  Muck 

Leucozona  Scliiner. 
aa.  Kathcr  buro  Hpccit'N;  ubilonuni  not  so  iiiiirk<Ml. 

b.  Tborax  never  with  yellow  lateral  inarkings. 

0.  Sixth  abdouiiuul  sef^nient  of  the  male  hh  lonj;  as  the  two  preceding;  tofjetlier,  bnt 
narrower,  soniewhat  tubular,  unsyninietrieal ;  on  uiiderHido  of  the 
seventh  wgnient  with  two  long  linear  siibparallel  ai>i>endage8, 
arcuate,  bidontieulate  at  the  end,  embedded  in  grooves  when  at 
rest.     In  the  female  th(!  lifth  segment  half  as  long  as  the  i)reeeding. 

Scutullum  much  raised,  exposing  metanotuni Eltkouks  O.  S. 

00.  Hypopygium  without  slender  a]>i)endage8,  sixth  segment  of  male  not  jfeenliar; 
lifth  segment  of  female  one-third  or  ouofourth  us  long  us  jireceding 
segment. 

d.  Third  longitudinul  vein  with  a  distinct  enrvature  into  the  first  ))osteror  eell ; 

third  joint  of  the  antennuj  elongate-oval Didka  Macq. 

(Id.  Third  lougitudinal  vein  straiglit  or  gently  curved  ;  third  joiut  of  antenme  siiort 
oval. 

e.  Eyes  of  male  with  an  area  of  enlarged  facets  above;  front  very  convex;  hypopy- 

gium very  small C'ATABOMnA  O.  S. 

re.  Eyes  of  male  without  an  area  of  enlarged  facets  above;  front  moderately  convex; 

hypoitygium  not  very  small SyrpiP'-S  Fabr. 

bb.  Thorax  with  yellow  lat<'r.il  stripes. 

/.  Eyes  of  mule  with  an  area  of  enlarged  facets  above;  fourth  segment  of  abdomen 
in  both  sexes  with  two  median  yellow  stripes  and  an  obli(jue  spot 

on  each  side Allogr apta  O.  S. 

ff.  Eyes  of  male  wholly  without  an  area  of  enlarged  facets  above;  fourth  segment  of 
abdomen  not  so  marked. 


fh 


i 


8YN<>P.*«IM    OF    N'OKTU    AMKKICAN    SVKI'llIli/K 


xxr 


)  foniuT 
lie,  t'.IiiM 
ic,  cliiir- 

•  U'J^H  of 
Xllll  till' 
Wl't'll  /*. 
t  .shoiiltl 
•ii's. 

k  1  K'^'*' 
bu  also. 
ell  pluco 


i 


'iilf  open, 
iot'  eroNH- 
hervidotc, 
id  (Mtso- 

IJiiHal  por- 
•JA  ScliiiuT. 


4 


tlicr,  l>nt 
Hide  of  tho 
jM' III  lilacs, 
s  wlicii  at 
|)ri!tt'(liiiK. 
>I)KS  O.  S. 
liccnliar; 
]»ri'ce(liiis 

itfior  rt'll ; 
IDKA  Miicq. 
eniiie  Hhort 

;  liyi'"i'y- 

OMUA  O.  8. 
\\y  coiivfx; 
i'ii:s  Fiibr. 

[)1"  iibdonieii 
blique  spot 
lAPTA  0.  S. 

segment  of 


1).   I'licr  ircnliii;.'' :  tliiiriix  wjtliiiiit  Mii-diiiii  ilotMal  I'iiii  ri'oiiH  liiii'. 

\amiiim,i:.\mma  Srhiiii'r. 
(/»/.   I'liri'  Htiitiinlx  ptdji'itinit  Im'Ikw. 

/(.   DnrMiiiii  of  till  MUX  witli  II  tiit'iliaii  liiH'ri-niiN  liiif MiHOdiiAiTA  I.iii>w. 

I>l,.    lliirsiiiii  III   tl.iiias  witliiiiil  siiili  line iSni.lliiil'iiiiiilA  St.  F.  iV  Sitv. 

Tin-  ;;»'iius  Siiritliiin,  lis  now  rrsf nctnl.  prcst'iits  a  tciiiiii kalilc  iini- 
roiiiiilN  ill  stiiictiii'iil  cliiinictcis,  iiiiil  rvcn  iii  iiiiit  Kiii;:s,  as  well  as  in 
llir  li\il,v  ol'  spccilic  (;liaract(  rs.  A  It'W  «liv«'r!i:<'nt  roiiiis,  it  is  true,  as 
S.  i/niiriihitiix,  ai«'  f^i'di,  hiil  on  tlu'  wlioli-  the  ;f<'nns  is  a  rtosf  oiif;  tliis, 
|io\vf\«'r,  has  not  incvcntcd  att<'iii|>ts  iit  siiitdivision.  Tiicic  an-, 
llioii^li,  many  osciilaliii<^  points  anion;;  its  conclatcd  t'onps.  l-'rotn 
IHiliii,  tliron^li  N.  iirciiiifits  InippouicuH,  notliin;;  nioic  than  spccilic,  dij" 
Icit'in-cs  arc  found.  I'roin  A'lUitlioffrtimnin,  throii;;h  \.  <  unirfjiinitinii,  {\i\'- 
I'cicnccs  of  even  h-ss  value  appear.  Its  coaU'scciicc  witli  Mehinnstntna 
(tlii()n^li  iV.  Hiniplf.r,  Cor  instain't*)  has  alieaiiy  been  toiiciied  upon. 
Otiici  allied  j^cnera  are  Cotohouiha  ami  IJiipmilts,  wiiere  tiie  din'cij'iices 
are  almost  wholly  conlined  to  (lie  male  sex.  I.nivozoiut  is  strnetnrally 
iliicd.  but  the  pilosity  and  marUin;is  remove  it  liirtlici'.  W.ith  Alio- 
i/niplii,  Spliuioplinriii,  and  Mtsotpaptx.  the  relationship  is  likewise  very 
apparent.  All  these  have  a  m.>re  or  less  elongate  alxlomcn,  as  in  some 
species  of  »S'v/7>//«.s,  bnt  besides  the  yellow  markin;;s  of  the  thorax  tho 
stnurtnre  of  the  head  is  similar  in  the  last  two,  to  which  Asarkina  may 
be  added. 

Tho  {,'enus  Peleeorcra  show8  the  nearest  relation  with  the  Syrphini; 
but  the  structure  of  the  liead  removes  it  so  far  from  the  other  jjenersi 
that  I  prefer  to  ^ive  it  an  indei)endent  place  here  for  the  present. 

SPIIEtiJXIXI. 

SiiKtllj  slender,  ehuHjaic,  thiiih/  pilose  species,  with  more  or  less  yellow 
nuiriiiiiijs  on  head  and  abdomen.  Antenna'  short,  cpistoma  produced; 
ni((rtjiii((l  cell  of  the  winfis  open,  third  longitudinal  lu  in  straiijld  or  yently 
rurrcd,  anterior  croHS-rcin  near  the  hasf  of  the  disval  all  and  reetamiular, 
alidonu  ii  eontraetnl  towards  the  base,  the  i/rcatrsl  width  beyond  the  middle, 
ill  outline  einbshaped  or  spatulale;  hind fouora  thiehened. 

I'.   I'.piNlipiiia  produced  anti'i'ioiiy,  in  jn'olilc  drrply  comcmvi'   IVom  jiiitiMiiia>   to   tip; 

llii  111  joint  of  antennae  nearly  orliiciilai'. Spni:(ii.\A  Mfi^- 

'*//.   I",|iisl()iiia  laodnct'd  iiioi'c  dowiiwai'd,  in  ]ii'olilc  sli^^Iillv  coiiiMve  IVoin  aiiti'iina'  to 
lip Ni'.oASciA  Will. 

This  };roiip  in  America  offers  well-defined  limitations,  characterized 
by  the  small  size,  abdomen,  and  face.  It  is  one  of  the  oldest  geolog- 
ically. 


XXII       r.rij.iynx  31,   ixiTr.n  statks  national  museum. 


IIKAC  IIVOIMM, 

Mnth>a:r  si:t'(l.  iictirln  Intrv  spfvics.  vhUjhj  or  icliollif  retldish  or  UiIpovSj 
or,  if  ill  Idifir  jiait  hhirl ,  irithoiit  lif/ht  i/rlloK'  iiiorhiugs.  Antenna'  short; 
obdoiiii'i  not  clnhxlmiinl;  o titer ior  cross- vein  he/ore  middle  of  the  diseal 
cell,  UKUi/iiKll  eell  iride  o/yr». 

(/.   K|iiNti)iiiii  jirodiiccd  into  a  loii^'  sltuidtu'  porrcctcd  .'siioiit;  feniorii  .slt-ndcr;  tli» 
tliiid  li)ii};'iiiidiiial  viiii  jdiiiM  llui  costa  ln'yoiid  tlio  tip.  ..IJiiixgia  Scopoli, 
,1(1.    I'iici'  iM)t  so  |ii'(idiirfd,  hind  li-iiioru  inoro  or  lens  tliic'i<cn<-d. 
h.   Fact'  iirodiici-d,  olttuscly  tiiltcrculatf,  thorax  with  briHtics,  abdoiiicii  (']oiijj;at(', 

Elt.kxiamyia  Will. 
bb.  Viuv.  caiinatf,  abdomen  oval,  tirsl  i)osH'ii()rtt'II  Hliort  iietiolatc. 

c.  Aii.sta  bare Hkachyopa  Mimjj. 

cc.  Arista  jdunoso Kxociiila  RoiuL 

These  genera  present  a  considenible  divergence,  but  are  best  asso- 
ciated together.  Why  they  should  hitherto  liave  been  classe*!  among 
the  Vohicellina;,  rather  than  the  Si/rphina',  I  do  not  understand.  Rhingia 
is  well  marked  in  its  remarkably  projecting  epistoma.  lu  neuration  it 
finds  its  greatest  resemblance  in  some  species  of  Chilosia. 

Jirucliyopa,  Exoehila,  and  Eugeniamyia  are  all  closely  allied,  and  might, 
perhaps,  be  best  associated  in  the  ^ame  genus.  There  is  a  tendency  in 
all  the  genera  to  the  presence  of  thoracic  bristles. 

VOTAr<"Kr.L,lNI. 

Mostly  large  spceies,  uniform  in  color  or  rariahle.  Third  joint  of  the 
antenna'  more  <>r  less  <  longnte,  the  arista  always  plumose ;  eyes  nsuallypilose  ; 
body  nearly  hare  or  t  hich  I  y  pilose ;  abdomen  short,  thiek,  strongly  eon  rex 
abort' ;  marginal  eell  if  the  icings  nsnally  closed  and  petiotate,  third  longi- 
tudinal rein  nearly  straight,  the  fourth  rein  Joins  the  third  a  considerable 
distance  before  the  tip,  inileeted ;  anterior  cross- rein  usually  towards  the 
base  of  diseal  cell ;  legs  slender,  hind  femora  nerer  thickened. 

(I.  Arista  vt'ry  densely  i)lnmosi',  appoarinj^  like  a  solid  iiiass.  ..('orKSTYiA'M  Maecj. 
an.  Arista  Ceatln-ry  i)liin)ose Voll'CKI.la  Geof. 

The  pH'sent  and  following  groups  contain,  with  few  exceptions,  more 
robust,  thick-set,  and  usually  pilose,  species.  The  two  genera  from  the 
United  States,  located  here,  are  sharply  separated  from  all  others  by 
the  presence  of  a  closed  niiirgiual  cell  and  plumose  arista.  In  certain 
species  of  Volucclla,  however,  the  marginal  cell  is  closed  very  near  the 
tip  of  the  second  longitudinal  vein,  and  rarely,  in  some  individuals,  is 
narrowly  open.  Such  spec^ies  foriii  the  natural  connection  wit'.i  J'hala- 
cromyia,  ditferingonly  in  this  respect,  a  genus,  so  far,  extralimital,  and 
bearing  the  same  relation  to  Volucclla  that  Ilelophihis  does  to  Uristalis. 
It  is  very  desirable  that  Volucclla  should  be  divided  ;  the  species  are 
numerous,  and  a  considerable  variation  exists  among  them.  No  char- 
acters have,  however,  in  my  opinion,  been  lound  that  will  accomplish 
this  result  satisfactorily.  Temnocera  St.  Ftirg.  &  Serville,  an«l  Atem- 
nocera  Bigot,  are  too  artificial  in  tlieii'  limitations.  The  former  is  based 
upon  the  excision  of  the  third  Joint  of  the  antennae  and  the  presence  of 
bristles  upon  the  scutellum.     In  a  number  of  sjjccies  the  bristles  are 


««. 


id'  short ; 
he  diisfal 

•iidir;  tln» 
A  Scopoli. 

rloiif^ate,        ^ 

MYIA  Will. 

«)I'A    MlMJJ. 
IILA  lioiuU 

est  asso- 

(l  among 

lihingia 

aration  it 

lid  mighty 
ideiicy  in 


tint  of  the 
IhipUose  ; 
jlif  coin' ex 
lirtl  Joufi'i- 
nsUhr  (title 
wards  the 


iXM  Miicq. 
icr.LA  Gfof. 

0118,  more 
from  the 
others  by 
u  certain 
near  the 
idnals,  i.s 
t!i  Phalli- 
ital,  and 
EristaliH. 
jocies  are 
No  char- 
corn  plish 
nd  Atem- 
is  based 
eseuce  of 
sties  are 


4 


SYNOPSIS    or    NORTH    AMERICAN    SYKPITID/K.  XXIII 

present  without  the  antennal  (^h  .'acter — for  these  Atemiwcern  is  ])n)- 
posed.  l»nt  to  be  consistent  yet  anothei  division  should  be  created  for 
the  ex(!ised  antennic  without  the  scutelhir  bristles,  as  in  Volucclla 
meffaccphala.  ICven  such  a  dismenibennent  of  tlie  genus  might  b(!  well, 
were  it  natural,  but  it  is  not ;  allied  species  are  torn  asunder  and  unre- 
lated ones  arc  thrown  together.  A  natural  classification,  moreover, 
would  require  the  same  treatment  of  Phalacroiuifia. 

SI<:UlCOMYIXl. 

Large  species;  antenna'  short,  the  third  joint  scarcely  longer  than  broad; 
arista  basal,  plumose ;  anterior  cross-vein,  of  icings  oblique,  near  the  mid- 
dle of  di seal  cell ;  kind  femora  sometimes  thickened. 

a.  Moderately  pilose ;  altdoiiK'n  with  yellow  iiiterr\ipted  cross-bandH 

Skuicomyia  Meifj. 
««.  Thickly  pilose,  abdomen  nuifonnly  black Arctophila  .Scliiner. 

This  group  at  present  is  limited  without  much  difficulty.  Still  the 
forms  are  not  very  closely  allied  in  some  of  their  species.  The  con- 
nection between  the  two  genera  is  found  in  S,  niiUtaris.  In  Arctophila 
Jlagrans  the  thickened  hind  femora  and  curved  third  longitudinal  vein 
present  a  relationship  with  the  next  group. 

ERISTAIilNI. 

Mosthj  large,  pilose  species,  uniform  in  color,  or  more  or  less  variegated ; 
third  joint  of  the  antenmv  short,  oval  or  transverse;  third  longitudinal 
vein  with  a  deep  eoiicavitg  into  the  first  posterior  cell;  anterior  cross  vein 
near  or  hegond  the  middle  of  the  discal  cell;  hind  femora  thiclened,  except 
in  species  of  liristalis. 

«.  Mar;;iual  cell  closed  and  petiolate. 

ft.  Thorax  never  with  yellow  niarkings. 

(1.  Frontal  trianjrle  of  male  strongly  protuberant DoLiusYKPHrs  Bigot. 

tc.  Front  evenly  arched Kristams  Latr. 

bh.  Thorax  with  yellow  Hjjots. 

d.  Hind  femora  without  a  conical  projection  below,  near  the  end, 

Pteroptila  Loew. 
dd.  Hind  femora  with  a  p  -yection  below  (Milesia). 
aa.  Marginal  cell  o])en. 

e.  Arista  plumose  (Sericomtiini). 
ec.  Arista  bare. 

/.  Face  with  a  longitudinal  ridge  in  the  middle  ;  hind  femora  ntrongly  thickened, 

and  with  an  angular  protuberance  below Tropidia  Meigen. 

ff.  Face  not  distinctly  carinate  ;  tubercuLate  or  rounded. 
g.  Thorax  and  scutellum  not  densely  jiollinose  above. 

h.  Third  joint  of  antenna-  oval ;  dorsum  of  thorax  usually  with  distincit  stripes, 

Helophiix's  Meigen. 
hh.  Third  .joint  of  antenn;o  broad  ;  throax  not  vittato. 

i.  Thickly  pilose Mallota  Meigen. 

it.  Thinly  pilose  Triodonta  Will. 

Teuchocnemis  O.  S. 
gg.  Thorax  and  scutellum  very  densely  pollinoso  above PxERAr.r.AsrES  Loew. 


T 


XXIV         BULLETIN    81,    UNITKD    STATES    NATIONAL    MUSEUM. 

This  jiToup  is  a  natural  oiio,  but  it  Lsiiot  dislinctlysopa rated  IVom  the 
following.  ErisUilis  shows  u  considorable  diversity  in  coloration,  but 
less  in  structure.  In  many  of  the  species  the  hind  leniora  are  slender, 
in  otiiens  sometimes  much  tliickened  {Simoidcs  L\v.) ;  this  cliaracter  will 
not,  liowever,  serve  tbi-  generic  separation.  Nor  can  tlie  al)siMu;e  of  the 
moderate  plumosity  of  the  aiista  [Eristdloiiii/ia  I'ond.)  serve  to  divide 
the  ;',enus.  It  tlmnvs  to<;ethei'  uni«'h)ted  species.  The  pilosity  of  the 
eyes  seems  to  be  equally  unsatisfactory.  The  relation^liip  nl' PhKjiovcra, 
tSenaspis,  /^/owc>■^^s•,i>r>//<>.s7/^j;^/^s•,Jl/(Y/a.s/>(^s•,  el  c.,ean  not  a!  ways  be  sharply 
<lelined.  Two  of  these  appear  in  our  fauna,  and  will  tea<lily  lie  disrin 
guished  by  the  {general  liabitus,  structure  of  vhe  liead,  et(t.  In  North 
An)erica,  J'Jristidis  is  shari)ly  distin;.;uished  from  Ih-lophiUiH  by  the  closure 
of  the  niarginal  cell.  In  Europe  and  Africa,  however,  the  two  genera 
coalesce,  some  species  of  ErLstaUs  having  dichoptic  males  {]Jfi,st<i]iuiis 
Rond.);  other  species  of  Uelophilus  holoj)tic  males  and  without  any  of 
the  ciiaracteristic  marlvings,  and  with  tlie  marginal  cell  only  nairowly 
open.  So,  too,  Ilclnjfhiliis  is  ultimately  distiiiguislied  from  MaJlofu  oidy 
by  a  very  slight  difference  in  the  third  joint  of  tlie  antenna'.*  The  group 
of  genera  immediately  surrounding  Mtillotn  is  an  unsatisfactory  one,  and 
veiy  diili(;uit  to  define,  rteralla.strs  will  be  easily  distiuguislied  by  its 
geneial  habitus,  and  the  i>reseuce  of  dense  jxilleii  on  l!ie  upper  surface 
of  tiie  thorax  and  scutellum,  but  IVuchocnemis  mnl  Tr'uulnuta  are  not  so 
easily  disposed  of;  botli  of  tliem  differ  Irom  Mallota  in  being  thinly 
pilose,  but  there  is  no  other  taugil)le  cliaracter.  Tcucliociumis  was  based 
u])on  the  presence  of  an  internal  hind  tibial  spur  in  the  male,  but  the 
same  feature  occurs  in  the  ti'ue  Mdllotw.  The  two  species  placed  in  this 
genus  are  not  homogeneous.  TriodonUt  cannot  be  phuH'd  underil/fror7o«, 
on  account  of  the  antenriiii,  termination  of  the  fourth  vein,  etc.;  its  di- 
choptic male  is  coinuu)n  to  Kuiopean  species  of  Mallota.  It  U  very  singu- 
lai'  that  the  genus  Mcrodon,  so  richly  rejnesented  in  Europe,  does  not 
occur  in  our  fauna.  The  relationship  of  Malhta  is  evident  with  Xylota. 
(See  Schiner,  Nov.  Exped.,  'M'A).) 

XYIiOTIIS^I. 


Third  loufi'itiuUnal  cein  oitli/  fjcndij  curved,  marginal  cell  open;  anterior 
croHH-vc'ni  near  or  bei/oitd  the  iniddlcof  dinvul  cell,  ii.suiilli/obU(ji(e ;  antenna' 
short ;  thorax  without  ijelloic  nuirJiihfi.s. 

Xi/lo/iiii.  —  AlxloiiH'ii  inorc  (ir  lihs  cioiiji.'itc  ;  liiiid  rciitora  moir  or  less  tliii.'kt'ncd,  witli 
projei'tkiiis  or  npiiiL's  Iii'Idw  :  I'mci' williont   tiilici'dr;  irmiIv  liiirc  spccieH;  eyes  larye. 

a.  I'aei'  Ktroii<j;Iy  eiiiinaU' ;  liiud  l'''iii(ii',i  t  hicki'iicd,  witli  an  ati;;uLii'  iirotalici'aiice 

below  near  tli(>  end 'I'ltoriDiA  Meij;. 

art.    I'aee  not  eaiiiiati'. 

b.  Third  Hexnunt  ol'  the  airdonicii  in   the  mah-  veiy  iniieh  contiaeli'd,  eyliiidrieal, 

tlie  hind  I'eniofa  iniieh  IhicdviMieil,  with  a  liilid  s])ine  below  at  the  tip. 
Eyes  very  larf^e,  face  small SK.Noti.^si i:u  Macq. 

"  I'^veii  this  dill'erenee  is  not  aeeepted  l)y  Sehiuer  in  Ilehipliiliis  aulijmilK.i  .Sell.— No- 
vaiii  Exiled.,  o.V,),  — Aiieklaml. 


[. 

.  IVoin  the 
ition,  but 
.1  slendiir, 
acter  will 
iici' of  the 
to  divide 
ity  of  the 

)('sliaii)ly 
he  distill 

In  North 
1 10  closure 
\'()  j>eiieni 
■]ri,sf(iUinis 
)ut  any  of 

narr(»\\iy 
illofa  only 
Ihe  <;roui) 
y  one,  and 
lied  by  its 
L'r  surface 
are  not  so 
ing  thinly 
was  based 
le,  but  the 
ced  in  this 
rMeroflon, 
tc;  its  di- 

ery  singu- 
,  does  not 

th  Xylota. 


I 


;  anterior 
antenna' 

iktMKMl,  with 
eyt's  ItUf^e. 

rot  ;il)is'itii(.'(! 
riDiA  Mui^. 

cyliiKhiciil, 
,it  llii!  tip. 
-ir.li  Macq. 

i.-t  Sell. — No- 


i 


SYNOPSIS   OF   NORTH   AMERICAN   SYRPHID^.  XXV 

56.  Hiud  femora  more  or  less  tbickeaed,  with  spines  or  bristles  below,  nevor  with 

a  bitid  spiue  ueiir  the  tip. 
c.  Hind  fcuiora  very  much  thickeued,  anterior  cross-veiu  rectaii{;»lar, 

Syuitta  St.  F.  &  Serv. 

CO.  Hind  femora  m  .'ir  rcniiirkably  thii:kemHl,  hind  coxaj  often  with  .spinous  process; 

cross-  ^ein  always  obliciue Xylota  Meig. 

6V(oWiiH(«i.— Mostly  \ui^m  species,  pilose. 
((.  Scutelluni,  margin  of  thorax,  and  plcuriu  with  bristly  hairs;  face  distinctly  tnber- 

culate;  femora  sliMuler Chuysochlamys  Kond. 

au.  Thorax  wholly  without  bristly  hairs. 
h.  Face  short,  not  produced,  concave,  not  tubercnlate ;  hind  femora  more  or  less 
thickeued. 

c.  Abdomen  elongate. 

d.  Al)domen  shining  or  oiKKjue  black BraCUYPAI,PL'.S  Macq. 

d(l.  Alidomen  with  bright  brou;-,e  cross-bauds Calupkoijola  Rond. 

' < .  Abdomen  viry  broad,  thorax  densely  pilose,  largo  species, 

PocoTA  St.  Farg.  &  Serv. 

bh.  Face  iifodueed,  longer  than  the  front. 
(.   Face  produced  forward,  i)ointed,  concave  from  the  antenna;  to  the  tip,  not  tuber- 
cnlate, subeaiinate;  hind  femora  thickeued Ciuophora  O.  S. 

ri .  late  not  evcmly  concave,  tubercnlate. 

./'.  Third  joint  of  anicr.iue  jiroduced  above  into  a  conical  process,  terminating  in  the 
thickened  ari.'-ta  ;  femora  slender Mehapioidus  Bigot. 

j'J.  Third  joint  of  antenna',  transversely  oval,  but  little  broader  than  long;  femora 
rarely  thickened CiUORUiNA  Macq. 

Tropidia,  Senof/astcr,  Syritta,  and  Xylota  form  a  uatural,  slightlj'  diver- 
j^ent  group,  showing  an  unquestionable  relutioushii>  on  the  one  hand 
with  Mallota,  on  the  other  with  linichypalpuH. 

The  relationship  oi  Bracliypalpus  with  Foeota  and  CalUprobola  is  evi- 
<lent,  and  between  these  and  Criorhina,  Crioprora  forms  a  natural  con- 
uectiou.    MerapiokJm  aiul  Chrysochlamys  are  less  intimately  related. 

MIIiESIXI. 

Larfle  species,  thinly  pilose  ornearly  hare,  ivith  yelloic  spots  or  stripes  on 
the  thorax  above,  the  abdomen  conspicuously  yelhic  banded.  Anterior  cross- 
rein  beyond  the  middle  of  the  disca!  cell,  oblique;  third  longitudinal  vein 
(jcntly  curved  [except  in  ^Nlilesia).  Antennal  arista  bare;  hind  femora 
elonf/ated  and  moderately  thickened. 

It.   Hind  femora  with  a  conical  protnlicr.iucc  lulow,  near  the  end. 

i'.  Marginal  cell  ol'  wing  closed;   anlcniie  .short Mir,KSlA  Fabr. 

Vh.   Marginal  cell  open,  aiilcniia'  more  or  icss  elongate J^pu.omyia  Meig. 

an.  Hind  femora  witlioni  smli  prol  iilicrauci' ;  niar;;iiial  cell  opin. 

('.   Antenna'  inserted  high   up,  on  a   conical   i)idjeirioii  :   front  sliorl ,  face  niiieh  jiru- 

(Inced  (lov.n'.vaid SriiKco.MViA  Latr. 

<i-.  Anteifna'  sitnaKd  low  down,  short :  face  no!  longer  than  the  iVont .  .Ti'.MXO'^TOMA. 

Spilomyia  and  Temnostoma  aw.  (tlo.sely  allied,  as  is  also  Sphccomyia. 
?[ilesi((,  in  the  strueture  of  the  face  and  wings,  is  more  remote,  but  the 
lejjs  and  genera!  habilns  sliow  an  incontestable  relationship. 


XXVI 


I5ULLETIN    31,    UNITED    STATES    NATIONAL    MIJSF.UM. 


The  nearest  relationship  in  the  i)receding  gronp  is  evidently  witli 
certain  species  of  Criohina.  A  resemblance  between  Milesia  and  Pter 
optila  cannot  be  overlooked. 

Bather  large,  bare,  elongate  species  ;  antennce  longer  than  the  head,  sec 
ond  and  third  joints  stcoUcn,  terminating  in  a  style;  anterior  cross-vein 
beyond  the  middle  of  the  discal  cell,  nearly  straight;  third  longitudinal  vein 
with  a  slump  projecting  into  the  Jirst  posterior  cell.     .     .     .     Ceria  Fabr, 

This  genus  has  been  divided  on  the  presence  or  absence  of  the  frontal 
process,  but  the  character  is  insufficient. 

CHARACTERS  OF  THE  FAMIIjY  SYRPHID^. 

A  false  longitudinal  vein  between  the  third  and  fourth  longitudinal  veins;* 
fourth  longitudinal  vein  united  at  its  e.rtrem'*v  with  the  third  ;  basal  cells 
large  ;  face  without  subantennal  grooves. 

Head  heuiisi)herical,  often  elongated  or  ])roduce<l  in  the  lower  part, 
as  broad  or  a  little  broader  than  the  thorax.  Face  moderately  broad, 
bare,  or  clothed  with  dust  or  short  pile,  excavated  in  profile  under  the 
antenuai  and  projecting  below,  or  with  a  distinct  convexity  near  the 
middle  j)art:  never  with  longitudinal  furrows  or  lateral  ridges,  lusuallv 
convex  transversely,  sometimes  with  a  median  ridge.  Oral  openiu}; 
large;  proboscis  rarely  much  elongated,  usually  but  little  projectinji. 
and,  when  at  rest,  concealed  within  the  mouth;  pali)i  one  jointed: 
labrumepiphiirynx,  hypopharynx,  maxillie  and  labium  present.  Froiir 
never  excavated,  often  swollen,  sometimes  with  ;>  more  or  less  elongate 
process  which  bears  the  antennae.  Antennie  usually  porrect,  approxi 
mate  at  their  base,  three-jointed ;  the  third  joint  more  especially  of  varied 
shape,  usually  flattened  and  with  a  dorsal  bristle,  either  bare  or  pin 
mose;  very  rarely  the  third  joint  is  not  flattened,  and  is  provided  .it 
the  tip  with  a  thickened  stj'le.  Eyes  large,  bare  or  pilose,  in  the  male 
usually  contiguous  between  the  base  of  the  antennie  and  ocelli.  Ocelli 
always  present.  Thorax  comparatively  large  and  robust,  moderately 
arched  above  ;  scutellum  large,  usually  convex,  often  translucent,  rarely 
with  spines  on  its  border.  Tegulae  of  moderate  size.  Abdomen  com- 
posed of  five  or  six  visible  segments,  rarely  with  only  four.  Hj'popy 
gium  usually  not  prominent.  Shape  of  the  abdomen  variable;  slender, 
linear,  clubbed,  short,  oval,  and  all  intermediate  forms.  Legs  usually 
weak,  sometimes  strong;  the  hind  femora  not  infrequently  moderately 
or  much  thickened,  the  hind  tibia;  not  rarely  arcuated  and  compressed, 
metatarsi  rather  long,  coxie  short ;  the  hind  coxa*,  femora,  and  tibia-. 
more  especially  in  the  male,  in  not  a  few  species,  armed  with  spurs,  pro 
tuberances,  or  spines;  the  front  and  middle  tibia'  and  tarsi  rarely  flat- 
tened, or  with  structural  variation.    Macrochaette  rarely  present  in  any 

*  Soiiietimos  absent  in  Chri/HOftasfer,    VoluccUo,  etc 


JM. 

leiitly  with 
a  aiul  Pter 


SYNOPSIS    OF    NORTH    AMERICAN    SYKPIIIIU: 


XXVII 


£  head,  sec- 

>r  crosK-vein 

tudinal  vein 

EKIA  Fabr. 

the  frontal 


"part  of  t\w  body;  the  bo<ly  {Generally  thinly  i)iloso  or  nearly  biire,  bur 
souietitnes  dothed  with  thick  pile.     VVinj^s  comparatively  Iar;;-e,  when 
,  at  rest  folded  tojiether  over  the  ab(h>iuen,  or  half  oi)en;  thii'd  louf-i 
|tndinal  vein  never  forked,  fre(|uently  with  a   more  or  less  deep  eiirva- 
Iture  on  the  outer  ]iait;  uuu'fjinal  eell  opened  or  closed,  the  fourth  vein 
-terminates  in  the  third  vein  at  or  before  the  tip:  neither  of  the  inter- 
calary veins  jjresent ;  anal  eell  always  closed  before  the  border  of  the 
wiufi';  anterior  cross-vein  before  or  beyond  the  middle  of  the  dis(!al  cell ; 
ht  ween  the  third  and  fourth   loiit/itndinal  reins  and  nearly  parallel  with 
itheiii  there  iv  a  false  or  .sinirimH  rein,  nearly  always  i)resent,  and  char- 
acteristic of  the  family. 


Unal  veins;* 
:  basal  eel  In 


I 


lower  parr, 
itely  broad, 
e  under  the 
ity  near  the 
ges,  iisuallv 
ral  openiii;: 
projectinji. 
me  jointed : 
eut.     Front 
!ss  elongate 
it,  appro  xi 
lly  of  varied 
►are  or  pin 
irovided  at 
in  the  luak' 
elli.    Ocelli 
moderately 
■cent,  rarely 
ioraen  com- 
Hypopy 
lie;  slender, 
iCgs  usually 
moderately 
lompressed. 
and  tibia', 
spurs,  pro 
rarely  flat- 
sent  in  any 


4 


I 


TABLK  FOR  THE  DETERMINATION  OF  GENERA. 

Anteniiio  witli  a,  teiiiiiaal  style 2 

Auteiiiiii'  with  a  dorsal  l)rist]e 3 

Autcniiii' cyliiHlrical,  tirst  two  Joints  t'loiifjate Ceria,  "jrii^ 

First  two  joints  short,  third  compressed  (plate  iv,  tiy.  14)       .     Pelecocera,  110 

Marj^inal  fell  of  the  wing  closed  and  petiolate 38 

Marginal  cell  open 4 

4. — Anterior  cross-vein  ot"  the  wing  distinctly  before  the  middle  of  the  diseiil  cell, 

nsii.iliy  rectangular 5 

Anterior  cross- vein  ending  near  or  beyond  the  middle  of  the  discal  cell  usually 

oblique        43 

*  5. — AnteniiiB  elongate 6 

Antennie  short • 11 

6. — Dorsum  of  thorax  without  yellow  lateral  stripes 7 

Dorsum  of  thorax  with  yellow  lateral  stripes;  large  sjjccies  (plate  i,  lig.  ')) 

Chrysotoxum.  K! 

7. — Face  rounded,  pilose,  not  tnbercnlate,  oral  margin  not  ]irojectiug    ....     8 

Face  not  evenly  arched  ;  tnberculate,  or  the  oral  margin  projecting     .     .     .     9 

8. — Large  species;  scntellnm  llottened,  usually  with  spines  or  tubercles;  a  stumj* 

of  vein  in  the  first  ])osterior  cell  from  the  third  longitudinal  vein  (jilate  i, 

figs.  l-;i) Microdon,  :? 

Small  species;  scntellnm  without  points;   no  such  projecting  sttinij)  (plate  ii, 

tig.  1) Pipiza,  22 

9. — Body  clothiMl  with  sparse  tomentuni ;  all  the  femora  thickened  and  with  a  row 

of  short  spines  below  (see.  also,  J/v((»/ey)/rt  s/riflff/a/rt)     ,     .     Lepromyia,  :<1 

Body  not  toinentose  ;  ;ill  tlu' femora  not  thickened  and  not  with  spines  below 

lO 

lO.— Face  tubennilate  below,  partly  or  wholly  yellow  :  cpisloma  receding;  fa<;(i  and 

front  not  wrinkled  (plate  i,  ligs.  7-i.t)       Paragus,  17 

Epistoma  projecting ;  front  and  face   with  transver.se  wrinkles  (plate    ii,  tigs. 

G-9) Chrysogaster,  :il 

11.— Face  black  in  ground  color 12 

Face  more  or  less  yellow  in  ground  color 20 

12. — AbdoUKMi  with  only  four  visible  segments;  first  two  joints  of  thi'  antennie  very 
short,  third  large,  8ub<inadrate,  w'ith  a  short,  subterminal  arista  (plat<^  i. 

lig.  10) Nausigaster.  21 

Abdomen  with  more  than  four  visible  segments 13 

13. — Hind  femorn  distinctly  thickened 14 

Hind  femora  but  little  or  not  at  all  thickened 15 


XXVIII    ium,i:ti\  .u,   ixited  states  national  MUsi;rM. 


14.  —  Sciiiclliiiii  iiiiMHiiiiliy  l.'iijic  iicjirly  si|iiaic:  innlis  (licli(t|itic  (])lati'  iv.  li;:.  M) 

Chalcomyia,  1','t; 

Sciiti'llii:a  not  iiiiUMiiiilly  larjfo,  ronsidfraltly  liroailcr  at   the  Iimm-;  males  li(>lo|i- 

lie  and  wi'lia  facial  tiiltort'lc  (plati' v,  li^.s.  1-'^;       .     .     .     Myiolepta.  I'.'T 

15.--L|iiNiiiiii:i  ini.jcci  iiijr  I  small  lilark  .s|iccic.s IG 

Face  liilM-rciilaic,  the  oral  maij^iii  not  iu'dJiMliii;^ 17 

r'acc  I'oiiiiilcil,  ]iil(isc,  not  tiil)ciciilaic,  the  (ir.il  mar;;iii  not  inojci  (iiiM-  (plate  ii. 
li;,',s.  2-')) Pipiza.  •-",' 

16.  —  Front   in  (imalc,  and  llic  lace   in   liotli  sexes  usually,  willi  liaiisv  eise  \vi  Inkli  > 

(plate  ii,  Ii;;.  lO) Chrysogaster,  .'A 

I'ace  and  I'lont  not  wiink  ed;   Caei'  pilose,  willioiii  lulienle  .     Psilota,  ^d 

17.  —  Metallic  ^Teen,  metallie  ;;ieen  and  lda<k,  or  l)lacl.  species;  al)dom<ii  oval,  ne\  ci 

Willi  entire  sliininj;  cidss-liands  (plate  iii,  li;;s.  l-.'i)      ,     .     .     Chilosia,  11- 

Black  Willi  more  or  less  meiallie  ;;iecn  or  1)1  lie,  Willi  yellow  or  yellowisli  aiidoiii' 

iiial  iii:irkiii;4s,  or  if  not .  at  least  wil  li  cut  ire  ^liiniii;^  (  ros.^-l>allds  ;  alxloiiien 

ii.siially  elon;;ate 18 

18. — A\'iii};.s  not    lony;er   ilian    the   ahdoiniii  :    oielhir   tnherele    lar;;e:  ahdomiMi    de- 
pressed, loiii;  ellipl  i<'al,  Honii'W  hat  narrowed   toward  the   hase,  the   li;;litei 
!narkiii;is  t'errii;;iiii>nK  or  orani^e-yellow  (plate  iii,  A'^.  l:i)      PyropliEeiia,  Til 
Wines  loii;;cr  tli.'in  the  alMlomeii,  usually  iikmc  slender  species,  ahdoniiiial  eros> 
liand.s  yellow  or  ;;reenish  yellow,  or  sometimes  shiiiin;;'  metallic       .     .     19 
19.— i'lont  tiliiie,  distall\,  and  tar.si  of  the  male  dililled,  those  of  the  female  a  littli 

widened  (idate  iii,  li^s.  K'-l-J) Platychiriis.  .M 

Front  tilda' and  till --i  slender  in  hot  li  ."^exes Melanostonia,  H 

20. — Doisiim  of  thorax  with  yellow  lateral  stripes 29 

DiHsiim  of  thorax  not  with  yellow  lateral  stripes 21 

21. — Ahdoinen  narrowed  toward  the  hase,  in  outline  eliih  shaped  or  sp.it iilate    .     22 

Al)domen  oval  or  slender,  not  s|iatiiliite  or  cliili-shaped 24 

22 — Hind  femora  Nieiioer;  ahdfeiien  e!ciii;i.'iie,  .--lender  toward  the  hase;  front  of  \'v- 

iiial    lone-,  narrow  ah"ve(plale  iv.  ti^fs.  7-'.)) Baccha,  I  h 

Hind  femor.i  thickened 23 

23.  —  Fijistoina   jiiodiKed   anterioii\,    in   prolile  deeply  concave  from  aiitelime  to  ora! 

m;ir;;iii ;  third  Joint  of  aiiteiuM'  ro  undid  ( plate  iv,  fij^s.  11,  l-.i  Sphegina,    II: 

Ei)iHf<ima  jirodiiced  more  (lownward,  in  iimlile  jfcnt  ly  concive ;  third  joint  n; 

anteniKe  not  ronnde.i  (]date  iv,  liy.   10) Neoascia,  IT 

24. — Alxlomen  with  delinile  yellow  cross-hands,  interrnjited  or  1  utile   ....     25 

Ahdoinen  not  with  dejinite  yellow  cross-hands 32 

25.  —  Hind  femora  exlr.'icn'dinarily  thickened Syritta,  •-.i 

lliml  femor,!  slender 26 

26. — Sixth  ahdominal  sejrmcnt  in   the  male  as  loiijr  jis  the  two  preceding;  toirelhei 
cylindrical  (plate  iii,  tin'.  11 1 :   lifih  s<'i.';men1    in  the  female  on<'-hall  as  loii. 

as  tin-  precedin;; Enpeodes,  t- 

Sixth  see;menl  not  peculiar;   ihc  tilth  seeincnt  in  tli(!ieni.ile  tmc-ihird  or  oik 

t'onrth  as  loii^  as  the  jirccedin;;- 2'! 

27.  —  I'rolil   V  cry  ci.ii\  c\  ;   eyes  of  male  wit  h   an  area  of  enlarged    facets  ahove  (pl.il' 

iv,  lit;-.  1) Catabomba.  i'. 

front  not  remarkahl,\'  convex 28 

20.  —  I'll  ill!  loiiu'it  nilinai  \ein  with  a   dist  iucl    cnr\  al  lire   into  l  he  lir;i|  posterior  cell 

ihiid  joiiii  of  aiileiiiiie  elom^ale  oval  (plate  i\',  liji'.  4)    ....     Didea.  -: 

Third  lonjiitudidai  vein  stiaicjht  or  ;;eiii  ly  cm  vcd        Syrphus,  ii' 

29.  —  L  )orsinii  o|' I  liorax  wit  h  a  inedi.in  cinereous  line Mesogiapta,  '. ' 

Dor.'Viiii  nilhont  such  line         3C 

30.  --1\\ cs  ot'  male  with  ;in   area   of  enlaiiicd  t'a(els  al>ove;   fourth  sei,niii  ill  of  ahdi 

liicii  with  two  incdiaii  \e!low  --iripes  an.l  ai.  oliliqiie  side  spot 

Ailograpta,  '.' 


i:v 


31. 

-F., 

lai 

32 

-Ah< 

Thi 

83 

dlii 

Mil 

84. 

-Spe 

Ula 

85. --Sell 


86. 
87. 
88. 
89 
40. 

♦1 
42. 

43. 
44 
45. 

46. 

*'• 

#8 
49. 
80. 


-Fa. 

Fac 
-Kpi 

Kjii 
-Thi 

Thii 
-Alls 

Ari.- 
-Kin 

lliii 
-  Fioi 

I'roi 
-Tho: 

Thoi 

-Arts' 
Aris 

-Thii 
Thic 

-Thir 

Thir 

-F,ir( 
F  KV 

-Tlioi 

Sent 

Tiiii 

Thir 

-Thic 

Tiiiii 

-IlilKi 

liini] 


I'M. 

iv.  n-.  14) 
ilcomyia,  I'-itl 

mules  liiii(>|)-     81. 
[yiolepta.  1,'T 
.     ...     16     82, 
.     .     .     .     17     ■ 

tin;;-  (  pliili'  ii. 

Pipiza.  ,;•.'     83 
.t'l'st'  wiliiUli  > 
ysogaBtei-,  .U      84. 
.     Psilota,  :ii' 

(11  <iv;il.  lli'\il 

Chilobia,  '■>     85. 

liwi.sll   i|ll<l<llll 

imI.s;  alitloiiii'ii 
.  ...  18 
iilxluiiii'ii  (lc '     86. 

sc,  llic   li;;Iltil 
yrophaena,  .'il     87. 
ildiiiinal  I  ri).-^> 
lie       .     .     19     38. 
I'oiniilc  a  lit  til 
latychiruB,  .M^     gg, 
lanostoma,  V 
.     ...     29     40. 

.      .      .      .      21  ; 
Mtiilali'    .     22 

.     .     .     .     24  |l. 

ic ;  IVoiit  ol"  If-  M 

Baccha,  lit  | 

.     ...     23     42, 
iteniia;  ti>  iil;i 
phegina,    II ; 
tliinl  joint  c: 
Neoascia,  1!      43, 
...     25 
...     32     44 
Syritta,  '-.i 
...     26     45 
liiiL;;  to^^ci Iiii 
r-liall   as  Ion.. 
Enpeodes.  (      46 
lliinl  or  oiii 
...     2: 
aliovi'  (|ila!'     4"^ 
atabomba.  i- 
...      28      ■; 
(islcrior  ccli      J|q 

Didca,  '1    m 
Syrphus,  *<•    is 
e.-iogiapta,  '. "    * 

.     .     .     3C    80 
lilt  111  of  alidi 
t. 
ilograpta,  '.' 


SYNOPSIS    OF    NORTH    AMEHICAN    SYRI'lIIUyK.  XXIX 

KycH  of  iiialf  not  with  an  iura  of  cnlarjicd  facets  aliovr  ;   fourth  iilMloniin!>l  st-ij- 
iiDMit  not  so  iiiai'kol 31 

—  I'iici- project iny  lirlow  ;  .slender  .species  (plate  iv,  Ii;;.  lii)  .    Spliaeroplioiia.  HU 
I'ace  lecediii!.;  Iielow  ;  adoiiien  oval,  at  least  not  slender       Xauthogramma,  '.M 

—  .Midonicn  oval,  hlack,  liasal  i>orlioii   I ij^lit -colored  ;  thickly  pilose  specii's  (plate 

iii.  Ii;r.  (■,) Leucozoua,  (il 

'I'liiiily  pilose  species,  not  so  marked 33 

-Hind  feinoi-.i  lliickeiied 34 

lliiid  t'i'iiiora  slender        37 

—  Species  \vlioll.\   or  <liiellv  reddish  oi   llltescellt      .      .      .      .  • 36 

JUack  spei'ies,  soiiiel  iiiics  with   liileoiis  spots  on    lace,   hniiieii,    liasal   aii;;lrs  of 

.•ilidonieii,  etc       35 

—  .Sciilciliiiu  iiniisiiall.s   laii;e,  inarly  stpuire  iiiontliin  ;   males  dicliopt  ic 

Chalcomyia.  IJ<> 

.■sciitellnm  not   nnnsiially  larnf,  considerahly  liroailcr  .at  the  liase;  <'yes  of  m,".le 

lioli.pt ic Myiolepta,  Vi7 

—  I'ace  carinate  ;  alidomcn  oval  (plate  v,  lilt's.  .'i-T ) Brachyopa,  1">1 

I'ace  jirodlieed,  (d)tilsely  tilherciilate  (plate  \.  Iii;-.   1)       .     .     Ellgeiiiamyia.  MO 

—  l",))istoiii.'i  itroiliiced  into  a  loii^  l)orr('eled  snout  (iihito  v,  li^.  I!)  .     Rhingia.  I'Jl* 
l",))istoma  not  at  all  jirodiiced.     (See,  also,  llacrha,  IK!.)  ....     Cliilosia.  '-'S 

— Third  lon;iitudiiial  vein  heiit  deeply  into  tli(^  tirst  posterior  cell       ....     40 
Third  vein  not  deeply  lieiit  into  the  lirst  posterior  cell  ;  antenna'  el(Mi;,'ate  ,     39 

-.\tistii  featliery  pliimo.se  (platt<  vi) Volucella,  Kll 

Arista  very  densely  i)liimose,  apjieariii.t;  like  a  solid  mass  Copestylum.  I."il 

—  Hind  feiiKU'a  wiili  sharp  tooih-liki'  ]trojection   Iielow  near  the  outer  end  :   laii^e 

species  (plate  xii.  (i;;,  "J)       .     .  Mile.sia.  'Jo I 

Hind  femora  without  tooth-like  project  ion  Iielow 41 

—  I'lontal  trianj;'*-' of  male  stroii;jly  protuticrant  (plate  viii,  li^.  1^) 

Doliosyiphus,  1T.~ 

Fronfal  triangle  not  protuherant 42 

— Thora.K  with  distinct  yi  How  niarkiii;;s :   femora  thiidvi'iied:   hyiiopyuiimi   lari;e 

()ilate  vii,  liii.  1) Pteroptila,  IT'.» 

Thorax  without  distinct  ycllou' markings  ;  hind  leiiioi'a  occasionally  t  hickened  : 
liy]iopy;;iiim  not  prominent ErLstalis.  I.i-^ 

—  .\rista  plumose  (jihitc^  vii,  li^s.  ",'-.)) 44 

.\risla  hart)  or  iniliesceiit 45 

—  riiinly  ]iiloM',  aliilotiien  with  ytdlow  hands Sericomyia,  l."i:! 

'I'hickly  ]>iIose,  ahiliimen  without  yi'llow Arctophila,  l.'>7 

— 'I'liird   lon^itiitlinal  vein   bent  ileei»ly  into  tlio  lirst   iiosteiioi' cidl  :  hind  leiiiora 

thickenetl  46 

Third  vein  only  ;;i'iil  ly  ciirvetl 51 

-i'.ii-c  with  a  sharp  loii.u;itudinal  ritl;;-e  in  the  midille  :   hi  ml  renioia  with  an  an;;ii- 

lar  prol  ulierance  lich^w   near  outer  end Tropidia.  ■.'Hii 

I' ICC  ;  uliertiilate  or  archetl,  not  carinate 47 

-Iliiii.ix  and  sciiteliliiu  \t'ry  deiisi.ly  poliinose  aho\f  (pl.ite  viii,  lii;.  '.ii. 

PteialJafitos.  I'.i- 
.■siutellilin  not  ileiisely  ]M)llinose  aliove 40 

—  Tiiiitl  joini  of  aiileiina'  hroatl.  thor.ax  iitit  vitiate 49 

'iliird  joint  ov.il;   thorax  usually  vil  l.ittr  al")ve Helcpliilna.  l-i! 

— Thickly  pilost; Mallota.  •Jiii 

Tliinly  pilose 50 

—  llinil  tiliia'  of  ni.'ilc  with  an  internal  niedian  spur  (plaie  \  lii,  li.Lt    1-) 

Teiichocnemis,  !',);• 
lliml  tibia'  of  mule  ntit  with  an  internal  mtttlian  spur  (plate  ix,  II.l;.  I  1 

Tiiodoata.  'Ji:,'. 


i 


XXX        niTLF.iyriN  :(i,  unitcd  states  natioxai.  mi'si:i:m. 

51--lliiiil  fi'inoni  tliicloMicd,  witli  ii  hiliil  simr  l)(:l(»\v  on  (inter  cinl,  dilate  xi,  liji.  1). 

Senogaster,  'j:!>^ 

Hind  t'cniiiiM  not  with  a  liilld  N|int'  liclciw 52 

52.— SlfiidiT  s]n'(Mi's,  aliddiiicn  naniiwcd  (111  liasiil  portion Baccba,  llii 

Alidonii-n  in  no  \v\sv.  cliib-Hliaiird  or  narrowed  liaxally        S3 

53    -'I'liorax  Willi  distinct  yellow  niarliin;is  otiier  tiian  on  the  Imnieii        ...     62 

Thorax  not  willi  distinct  yellow  iiiarkin;;s  olliei-  tlian  rarely  on  tliH  linnieri    54 

54.  —  I'.ice  traiisvcrHcly  arched  or  carinate,  not  iiroduced,  not  tnlierenluto  ;  tilidouien 

more  or  less  elon;;ate  ami  nearly  hare         55 

Mor<!  or  less  thickly  jiilose  8|iecies,  otten  Iarj;e 57 

55.— Hind  fenioiii  cxtraonlinarily  thickened;  anterior  cross-vein  rectani^nlar  dilate 

xii,lig.  1) Syritta,  ~':{;t 

Hind  f(!niora  inorcMir  h'H.s  thickened  ;  cross-vein  obli(|ne 56 

56.  — I'ace  sharply  carinate  (plate  ix,  lij;.  •,') Tropidla, 'JOtl 

l"ac«!  transversely  arched  (plate  ix,  lij^s.  i>-6) Xylota,  '2iA 

57.  -Sculellnni,  niarj^in  of  the  thorax,  and  the  pleura'  with  bristly  hairs  (plate  xi,  (ij;. 

r>) Chrysocblamys,  '240 

Thorax  wholly  without  bristles        58 

58. — Taco  short,  not  produced,  concave  IVoin  anteniiie  to  tip,  imt  tnbercnlate ;  hind 

t'enioia  thickened 59 

Face  jiroduccd,  lonj;er  than  the  front 60 

59.— Abdomen  elonj^ato BrachypalpuB,  M'il 

Abdomen  very  broatl,  thorax  densely  jiilose,  very  lar;.;e  species  (plate  x,  lij;.  7) 

Pocota,  ii-2ii 

60.— Faco  produced  forward,  pointed,  concave  from  antenna;  to  tip,  not  tiibereulate, 

sub-carinate  ;  hiiul  femora  thickened  (plate  x.  Iii;s.  4-(t)     .     Crioprora,  :i!lT 

Face  not  evenly  concave,  tnbercnlate  or  convi'X 61 

61. — 'I'liird  joint  of  niiteuine  jiroduccd  above  into  a  coiiii'al  process,  terminating  in 

the  thickened  arista  (plate  xi,  lij;.  "J) Merapioidus, '.J4:' 

Third, joint  of  antenme  obliiim-ly  oval :  hind  femora  rarely  thickened*     (plates 

ix,  x) Criorhina,  "JCH 

62.  — Mind  femora  with  a  conical,  toofh-Iike  )irutnberancc  below,  near  the  end  (plate 

xii,  fiKs.  Ii-')) Spilomyia,  "J-'l 

Hind  femora  without  smdi  protnberance 63 

63. — Antenna'  insc^rted  low  down,  near  the  middle  of  tlie  head   in   iirotilc;  face  nor 

lonner  than  the  front  (\ilatc  xii,  tigs.  (i-T) Temiiostoma,  24'.i 

Antcnme  situated  hi};li  up,  on  a  conical  jii'ocess,  front  short,  face  much  produced 
downward  ;  antenna;  loni;  or  short  (plate  xii,  lijj.  8)      .     Sphecomyia,  '2iiS 

*  If  thinly  jiilose,  with  the  aluhinKMi  nearly  bare,  and  the  bind  femora  thickened, 
see  Xyluta  tiibminn,  p.  '2^7y. 


$ 


I 


1 


:i;m. 

it(>  xi,  Wii.  1). 
enogaster,  'j:!8 

....     52 
Baccha,  llii 

....     53 

...     62 

liH  liuiiu'ii    54 

lute ;  iilidomt'ii 

....     55 

....     57 

iiii<riiliir  (]ilatt' 

Syritta,  ~':tit 

....     56 

Tropidia,  "it))  I 
.  .Xylota,  22-i 
•.s(pIatoxi,  fiK. 
ochlamys,  240 

....  58 
crciiliitt;;  liiud 

....     59 

....  60 
hypalpus,  '>i'il 
platii  X,  lijr.  7) 
Pocota,  t,>:ii) 
>t  lubercnlatc, 
3rioprora,  217 

.  ...  61 
erininatiiif^  in 
rapioidus,  24;i 
t'licd*  (jilatcs 
Criorhina,  2C<i 
llu)  ciul  (i)lalf 
ipilomyia,  221 

.  ...  63 
otilc :  face  not 
uiostoina,  24<,i 
mull  |)r()(l(i(;c'(l 
lecomyia,  2."j8 


■ 


ora  lliifkciicd, 


P-A.RT   II. 


DESCRIPTIONS. 


Ij 


■Wlll^is. 


! 


i 


PART  II.-DESCRIPTIONS. 


MICKODON. 

ilioodon  Meigpii,  in  lUincr'n  Mii','iiziiu',  ii,  'iT'i,  1803. 
Aphriih  LatrtMllf,  IliHt.  \at.  Crust,  et  Inn.,  xiv,  1804. 
f''»Y(/oj>/ii/a  Wit'di'iimim.  Aiiss.  Z\v.  Ins.,  11,71),  IBItO. 
^)\mrr(lKpU'S^'^\\\u\n,  Knt.  Ma^;.,  v,  :!72,  IHll". 
McKophila  Walker,  List   -tc,  iv,  ll.%7,  1H4<J. 
I' liriMtvn  Walker,  InHcctii  SaunderH.,  '217,  ISSfi. 

Rather  largo,  nearly  bare  .species,  n.sually  abort,  thickset,  with  short 
iriiijis.  llea«l  tlatteiied,  broad  ;  tli(!  face  rounded,  pih)se,  not  de-scendinp 
naucli  below  the  eyes.  Antenna^  porrect,  approximate  at  their  base,elon- 
gate,  diver};ent  on  outer  part;  first  Joint  elonpite,  slender  ;  second  Joint 
the  .shortest ;  third  spindle-shaped,  as  long  or  longer  than  the  first ;  arista 
tli(»rt,  ba.sal,  bare.  Eyes  usually  bare,  rarely  pilo.se,  broadly  separated 
in  the  male,  but  less  .so  than  in  the  female.  Thora.v  short,  broad,  con- 
vex. Scutellum  large,  flat  or  gently  convex,  often  with  a  spine  or  tu- 
bercle on  each  posterior  angle.  Abdomen  usually  short  and  broad, 
tnrned  downward,  very  convex,  nearly  bare.  Legs  short,  rather  stout, 
tibiae  usually  .somewhat  dilated;  tarsi  more  or  le.ss  dilateil ;  the  meta- 
tarsi elongated,  especially  the  hind  pair,  which  are  sometimes  extra- 
ordinarily dilated.  VVing.«  short,  snuill;  third  vein  nearly  straight,  first 
posterior  cell  long  i)etiohite,  with  a  stump  of  a  vein  i)roJecting  into  it 
from  the  third  vein,  near  its  middle;  last  section  of  fourth  vein,  and 
the  veiii  closing  the  discal  cell,  often  with  a  stump  of  a  vein  on  the 
inner  side.    Type  of  genus  M.  mntabilis  Linu^,  Europe. 

TABLE  OF  SPPXIES. 

1.— SltMiiler,  elong.ate  species;  anteunie  short 2 

short,  thick-set  species 3 

3. — Tliiril  joint  of  the  antennrp  a  littU^  shorter  than  the  tirst  two  together  ;  wings 

distinctly  fasciate       baliopterus 

i'lii id  joint  a  little  longer  than  the  lirst  two  together,  wiug.s  indistinctly  fas- 
ciate        coarctatua 

3,— Hind  metatarsi  not,  or  bnt  slightly,  iucra.ssate 4 

HIikI  metatarsi  strongly  incrassate  in  the  niah' 5 

4,— Posterior  part  of  the  abdomen  bright 'ivange-yellow pulcher 

Abdomen  without  orange-yellow tristia 

5. — Third  joint  of  the  antenna' longer  than  the  lirst fuacipenuia 

■%    Third  joint  not  longer  than  the  lirst globosua 

For  other  .species  see  descriptions. 


R 


'   '. 


4  BILLETIN    31,    UNITED    STATE8    NATIONAL    MUSEUM. 

Microdon fuscipeunis.     (Plait'  I,  lij(s.  l.lrt.) 

(Cratojilnid  futcipennii  Miictiiiart,  Hist.  \i^u  Dipt..!,  •i'^8,  3. 
Microdon  Agapmor  Walker,  List.  (■t(.',,  iii,r):?i». 
J/t80^>//i/a/H»cy>e«/iis  Walker,  List,  etc.,  iv,  1157. 

Habiiat.—Yh'f^unw,  Floridii!,*  Texas  (O.  S.). 

$  .  Lcngtli,  0  to  8""".  Heiul  ftTiugiiions  red,  clotlietl  with  yellowish 
white  i>il(' ;  in  prolile  yeiitly  j^ibbose  on  the  lower  jKirt  of  the  lace. 
Front  broad,  the  distance  from  tlu>  ocelli  to  antenine  a  little  less  than 
the  least  distance  between  the  eyes  ;  ocelli  approximate.  Antenna-i  red, 
elongate,  the  tirst  Joint  considerably  shorter  than  the  two  following  to- 
getlier;  second  joint  short;  third  joint  a  little  longer  than  the  first,  ob- 
tuse at  the  tip,  brownish  on  the  distal  j)art.  Thorax  red,  the  dorsum 
with  three  broad  black  stripes,  tiie  lateral  ones  abbreviated  in  front ; 
clotlied  with  short,  Mglit  yellow  i)ile.  S(!Utellnm  large,  plane,  trapezoi- 
dal in  shape,  the  length  of  the  distal  border  not  as  great  as  the  sides; 
very  distinctly  emarginate,  the  i)ile  rather  shorter  than  on  the  thorax. 
Abdomen  sluu't,  broad,  j'lobose,  brownish  red,  the  ])ile  siiort,  light  yel- 
low. Legs  red,  the  femora,  except  the  tip,  and  sometimes  a  ring  on  the 
tibia',  and  the  hind  metatarsi,  black  ;  hind  metatarsi  longer  than  the  re 
maiiiing  joints  together,  extraordinarily  thickened  and  dilated.  V/ing.s 
tinged  with  bhickish,  especially  in  front  and  along  the  cross-veins;  the 
sections  of  veins  at  outer  part  of  tirst  posterior  ami  discal  cells  nearly 
straight  .mkI  rectangular,  somewhat  deflected  inward. 

Tiiree  specimens,  Virginia  (T.  Pergande),  and  Florida  (Professor 
Kile> ). 

The  <!olor  probably  varies  more  or  less  from  red  to  brownish  red 
throughout.  I  am  not  at  all  certain  that  this  species  is  Macquart's 
Ceratophijia  fuscipeniiis,  as  there  is  a  distinct  emargination  on  the 
border  of  the  scutellnm,  the  absence  of  which  very  character  is  that 
upon  which  Mie  genus  Ccratoplujia  was  based. 

Microdon  globosua.     (Plate  I,  tig.  '2.) 

Mulio  globosHH  Fabriciiis,  .""yHt.  Aiitl.,  IH.'),  7. 

Microdon  i/lohnfiii»  Wiedeniauii,  Aiiss.  Z\v.  Ina.,  ii,  86,  11  (translation  from  Fabri- 

I'ins);  Paekanl,  (xuide,  etc.,  :{9S,  lij;.  17;  Lintner,  '2n<l  Rep.,  11(5,  fig.  24. 
Aphritis  ylohoniiaMiiciiiuivt ,  D'^^\.  Exot.,  ii,  "J,  13,  ."> ;  tab.  i,  lig.  4. 
Dimernnpis  j)oda<jra  Nt'\\]i\nu,  Ent.  Majj.,v,373. 

Habitat. — Atlantic  States  !,  Michigan  (Lintner). 
^,9.  Length,  S  to  1(>""".  Antenme  red,  somewhat  blackish  at  the 
tip,  the  tirst  joint  a  little  shorter  than  the  two  following  together; 
second  joint  not  half  as  long  as  third;  third  joint  .  ^nted  at  the  tip 
Face  thickly  clothed  with  white  i»ile;  lY:;nt  in  the  male  narrowed  neai 
its  middle  so  that  the  distance  from  the  ocelli  to  the  antenna',  is  about  #ons 
twice  the  width;  ocelli  apj)r(?ximate ;  front  in  female  as  wide  as  the 
distance  from  ocelli  to  the  antenme.  The  color  of  the  head  is  red;  in 
profile  the  face  is  nearly  paiallel   with  the  border  of  the  eyes.    Eyesi 


*  Habitats  followed  by  an  !  are  given  from  specimens  examined. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIID.E. 


li  yellowish 
»t'  the  iace. 
le  less  than 
itenna^  red, 
)lk)\viii}jt  to- 
he  first,  oh- 
the  dorsum 
(I  ill  front ; 
le,  trapezoi- 
s  the  sidt'S ; 

the  thorax. 
i-t,  light  yel- 

ring"  on  the 
than  the  re 
ed.     Wings 
s-veins;  the 

eells  nearly 

a  (Professor 

rownish  red 
^Macquart's 

tion  on  the 
icter  is  that 


on  from  Fabri- 
llli,  lig.  24 . 


iliish  at  the 
ig  together: 

at  the  tip 
i-rowed  near 
ma'  is  about 
wide  as  tlio 

is  red ;  in 
eyes.    Eyes 


ued. 


[bare.     Thorax  red,  with  three  broad,  indistinct,  blackish  strii)es.     Sen- 

[tellnin  large,  plane,  trapezoidal  in  shape,  the  three  sides  nearly  equal ; 

[wholly  without  spines  or  tubercles  ;  pile  short,  reddish,  not  longer  than 

'on  the  dorsum  of  the  thorax.     Abdomen  very  short  and  broad,  globose, 

brownish-red,  the  pile  very  short  and  whitish.     Legs  red,  the  femora 

more  or  less  blackish  ;  hind  metatarsi  longer  than  the  three  following 

joints  together,  very  much  dilated  in  the  male.     Wings  brown  along 

tiie  front  part  and  along  the  veins  of  the  posterior  part ;  veins  at  the 

outer  part  of  the  first  posterior  cell  and  discal  cell  nearly  rectangular, 

not  rounded  on  the  posterior  angles. 

Numerous  specimens. 

Microdon  pulcher,  n.  sp. 
Habitat. — Saint  Domingo !. 

9 .  Length,  12'"™.  Eys  bare.  Face  nearly  parallel  iu  profile  with 
the  border  of  the  eyes,  shinii:g  black  with  a  purple  reflection,  clothed 
with  not  very  abundant  white  pile.  Antennae  black,  the  first  joint  not 
quite  so  long  as  the  two  others  together,  second  joint  short,  not  a  fourth 
as  long  as  tiie  third  ;  arista  shorter  than  the  joint.  Front  deep  shining 
purplish  black,  with  short  black  [tile.  Thorax  deep  shining  black,  with 
a  jmrple  or  violet  reflection  ;  pile  short,  black.  Scutellum  transverse, 
pot  half  as  long  as  broad,  spines  small  and  inconspicuous,  remote 
from  each  other ;  pile  longer  than  on  the  dorsum  of  the  thorax,  nearly 
white.  The  color  of  scutellum  and  the  abdomen  bright  purple;  third 
segment  of  the  latter  on  the  sides  rather  narrowly,  fourth  segment 
broadly,  fifth  segment  wholly,  orange  yellow,  and  clothed  with  the 
same  colored  pile;  elsewhere  tlie  abdomen  is  clothed  only  with  short 
black  pile.  Legs  black,  the  last  joint  of  all  the  tarsi  yellowish  red  ;  all 
the  tarsi  flattened  transversely,  the  posterior  metatarsi  only  a  little 
thicker.  Wings  dark  brown,  the  interior  of  outer  cells  subhyaline ;  the 
last  section  ot  tiie  veins  at  outer  part  of  the  first  posterior  and  discal 
cells  angulated  and  with  stumps  of  veins. 

Two  specimens,  Saint  Domingo  (G.  F.  Frazar). 

Microdou  baliopterus.     (riato  I,  lif?.  4.) 

Alicrodoii  bdlioplerKU  Loew,  Ceiitur.,  x,  56. 

lla bi tat. —TiiXi\»  (Lw.)  !. 

6,9.  Belongs  aiiiong  tht;  species  with  slender  body  and  short 
anteniiie ;  fuscous  bron/e,  modeiiitely  shining ;  front,  thorax,  and  scu- 
^llum  cu[»reous  sliining,  abdomen  greenish  bronze  in  color,  toward  the 
iides  becoming  coiipery ;  antenuie  and  legs  testaceous,  third  joint  of 
the  former,  and  the  basal  half  of  the  femora  nearly  wholly  black  fus- 
ions; wings  hyaline,  veins  usually  broadly  clouded  with  fuscous  black, 
length  (>f  body,  8  to  9""";  of  wings,  (j  to  7""". 

Kelated  to  M.ioan't<(tiiN,  and  Icvtus;  fuscous  bronze,  moderately  shin- 
ing.    Front  resplendent  coppery,  clothed  with  light  yellow  pile;  lace 
ind  occiput  white  pubescent.     Eyes  sub-uu<le.     Auteiinte  short,  saturate 


mmam 


6  BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 

reddish ;  third  joiut  a  little  shorter  than  the  first  two  together,  except 
the  base,  black.  Thorax  coppery -shining,  the  purplish  stripes  of  the 
dorsntn  sub-opaque,  pile  of  the  dorsum  sub-aureous,  of  the  pleurae  white. 
Scutellum  coppery  shining,  and  sub-aureous  pubescent.  Color  of  the 
abdomen  bronze-greenish,  near  the  lateral  margin  in  the  male  more  obso- 
letely,  in  the  female  more  distinctly,  coppery,  margin  of  the  last  segment 
nearly  luteous.  Abdomeii  subaureous  pubescent,  on  the  sides  near  the 
base  with  white  pile,  near  the  tij)  with  black  pile.  Legs  saturate  testa- 
ceous or  fuscous  red ;  basal  half  of  the  femora  always  for  the  great 
part  fuscous  black.  Tarsi  sometimes  fuscous.  Wings  cinereous  hya- 
line, transverse  veins  and  the  anastomoses  broadly  clouded  with  fus- 
cous black. 

Translation  from  original,  compared  with  the  types  in  the  Museum  of 
Comparative  Zoology. 

Microdon  coaxctatus. 

Micyodon  coarr' itan  hoew,  Ceutur.,  v, 47. 

Habitat. — District  of  Columbia  (Lw.) !. 

S  ,  9  .  Slender,  steel  green,  moderately  shining,  eyes  subnude,  front 
and  face  narrow,  ocelli  rcwiote  from  the  vertex,  antennae  short,  black, 
margin  of  the  second  abdominal  segment  tumid.  Length  of  body  7  to 
8""»,  of  wings  G""". 

Slender,  ste*il  griicu,  moderately  shining,  white  pul)escent.  Front  of 
equal  width,  in  the  female  a  little  broader  than  in  the  male,  ocelli  re- 
mote from  the  vertex.  Antennaj  black,  short,  third  joint  a  little  longer 
than  the  first  two  together.  Dorsum  of  thorax  bronze  green,  very  1  ightl y 
punctulate  and  transversely  acicnlate,  with  four  obscure  cop]>ery  stripes. 
Scutellum  greenish  black,  the  apex  emarginate  and  on  each  side  pro- 
vided with  a  black  tooth.  Abdomen  in  the  male  cylindrical,  obtuse,  in 
the  female  acute ;  second  segment  a  little  broader  than  the  following, 
the  disk  dei)ressed.  with  the  lateral  margins  somewhat  tumid.  Wing.s 
cinereous  hyaline,  the  transverse  veins  clouded  with  black,  posterior 
angle  of  the  first  posterior  and  discal  cells  rounded,  very  shortly  ap- 
pendiculate. 

Translation  from  the  original,  compared  with  the  two  type  specimens 
in  the  Museum  of  Comparative  Zoology. 

Microdon  tristia.    (Plato  I,  figs.  :5,3rt.) 

Microdon  Iriatifi  Loow,  Centnr.,  v,  45. 

Microdon  cothurnatum  Bigot,  Auii.  Soc.  Ent.  Fr.,  1883, 320  (var.). 

Habitat. — Virginia,  New  York,  and  northward  as  far  as  the  Mac- 
kenzie River  (O.  S.),  Connecticut,  Oregon  !. 

$  .  Black,  i)allidly  pilose,  the  antennie  long  and  fuscous  black,  front 
very  broad,  scutellum  bidentate,  ab<lomen  oblong-ovate,  the  penulti- 
ir  „e  seguieut  subecpial  to  the  two  preceding.  Length  of  body  9"'"',  ot 
the  wings  0""". 

Head  bronze  black,  clothed  with  yellowish  white  pile,  front  very 
broad,  of  equal  width.     AutenuiB  elongate,  black-fuscous,  first  joiut 


M. 


SYNOPSIS   OF   NORTH   AMEEICAN   SYRPHIDiE. 


ler,  except 
pes  of  the 
urae  white. 
)lor  of  the 
more  obso- 
st  segment 
es  near  the 
irate  testa - 
r  the  great 
sre'nis  hya- 
■d  with  fus- 

Museum  of 


•nude,  front 
hort,  black, 
»f  body  7  to 

t.  Front  of 
le,  ocelli  re- 
little  longer 
very  lightly 
pery  stripes, 
ch  side  pro- 

,  obtuse,  ill 
B  following, 
lid.  Wings 
k,  i)osterior 

shortly  ap- 

e  specimen!! 


ls  the  Mac- 
black,  front 
the  penulti- 
)ody  O"""',  ot 

,  front  very 
,  first  joint 


linear,  subequal  to  the  third,  testaceous  at  base.  Thorax  bronze  black, 
obsoletely  cupreous  lineate,  clothed  with  yellowish  pile.  Scutellum 
greenish  black,  white  pilose,  rather  plane,  with  the  apex  emarginate 
and  armed  on  each  side  with  a  minute  tooth  of  the  same  color.  Abdo- 
men oblong-ovate,  punctulate,  black,  the  penultimate  segment  subequal 
to  the  two  preceding  together,  with  the  base  and  lateral  margins  yel- 
low pilose,  and  with  the  pile  on  the  disk  so  arranged  that  a  broadly 
interrupted  fascia  ou  the  posterior  margin  of  the  third  segment,  two 
large  separated  spots  on  the  fourth  segment,  two  smaller  subcontiguous 
ones  on  the  fifth  segment,  clothed  with  white  pile,  are  apparent.  Ven- 
ter yellow  pilose,  black  piceous,  with  the  i)osterior  margin  of  each  seg- 
ment dilutely  yellowish.  Legs  black  piceous,  base  of  femora,  knees 
and  basal  half  of  hind  tibiae  dilutely  testaceous ;  tarsi  neither  dilated 
nor  incrassate.  Wings  cinereous,  clouds  of  the  transverse  veins  nar- 
rowly blackish,  posterior  angle  of  the  first  posterior  and  discal  cells 
rounded,  not  appendiculate. — Translation. 

There  is  a  considerable  variation  among  the  specimens  which  I  have 
•examined,  and  while,  from  an  examination  of  the  types  in  the  Loew  col- 
lection, I  do  not  believe  them  specifically  different,  I  deem  it  best  to  here 
:give  their  descriptions. 

S  ,9  .  Length,  7  to  10""".  Head  metallic,  shining  green;  face  nearly 
parallel  in  profile  with  the  border  of  the  eyes,  clothed  with  yelloviisli- 
•wbite  pile.  Front,  in  the  male,  with  a  distinct  transverse  groove,  in 
width  a  little  less  than  the  distance  from  the  ocelli  to  the  base  of  the 
antenna},  clothed  with  light-yellow  pile ;  in  the  female  the  front  is  of 
the  same  width  as  the  face,  and  the  transverse  depression  is  less  distinct. 
Antennae  black,  the  first  joint  reddish  at  the  base,  third  joint  obtuse 
at  tip,  not  as  long  as  the  first  joint.  Dorsum  of  thorax  in  the  male 
shining  brassy  green,  with  an  indistinct  median  stripe ;  in  the  female, 
more  greenish  blue;  clothed  with  moderately  long  and  abundant  whitish 
pile.  Scutellum  gently  convex,  with  an  acute  spine  on  each  posterior 
angle:  pile  of  the  same  color  as  on  the  dorsum  of  the  thorax,  a  little 
longer  and  more  abundant.  Tegulae  white,  with  white  pile  on  the  mar- 
:gin.  Abdomen  more  than  twice  as  long  as  wide,  bluish  green,  moder- 
ately shining,  clothed  with  yellowish-white  pile,  which  forms  an  indis- 
^tinct,  interrupted,  transverse  cross-band  on  the  posterior  part  of  the 
third  segment,  and  two  oblique  spots  on  the  fourth  segment.  Legs 
fblack ;  the  tibiae  clothed  with  white  pile ;  posterior  metatarsi  not  quite 
as  long  as  the  remaining  joints  together,  but  little  or  not  at  all  dilated. 
Wings  only  lightly  tinged  with  blackish;  the  outer  posterior  angles  of 
the  first  posterior  and  discal  cells  strongly  convex. 

Var.  rujicrua,  new. — A  single  male  specimen  from  Connecticut  seems 
to  show  a  specific  variation  from  the  foregoing,  but  as  one  specimen  is 
insufficient  to  decide  it,  I  will  here  give  the  differences.  The  face  is 
rather  more  projecting  in  profile  below ;  across  the  front  there  is  some 


1 


8 


BULLETIN   31,    UNITED   STATES   NATIONAL   MUSF'tm. 


1  »^- 

i 


t 

II  ; 


I     !1 


i     U 


IV. 


!!  i^ 


black  pile ;  the  tibise  and  tarsi  are  wholly  reddish-yellow ;  and  the  hind 
tibiae  and  metatarsi  seem  to  be  more  dilated. 

Var.  cothurnatns  Bigot. — Two  females  and  one  male  from  Mount 
Hood,  Oregon,  agree  very  closely  with  the  first  two  specimens,  but  the 
third  joint  of  the  antennae  is  acute,  the  spines  of  the  scutellum  are  very 
small,  nearly  obsolete;  and  the  tibiae  and  tarsi  are  wholly  reddish-yel- 
low. 

Miorodon  limbus,  n.  sp. 

Habitat— 'Flondsk  I 

9  .  Length,  9™"*.  Black,  moderately  shining.  Face  and  front  broad, 
parallel.  Face  clothed  on  the  sides  with  golden  pile,  in  the  middle 
chiefly  black.  Antennae  dark  biownish  red,  first  and  third  joints  of 
nearly  equal  length,  the  second  more  than  a  fourth  of  the  length  of  the 
third.  Front  with  only  a  little  golden  pile,  mostly  black,  short.  Dor- 
sum of  thorax  black,  with  slight  coppery  reflections,  nearly  bare.  Scu- 
tellum large,  with  two  large,  somewhat  approximated  spines.  Abdo- 
men broadly  ovate.  Mack,  but  little  shining,  the  second  segment  on  the 
sides  behind,  and  the  third  with  a  larger  oblique  spot  on  each  side, 
white  pubescent  or  pilose.  Legs  dark  red,  the  immediate  base  of  the 
femora  black,  very  short  pilose ;  tibiae  rather  stout,  and  gently  convex 
on  the  outer  side,  especially  the  hind  pair ;  hind  metatarsi  elongate, 
flattened,  not  dilated.  Wings  cinereous-hyaline  in  the  inner  part  of  the 
cells  ;  all  the  veins,  except  the  base  of  the  fourth  longitudinal,  with  a 
narrow,  very  distinct,  blackish  cloud  on  each  side,  those  of  the  last  vein 
separated  by  a  subhyaline  interval ;  outer  cross-vein  sinuous. 

One  specimen,  Florida  (National  Museum,  Professor  Riley's  collection). 

Miorodon,  ii.  sp. 
Habitat.— Mex\co  I 

$  .  Length,  10""".  A  single  imperfect  specimen  from  the  Isthmus  of 
Tehuan tepee,  in  the  National  Museum,  shows  such  remarkable  develop- 
ment of  the  hind  tibiae  that  I  mention  it  here  without  giving  it  a  name. 
It  is  yellowish  red  throughout,  the  dorsum  of  the  thorax  and  the  nieta- 
notum  black.  The  hind  tibiae  are  extraordinarily  dilated,  crescentric 
in  shape,  considerably  thickened,  and  with  a  dense  fringe  of  black  pile; 
the  hind,  metatarsi  are  also  dilated.    The  vertex  projects  strongly. 

Miorodon  pachystylum,  u.  sp. 
Habitat. — Georgia ! 

S  .  Length,  6™'",  First  antennal  joint  not  more  tban  one-half  the 
length  of  the  third,  reddish  yellow  ;  third  joint  much  elongate,  cylin- 
drical, obtuse,  more  slender  in  its  middle  portion,  dark  brown ;  arista 
basal,  much  thickened  and  very  short.  Froiit  and  face  broad,  of  equal 
width,  the  margins  parallel,  clothed  with  short,  light-yellow  pile  ;  face  in 
profile  most  projecting  below,  brownish  red,  shining.  Dorsum  of  thorax 
black,  shining,  broadly  reddish  on  the  sides ;  pile  short,  whitish.    Sen- 


\l! 


SYNOPSIS    or    NORTH    AMERICAN    SYRrHID.E. 


9^ 


1  tbe  hind 

(in  Mount 
18,  but  the 
n  are  very 
sddishyel- 


ont  broad, 
he  middle 
d  joints  of 
gth  of  the 
lort.  Dor- 
tare.  Scu- 
ss.  Abdo- 
lent  on  the 
each  side, 
•ase  of  the 
itly  convex 
i  elongate, 
part  of  the 
nal,  with  a 
le  last  vein 

collection). 


Isthmus  of 
lie  develop- 

it  a  name. 

the  meta- 
crescentric 
black  pile ; 
ongly. 


le-half  the 
ate,  cylin- 
wn;  arista 
d,  of  equal 
ile ;  face  in 
n  of  thorax 
itish.    Scu 


teilum  brownish  red,  small,  oval,  without  spines  or  tubercles.  Abdo- 
men elongate  oval,  nearly  bare,  finely  punctnlate;  sec(>nd  and  third 
segments  yellow ;  fourth  elongate,  black.  Legs  luteous  yellow,  the 
femora  chiefly  black;  hind  metatarsi  elongate,  somewhat  thickened, 
scarcely  dilated.  Wings  dark  brown,  less  so  behind.  Cross-veins  much 
inflected,  sinuous,  but  without  stumps. 

,g,  One  speciiueu,  Georgia  (National  Museum,  Professor  Riley's  collec- 
tion).   A  female  si)ecimeu  from  Texas  ditters  in  having  the  abdomen 

,  broadly  oval,  and  nearly  uniformly  brown,  the  anterior  segments  lute- 
ous in  the  middle. 

Microdon  falcatus,  n.  sp. 

Habitat. — Mexico ! 

9 .  Length,  o"""'.  Head  flattened,  vertex  projecting,  front  descend- 
ing. Front  and  face  reddish  yellow,  shining,  nearly  bare.  Antennae 
elongate,  black;  first  joint  slender,  second  short,  third  longer  than  the 
first  two  together,  thickened,  curved  falcate.  Eyes  bare.  Thorax  yel- 
lowish red,  nearly  bare;  dorsum  with  three  coalescent,  black  stripes, 
the  outer  ones  abbreviated  in  front  and  behind,  the  middle  one  behind ; 
(Scutellum  very  slightly  emarginate  bebind.  Abdomen  red  or  brownish 
red,  i>aler  toward  the  base,  very  broadly  oval,  depresvsed,  nearly  bare. 
Legs  black;  hind  tarsi  scarcely  dilated.  Wings  cinereous  hj'aline, 
Ktrongly  i)ubes(!eut;  the  veins  stout,  nearly  black;  last  section  of  the 
fourth  vein  inflected,  posterior  cross- vein  sinuous. 

Four  specimens,  Isthmus  of  Tehuantepec  (National  Museum,  Pro- 
fessor Riley's  collection.) 

Microdon  aurifez. 

Microdon  aiirifcx  Wiedemann,  Ansa.  Z\v.  Ins.,  ii,  85 ;  Macquart,  Dipt.  £xnt., ',,  <<, 

11,2,  tiili.  ii,  lijr. -J. 
?  Microdon  trochiJita  Walker,  Dipt.  Saunders  ,  216. 

i/«i»(7«f.— Mexico!,  Brazil  (Wied.). 

(J.  Length,  10">™.  Bright  metallic  green  with  violaceous  reflections; 
tip  of  the  abdomen  yellow;  legs  black.  Antennas  blackish  brown, 
first  and  third  joints  of  nearly  equal  length.  Face  rather  narrow,  mod- 
erately swollen,  white  pilose.  Front  with  black  pile,  considerably  nar- 
fowed  in  the  middle,  where  its  breadth  is  less  than  half  the  distance 
between  antennsB  and  ocelli.  Eyes  sparsely  pilose.  Dorsum  of  thorax 
|rith  moderately  abundant  erect  black  pile ;  in  front  and  on  the  sides, 
With  sparse,  light  yellow  pile.  Scutellum  large,  trapezoidal,  covered 
With  light  yellow  pile;  spines  small  and  remote.  Abdomen  less  viola- 
ceous than  the  thorax,  nearly  bare;  first  segment  with  yellow  pile;  sec- 
tod  with  an  anterior  opaque  black  cross-band;  hypopygium  wholly 
teddisli  yellow,  not  shining.  Legs  black,  with  a  greenish  reflection,  es- 
pecially on  the  hind  pair ;  pile  black,  rather  long,  fringed  on  tln^  outer 
8i<lt'  of  the  tibiae,  particularly  of  the  hind  pair;  hind  tarsi  considerably 
dilated.  Wings  nearly  uniformly  cinereous;  posterior  cross- vein  not 
much  inflected,  without  stump. 


1. 

4 


10 


BULLETIN   31,    UNITED    STATES   NATIONAL    MUSEUM. 


,S   - 


'!  :) 


i\ 


One  apeciraen,  Tsthmus  of  Tebuantepec  (National  Museum,  Profes 
8or  Riley's  collection).  This  species  must  resemble  M.  aurulentns,  but 
there  are  differences  from  Fabricius's  brief  description,  k  ,  Wiedemann 
pointed  out,  and  especially  from  Macquart's,  who  it  may  be  supi)ose(l 
examined  the  type  in  Bosc's  museum  at  Paris.  It  is  also  evidently 
related  to  M.  inequalis  Loew,  but  differs  especially  in  the  pile  of  the 
thorax. 

Microdon  scitulus,  ii.  sp. 

Habitat. — Florida! 

S  .  Length,  B"™.  Bright  metallic  green  and  steel  blue.  Head  hem- 
ispherical. Front  and  face  steel  blue,  narrow,  the  former  lightly  emar 
ginate  on  the  sides,  with  short  black  pile,  the  least  width  less  than  the 
distance  from  anterior  ocellus  to  base  of  antenna} ;  face  but  little  project- 
ing in  i)rofile,  thickly  white  pilose;  antennae  black ;  third  joint  a  little 
longer  than  the  first,  a  little  broader  on  its  outer  part ;  arista  slender. 
Eyes  bare.  Dorsum  of  thorax  with  strong  steel  blue  reflections,  thinly 
pilose.  Scutellum  subtriangular,  si)ines  moderately  stout,  approxi 
mate.  Abdomen  brilliant  gretsn,  uniform,  with  fainter  blue  reflections, 
finely  punctulate,  elongate  oval,  on  the  sides  with  oblique  spots  and 
on  the  end  white  pubescent.  Femora,  except  the  tip,  metallic  green, 
tibiai  yellow,  tarsi  more  luteous.  Wings  nearly  uniformly  subiufiis 
cated;  outer  cross-veins  rectangular  and  straight. 

One  specimen,  Florida  (National  Museum,  Professor  Kiley's  collec- 
tion). This  species  might  be  identified  as  M.  rujipen  Macq.  were  it  not 
for  the  discrepancies  in  the  pile  of  the  eyes,  face,  and  front. 

Microdon  marmoratus. 

Mii'.rodon  marmoratum  Bigot,  Ann.  Soc.  Eut.  Fr.,  1883,  ',ViO. 

Habitat. — California  (Bigot). 

$  .  Long.,  1)'"°'.  Obscure  fuscum.i  Jfavo  pallido  satis  dense  tomentosum. 
Anton  ids  fulvis,  apice  phis  minus  infuscatis;  J'ronte  et  facie  fuse  is,  later! 
bus  obscurd  testaceis;  abdomine  utrinqiie.  late,  plus  mimis  fulvo  tincto; 
pedibus  fulvis,  femoribus  basi,  annulo  tibiurum,  tarsorum  posticorum  se(j- 
mento  basilari,  nigris;  alis  cinereis,  apice  <)bscurioribus,  venis  fusco  Urn- 
bat  is.     9  .  Simillima.    Fronte  et  facie  rujis. 

cJ .  D'un  brun  fonc6,  assez  dens^ment  convert  d'un  duvet  veloutti 
fauve  clair,  plus  abondaut  sur  le  thorax  j  antennes  d'un  fauvei  plus  on 
moins  fonc6,  souvent  brunatres  vers  leur  extremity ;  face  et  front  bruns; 
thorax  rouge^tre  sur  les  cotes,  ^cussou  plus  ou  moins  roussatre;  cuil 
lerous  et  balanciers  d'un  testac6  pale ;  abdomen  souvent  un  pen  roun 
sStre  sur  les  cdtds;  pieds  fauves,  base  des  cuisses  largement  noire,  uu 
anneau  au  milieu  des  tibias,  et,  base  des  tarses  postdrieurs,  de  me  me 
couleur ;  ailes  grises,  Idg^remeut  enfumdes  au  bord  externe  et  a  Tex 
fremiti,  nervures  largement  borcl6es  de  bruuatre.  9 .  Semblable  au 
$  .    Face  et  front  rougeatres.    Californie. — 4  5,39  . — Bigot,  1.  c. 

S  .  Dark  brown,  densely  clothed  with  clear  fawn-colored  velvety 
pile,  more  abundant  ou  the  thorii.:*.;  antennae  more  or  less  dark  fawu- 


:m. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


11 


am,  Profes- 
ulentiis,  bnt 
iViedemaini 
e  supi)ose(l 
0  evidently 
pile  of  the 


Head  beui- 
gUtly  einar 
BS8  than  tht.' 
ittle  project 
joint  a  little 
ista  slender, 
tions,  thinly 
it,   approxi 
i  letiections. 
e  spots  and 
tallic  green, 
ily  subinfus 

liley's  coUec- 
.  were  it  uot 


tomentosum. 
fuscis,  laieri 
fulvo  tincto: 
sticorum  sen- 
is  fusco  Urn- 

ivet  veloutt 
mve  plus  oil 
front  bruus; 
ssatre;  cuil 
m  pen  rous 
nt  noire,  uu 
r.s,  (le  me  me 
ne  et  a  Tex 
pniblable  an 
t,  1.  c. 
)red  vol  very 
s  dark  fawu- 


colored,  often  brownish  near  their  extremity;  face  and  front  brown; 
thorax  reddish  on  the  sides;  .scutelhiin  mere  or  less  reddish;  teguhe 
and  halteres  pale  testaceous ;  abdomen  often  somewhat  reddish  at  the 
Bides;  legs  fawn-colored,  ba.se  of  femora  largely  black,  a  ring  in  the 
middle  of  the  tibice,  and  the  ba.se  of  the  hind  tarsi,  of  the  same  color; 
wings  gray,  distinctly  clouded  on  the  posterior  part  and  at  the  tij), 
veins  largely  bordered  with  brown.  9  .  Like  the  male,  face  and  front 
reddi.sh. — Translation. 

Mlcrodon  fulgens. 

Alicrodoiifulgena  Wiedi'innnu,  Ansa.  Zw.  Ins.,  ii,  82,  1. 
Apliritia  fulgens  Macquart,  Dipt.  Exot.  ler  Suppl.,  l'i-2. 

Aficrodon  cuglonnoidea  Gray,  in  Griffith's  Animal   Kingtloui,  ii,  tab.  125,  fig.  2. 
(Wallior,  List,  otc,  iii,  .^liS). 

Ilabitat. — Georgia  (Wied.),  Florida,  Guiana  (Macq.). 

Viridanreus,  alis  fuscanis.     15"'=",  9  . — Georgia. 

Fiihler  schwarz.  Untergesicht  stahlblau,  diinu  g»'lblichweiss  behaart. 
Mittelleib  griingolden,  in  gewisser  Kichtung  erschelnen  darauf  fast  kup- 
ferrotlie  Striemen.  Vortliigeldreieek  stahlblau.  Stun  zwischeu  griin . 
nnd  stahlblau.  Fliigel  fast  rein  braun,  doch  an  den  diinnen  Elinderu 
ipur  brJinnlich;  Schiippcheu  weiss,  mit  .schwarz  gewimpertem  Kaude. 
]feeine  griin  oder  blan. — Wiedemann. 

Autennai  black.  Face  sceel  blue,  thinly  yellowish  white  pilose. 
$'liorax  green-golden,  iu  certain  reflections  there  appear  copper-red 
Stripes.  Ante-alar  callosity  (VorflUgeldreieck)  steel  blue.  Front  be- 
tween green  and  steel  blue.  Wings  nearly  pure  brown,  on  the  thin 
veins  only  brownish ;  teguloB  white,  with  a  black  ciliate  border.  Legs 
green  or  blue. — Trauslatiou. 

Microdon  aurulentus. 

M.iJio  aurulentus  Fabricins,  Syst.  Antl.,  185,  8. 

Microdon  aurulentus  Wiedemann,  Anse.  Zw.  Ins.,  ii,  86,  10. 

Aphrit'iH  aurulentus  Macqnart,  Dipt.  Exot.,  ii,  2,  12,  4:  pi.  ii,  fig.  1. 

Habitat. — Carolina  (Fabr.). 

Viridi  teneus,  auro  tomentosus.  Twice  as  large  as  M.  globosus.  An- 
tennw  black.  The  entire  body  bronze-green,  clothed  with  thick  golden 
pile.    Legs  black. — Translation  from  Fabricius. 

9.  Long.  S™"'.  Face  et  front  k  polls  jaunes.  Antennes  noires; 
premier  article  un  pen  plus  long  que  dans  les  especes  europ^enes  et  an 
Snoins  autant  pie  les  deux  autres  r(?unis.  Thorax  k  poils  jaunes ;  tens- 
ion et  abdomen  k  poils  d'uu  fiiuve  dor6  plus  on  moins  absens;  pieds 
noirs;  jambesti  duvet  fauve.  Balanciers  fauves.  Ailes  brunatres.  De 
Hi  Caroline.     Bosc's  Museum. — Macquart. 

Face  and  front  with  yellow  pile.  Antennae  black,  first  joint  a  little 
longer  than  in  the  European  species,  and  a  little  shorter  than  the  two 
Others  together.  Thorax  with  yellow  pile ;  scutellum  and  abdomen  with 
pile  of  a  golden  luteous  color  more  or  less  wanting ;  legs  black ;  tibiae 


12 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


^1 


Mith  lutt'ous colored  i)ilo.     Tejjjula"  luteous colored.    Wings  brownish.-- 
Translation. 

Macquart's  description  was  based  upon  the  type  specimens  of  Fabri 
<;ins,  at  Bosc's  mnsenni,  Paris. 

Mic  o'f^n  rufipes. 

Afiliritin  rujipcn  MiU(|iiait,  Di))t.  Exot.,  ii,  2,  11,  1;  pi.  ii,  fig.  .1. 
Microdot)  rufipe$  OMmi  Siickon,  Catalogtio,  lUI. 

^rt/nY«i.— Piiiladelphia  (Macq.).  ^ 

Thorace  nigro-viridi,  ])nrpuro  lineata.  Abdoniine  nigro-cceruleo,  al- 
bido  tomentoso.     Tedibas  testaceis.     Long,  6""". 

Face  d'un  vert  noiratre,  a  polls  jauniitres.  Front  d'un  bleu  noiratre 
i\  poils  jaunatres  J  un  sillon  transversal.  Antennes:  i)reinier  article 
noiratre;  les  deux  autres  testaces.  Yeux  i)eu  veins.  Thorax  il  quatrt 
lignes  pourpres  sur  un  fond  vert  nietallique  noirsitre;  tlicusson  bleu; 
pointes  couvertes  de  poils  blanchatres.  Abdomen  ovale,  d'un  bleu 
violet  fonc6;  deuxi^rne  segment  h  bande  transversale  de  duvet  blanch 
atre  au  bord  posterieur,  interromime  au  milieu  et  s'elargissant  vers  les 
c('»tes;  troisieme  a  bande  longitudinale  de  semblable  duvet,  ^^galement 
interrompue  et  se  reunissant  il  I'extrdmit^.  Pieds  d'un  fauve  testacd; 
base  des  cuisse  noire.  Jialanciers  jaunatres.  Ailes  a  base  et  bord  ex 
t^rieurs  jaunatres ;  toutes  les  nervures  bordees  de  brunatre ;  premiere 
cellule  post6rieure  terminee  en  angle  et  appendiculec^ — Macquart. 

Face  of  a  blackish  gieen,  with  yellowish  j)ile.  Front  blackish  blue, 
Avith  yellow  pile,  with  a  transverse  groove.  Antenna;:  first  joint  black 
ish ;  the  two  others  testaceous.  Eyes  thinly  pilose.  Thorax  witli 
four  purple  lines  on  the  metallic  blackish  green  groun<l  color;  scutel 
lum  blue ;  jwints  covered  with  whitish  ])ile.  Abdomen  oval,  of  a  dark 
violet  blue;  second  segment  with  a  band  of  whitish  pile  on  the  i)oste 
rior  border,  interrupted  in  the  middle  and  enlarged  at  the  sides ;  third 
segment  with  a  lougitudiial  stripe  of  similar  pile  equally  interrupted 
aud  reunited  at  the  extremity.  Legs  reddish  colored,  base  of  femora 
black.  Halteres  yellowish.  Wings  at  base  and  exterior  Iront  Dorder 
yellowish;  all  the  veins  bordered  with  brownish;  first  posterior  cell 
terminating  hi  an  angle  and  ai>pendiculate. — Translation. 

The  figure  represents  the  last  section  of  the  fourth  vein  as  straight 
and  rectangular,  the  posterior  angle  a  little  acute  and  appendiculate. 


'I    I 

M 
II 


H 


I 


ADDITIONAL  NORTH  AMERICAN  SPECIES. 

Microdon  iuaequalis  Lotuv,  Coutnr.,  vii,  70. — Cuba. 
Microdon  laetus  Loow ,  Contm-.,  v.  4(5.— Cuba. 

Microdon  gracilis  Bigot,  AiinalesSoc.  Eiit.  dt)  Franco,  IHSJ,  ;i20. — Mexico. 
IChiimophUa  »pUndena  Macquart,  Hist.  Nat.  Dipt.,  i.lWi,  pi.  xi,  fig.  M;  Dipt.  Exot.,  ii,  2, 
10,  2,  1)1.  i,  lig.  2.— Phila. 

"Mr.  Bigot,  in  whose  possession  the  typical  si)ecimeu  of  Macquart'6 
description  now  is,  makes  the  following  statement  about  it  (Annales 
Soc.  Ent.  de  France,  185S,  p.  .590);  'The  head  of  this  specimen  is  glued 


JM. 
brownish.-- 

18  of  Fabri 


SYNOPSIS    OF    NORTH    AMKIilCAN    SVIU'IIIDE. 


Id 


I 


Oil,  iiiul  resoiiibk'.s  that  of  Conops,  wliiU'  tlu'  body  is  that  of  tin  I'xotio 
]\Iit;ro(h)n.'  Wo  may  with  safety,  t htMC tore,  *st like  out  the  j;eiius  and 
8i)e<!ies  from  amonjif  the  number  of  existiiif*"  forms.'"  Osten  Saclieu, 
Bull.  Uutf.  Soe.  Nat.  Sci.,  Nov.,  1875. 

"Since  writing  the  above  I  have  seen  the  speciuien  and  can  only  con- 
firm the  statement.  The  body  seems  to  beloiif?  to  Microdon  aurifex 
Wiedemann."    Osteii-Sacken,  Cat.  Dipt.,  Ii43.] 


coBi'uleo,  al 

(leu  noirtitre 
mier  articlt 
lax  tV  quatrt 
usson  bleu: 
',  d'un  bleu 
iivet  blanch 
sant  vers  les 
t,  C^jjalement 
uve  testace; 
'  et  bord  ex 
re ;  premiere 
icquart. 
lackish  blue, 
\  joint  black 
rhorax  witli 
olor;  scutel 
d,  of  a  dark 
)n  the  ])Oste 
sides;  third 
interrupted 
se  of  femora 
ront  Dorder 
losterior  cell 

11  as  straight 
ndiculate. 


PXICO. 

ipt.  Exot.,  ii,  2. 

Macquart'e 
it  (Anuales 
men  is  glued 


CHIIYSOTOXUM. 

^hrysotoxum  Moigeii,  in  Illi};cr's  Miij;iiziiic,  ii,  'ioD,  180:!. 

Kather  large,  thinly  pilose,  or  nearly  bare  species,  black,  with  bright 
yellow  markings  on  head,  thorax,  and  alxlouien.  Head  as  broad  or 
scarcely  broader  than  the  thorax.  Anteunie  elongate,  longer  than  the 
tead,  porrect,  situated  upon  anobtu.se  prominence;  lirst  two  joints  of 
nearly  equal  length,  tin?  third  elongated,  spindle-shaped,  before  the  mid- 
dle with  a  thin,  small,  bare  arista.  Face  liroad,  descending  somewhat 
below  theeyes,  below  the  antenuic  gently  excavated  in  prtttih',  an<l  with 
fin  obtuse  tubercle  on  lower  third.  Eyes  jdlose  (in  some  exotic!  species 
Dare),  <;ontiguous  in  the  male.  AbdoMien  more  than  twi(!e  as  long  as 
ihe  thorax,  beyond  the  middle  broader  than  the  thorax,  elliptical, 
Strongly  arched,  with  thin  lateral  borders;  hy])opygium  usually  con- 
cealed. Legs  comparatively  weak,  hind  femora  elongate,  hind  metatarsi 
fts  long  as  the  remaining  joints  together.  Thinl  longitudinal  vein  of 
the  wings  with  a  distinct  curvature  into  the  first  j)osterior  cell ;  first 
J^osterior  cell  closed  near  the  border  of  the  wing;  small  cross- vein  a  lit- 
tle before  the  middle  of  the  discal  cell,  a  little  oblique. 

In  addition  to  these  structural  characters,  the  species sliow  a  remarka- 
ble resemltlance  of  coloration,  which  I  give  here  to  save  repetition. 

Face  and  cheeks  yellow,  the  ibrmei-  with  a  black  stripe  running  from 
the  base  of  the  antennae  to  the  oral  margin,  the  cheeks  also  with  a 
black  stripe  from  the  eye  to  the  mouth.  Antenuic  black;  frontal  trian- 
gle with  a  black  spot  above  the  base  of  the  antenna;;  front  in  female 
bhu;k,  with  a  cross-band  near  the  middle  of  whiHsli  pollen.  Thorax 
black,  but  little  shining;  on  each  side,  with  a  yellow  interrupted  stripe; 
j|i  the  middle  with  a  pair  of  slender,  whitish  pollinose  stripes,  obsolete 
^eliind.  Scutellum  yellow,  across  the  disk  more  or  Jess  translucent  dark 
Colored.  PleurjB  with  one  or  more  yello^v  spots.  Abdomen  black,  but 
Mttle  shining ;  second  segment  with  an  arcuated,  interrupted  cross-band ; 
Ijach  of  the  following  with  an  arched,  anterior  cross-band,  and  the  pos- 
I^Brior  border,  yellow.  Legs  yellow,  sometimes  the  femora  more  or  less 
blackish  at  the  base.  Wings  nearly  hyaline,  with  an  anterior  brownish 
Oorder. 

This  genus  has  always  been  more  or  less  of  a  problem  to  dipterolo- 
gists.    The  characters  that  seem  to  distinguish  the  species  are  hard  to 


II 

I  i 

El:  :>, 


il: 


14  BULLETIN    31,    UNITED    STATES    NATIONAL    Ml'SEUM. 

(lesc'iibo.    The  lengths  of  the  juiits  of  the  iuitentiie  offer  ehariicteiK  of  i^^,  ^f 

Home  Viihie,  hut  I  feel  sure  thiit  they  are  not  so  reliable  a.s  some  authorn  gecond 

have  .supposed.     In  a  ratlier  large  series  of  speciinciis,  all  apparently  forniiu 

belonging  to  the  same  species,  I  find  a  very  considerable  variation  in  Qf  ^y^ 

the  lengtli  of  the  third  joint,  as  will  be  seen  in  figure  oa,  plate  I.  ^^  ^\■^^ 

TABLE  OF  SrECIES.  '^'^^^  > 

Til  re 

1, — The  liitisral  marfjin  of  the  third  al>(li>iiiiiiiil  Ht'';iiicnt  y«!llo\v 2 

Tho  liitcnil  margin  not,  yeUow 3  Chrysol 

2. — The  liliiek  on  the  tifth  abdominal  Hegineiit  in  shapt'd  like  an  inverted  V.    laterale  CV 

The  hlaek  has  the  two  posterior  branches  arcnate,  and  widely  se])arated  at  tlH>  Jfnhi 

tips ypsilon  «      ^ 

3. — Arcuate  bands  ot  abdomen  caitire  ;  the  black  spot  on  the  fifth  segment  is  <'loii-  \ 

gated  and  narrow,  with  the  branches  Jiearly  parallel     ....    integre  sue  nrs 

Arcuate  bands  interrupted 4  tOgCthe 

4. — Eastern  species 5  thorax  i 

Western  species derivatum  Scutelll 

5. — Black  s[)()t  of  the  fifth  abdominal  segment  inverted  Y-shaped    .    .    veiitricoBuni  nmdj.rtii 

Black  spot,  etc.,  inverted  V-shaped pubescens 

.  ineiitsc( 

Chrysotoxum  laterale.  '  Mrior  st 

CliriiHoloxKm  laterale  hoevr,  Centnr.,  v,  42.  Mgllienl 

//rt&<7rtf.— New  York  !,  Nebraska  (Lw.).  Wackfo 

i  .  Length,  11""".     Second  joint  of  antennae  a  little  longer  than  the  ;    '  '*  -^ 

first;  tliird  joint  a  little  longer  tliati  the  first  two  together;  eyes  pilose.  _      **^  *^ 

Lateral  stripes  of  the  thorax   sub-entire:  the  white  vittulie  conspicu-  ■^'  ^^' 

J_  I'fill  ^l 

ons.    Scutelluin  yellow,  the  disk  black  fasciolate.     Yellow  fasciic  of  the   j  .  ,  ^ 
abdomen  arcuate,  very  narrowly  interrupted,  connected  with  the  yel- 
low border  of  the  lateral  margins;  posterior  margin  of  each  segment   Ohrysoto 
yellow;  on  the  'first'  segment  narrowly,  on  the  third  broadly,  on  the  '*'". 

fourth  strongly  dilated,  on  the  fifth  produced  into  an  oblong  spot,  so  HabiU 
that  between  this  spot  and  the  fascia  the  black  forms  an  inverted  Y,  9.  Ej 
Ilypopygium  yellow.  Bach  of  the  middle  segments  of  the  venter  with  fasciae  of 
narrow  abbreviated  yellow  fascia  on  the  posterior  nsargin.  Legs  wholly  siibsej)at 
yellow.  Wings  cinereous  hyaline,  costa  with  a  narrow  fuscous  cloud  of  femora,  i 
equal  width.  From  G.  derivatum  Walker,  to  which  this  is  nearly  re  XO™'" ;  of 
lated,  it  will  be  easily  distinguished  by  the  thoracic  stripes  being  broader,  Third . 
by  the  margin  of  the  abdomen  being  yellow,  by  the  picture  of  the  I^es  j)il 
venter  being  difi'erent,  and  by  the  legs  being  wholly  yellow. — Transla'  wholly  j 
tion.  utely  arc 

A  single  female  from  New  York  (August  25)  I  identify  as  this,  but  the  margins, 
first  segment  of  the  abdomen  does  not  have  a  posterior  yellow  margin,  spot  in  i 

the  first 
Chrysotoxum  ypsUon,  n.  sp.  bauds  of 

Habitat. — New  Mexico!.  into  a  tri 

$  .  Length,  10  to  12""".  Large.  Third  joint  of  the  antenufe  longei  x/^gimpef 
than  the  other  two  together.  Scutellum  on  iis  disk  dark  and  translu  fagcia  on 
cent.    Arcuate  bauds  of  abdomen  rather  broad,  connected  with  the  yel 


w  \ 


M. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


15 


riraetoiM  of  ^^y  (,f  ^]^^  posterior  iniirf^in  behiml.  Murf^iu  of  the  abdomen  Irom  the 
me  authors  gecoiid  segment  yellow ;  the  blaek  spot  on  tlie  tifth  sefjnient  is  sh'n«ler, 
apparently  formin}^  three  arms;  the  basal  one  is  short,  formed  by  the  interruption 
ariation  in  ©f  th'^  areuate  ban<l;  the  two  i>08terior  are  curved  outwardly,  so  that 
the  distance  between  the  tips  is  about  the  same  as  the  length  of  each, 
Lej,'s  yellow.     Wings  with  a  narrow  brown  border  in  front. 

Three  specimens,  New  Mexico  (G.  F.  Guuraer),  from  Mr.  Eugene  Keen. 


,te  I. 


....    2 

....    3 

1  V.   later  ale 

lariitt'il  at  llie 

.     .     ypsilon 

;ment,  is  dttn- 

.    .    integie 

....     4 

....     5 

derivatum 

ventricoBum 

pubescena 


ger  than  the 

eyes  pilosi'. 

Ire  conspicu- 

■asciieof  the 

th  the  yel 

ach  segJiieiit 

adly,  on  the 

)ng   spot,  sn 

inverted  Y, 


Chrysotoxum  pubescens. 

Crjiaotuxiim  puhenvenH  Lin'W,  Wicii.  Eiit.  MouatHchr.,  iv.  84;  Ct'iitiir.,  v.  43. 

Habitat, — Illinois  (Lw.),  New  York!. 

(J  ,  $  .  Length,  lU-o"""'.  Second  joint  of  the  antennse  longer  than 
the  first;  the  thiril  Joint  in  the  female  subequal  to  the  two  preceding 
together;  in  the  male  longer.  Eyes  pilose.  Lateral  stripes  of  the 
thorax  interrupted;  the  median  vittulae  conspicuously  whitish  pollinose. 
Scutellum  yellow,  the  disk  black.  The  yellow  fasci.'e  of  the  abdomen  of 
moderate  width,  arcuate,  interrupted,  on  the  posterior  angles  of  the  seg- 
ments connected  with  the  posterior  bands;  these  hind  marginsonthe  pos- 
teri(»r  segments  are  broader  than  on  the  anterior  segntents,  on  the  last 
segment  dilated  into  a  triangular  spot  between  which  and  tiie  fascia  the 
black  forms  an  inverted  V.  Vt-nter  black,  posterior  margin  of  the  seg- 
ments yellow  ;  the  two  intermediate  in  the  male,  the  last  three  .segments 
ill  the  female,  each  with  two  ovate  yellow  spots.  Uypopygium  yellow. 
Legs  yellow.     Wings  cinereous  ;  near  the  costa,  lutescent. 

Translation,  compared  with  the  types.  Specimens  agreeing  with  this 
I  have  seen  from  New  York. 

Ohrysotoxum  ventricosum. 

L'hrysoloxum  ventricosum  Loew,  Ceiitiir.,  v,  44. 


Habitat. — District  of  Columbia  (Lw.),  Canada! 

9  .  Eyes  pubescent,  scutellum  wholly  yellow,  abdomen  globose,  with 

!  venter  with  fascite  of  moderate  width,  modera,tely  arcuated,  narrowly  separated  or 

Legs  wholly  Hnbseparated  from  the  lateral  margin ;  base  of  the  front  and  middle 

cons  (!loudof  femora,  and  the  hitid  femora  except  the  tip,  black.     Length  of  body, 

is  nearly  re^  10"'" ;  of  the  wings,  10.5'""'. 

iing  broader,      Third  Joint  of  the  antenntB  a  little  longer  than  the  other  two  together, 
cture  of  the  I^es  ))ilose.    Lateral  stripes  of  the  thorax  interrupted      Scutellum 
w. Transla  wholly  yellow.    Abdomen  globose,  fasciai  of  moderate  width,  moder- 
ately arcuate,  narrowly  interrupted,  usually  separated  from  the  lateral 
thi.s,  but  tbe  margins,  and  from  the  i)osterior  nmrgin,  sometimes,  by  the  luteous 
How  margin,  spot  in  the  posterior  angles,  joined  with  them;  posterior  margin  of 
the  first  segment  with  a  narrow  yellow  band,  or  without  it ;  posterior 
bauds  of  the  remaining  segments  of  moderate  width,  the  last  dilated 
into  a  triangular  spot,  separated  from  the  fascia  by  a  black,  inverted 
tenuse  longei  y^ehaped  spot.    Last  three  segments  of  the  venter  each  with  a  yellow 
and  translu  fascia  on  the  posterior  margin.    Legs  yellow ;   base  of  the  front  and 
with  the  yel 


le 


nur.LiyriN  31,  united  states  national  muskim. 


I 


,    '. 


"I  ^'1 


niiddk'  fl'morii,  and  llic  liiml  fi'iiioni  oxcopt  tlio  tip,  bliick.  Wijigs 
cinfn'otis,  iiloii;;'  tlu'  costii  fuscous. 

6'.  centricoHum  (Ufl'ers  tVoiii  C.  nrciiati,  to  wliicli  it  is  nearly  allied,  in 
the  biisf  ot'tlie  abtloinen  bcin^  black  pilose. — Traiishitioii. 

I  liave  seen  a  si)ecinien  from  (Janaibi  which  I  believe  belonfjs  liere. 

Chrysotoxum  derivatum.     (Pluto  I,  (i;rH.  '>,  .'lu,  >'iA,  Cw.) 
VhriiHiitiiJHiii  lifrii'itlum  Wiilknr,  Lint,  ttic,,  iii,  7>Vi. 
(■hrijHoloj  inn  rilloMuhim  |{i;;<it,  Ann.  Site.  Knt.  <lr  l''r.,  IrtbU,  'A'S,\. 

Uahltnt. —  llndson's  IJay  Teiritory,  AhisUa,  (jolomdo  Mountiiiu»  (0 
S.),  California,  Orefjoii! 

?,  ^.  Len^rth,  10  to  U""".  Second  Joint  of  the  antennai  a  half  or  11 
thml  as  lonj;  as  the  thii<l ;  eyes  jtilose.  IMle  of  thorax  black  and  yel 
h)\v.  Bands  of  the  abdomen  rather  sleinh-r ;  llrst  ban<l  separated  bv 
a  considerable  distance  from  the  border,  whi(!h  is  not  yellow;  the  banc 
is  nsurtlly  connected  with  the  posterior  anH:les  of  the  sejjfinent  by  n 
small  yellow  spot;  third  segment  with  the  arcnated  cross-band  (i; 
nearly  ecpial  width  throughout,  narrowly  interrupted  in  tin;  mi«l<lif 
touching,  or  narrowly  separate«l  at  the  jmsterior  an;;les  from  the  yello? 
hind  margin;  the  hin<l  cross  band  usually  reaclH>s  quite  to  the  laten 
margin,  usually  slender,  mon*  or  less  dilated  in  the  middle;  fourth  soj; 
ment  similar,  but  the  arcuate  band  broadly  connected  at  the  outf: 
anjjles  with  the  broad  hind  marfiin;  the  posterior  band  is  considerablv 
widened  at  the  middle,  so  that  between  the  two  bands  there  is  in 
closed  an  arcihed,  elouffated  black  stripe;  fifth  sj'jfment  with  the  yd 
low  in(;losinff  an  inverted  V-shaped  spot. 

In  sonui  specimens,  both  male  and  female,  the  i)ile  on  the  si<les  of  \\v 
base  of  the  abdomen  is  in  larj^e  part  black;  the  arcuate  band  of  the  fourtl 
segment  is  entirely  separated  from  the  yellow  of  the  hind  margin,  ^iu- 
specimens. 

Chrysotoxum  integre,  n.  sp. 

Habitat, — Arizona! 

5  .  Length,  10"'"'.  Third  joint  of  the  antennae  longer  than  the  firs 
two  togetlu'r.  First  arcuate  band  of  abdomen  narrowly  interrupted 
connected  with  the  yellow  of  the  jKisterior  angles,  hind  margin  of  tli 
segment  narrowly  yellow  in  the  middle  ;  arcuate  ban<l  of  the  third  sc;' 
ment  entire,  connected  with  the  yellow  of  the  hind  margin ;  anterio 
angles  yellow,  posterior  marginal  band  angularly  dilated  in  the  miii 
die;  fourth  segment  similar,  the  arcuate  band  more  convex,  the  po> 
terior  band  more  dilated,  nearly  cutting  the  black  in  two ;  arcuate  bam 
of  the  fifth  segment  entire,  shaped  like  an  inverted  (J,  the  yellow  of  tli 
posterior  margin  dilated,  forming  an  elongate  narrow  stripe,  betwee: 
which  and  the  arcuate  band  the  slender  black  forms  an  elongate  in 
verted  U.  Legs  yellow.  Wings  narrowly  brown  along  the  front  mar 
gin. 


4' 


I 


•.I'M. 

»ck.     Wiiigj  I 

rly  iiUit'd,  in 

nwiin  here. 


SYNOPSIS   OF   NORTf!    AMERICAN   SYRPHID/K. 


ADDITIONAL  NORTH  A.MKKICAN  SI'KCIKS. 


IT 


[ountsiins  (0 

o)  ii  half  or  ii 

lack  and  yel 

si'parated  bv 

»\v ;  the  banc 

t'jjttneiit  by  ;; 

TOSH-baiul   o: 

th«i  iiiiddlt 

(III  the  yellow 

to  the  lateiii 

i;  fourth  sen 

at  the  cute: 

i  considerablv 

!s  there  is  in 

with  the  ye 

le  sidCiS  of  tlit 
dofthefourti 
jargiu.    ISfiu' 


than  the  firs 
iuterruptod 
marfjiu  of  tli 
the  third  so;: 
gin ;  anterio 
I  ill  the  iniii 
vex,  the  i)0> 
ai'cuate  bam 
yellow  of  til 
ripe,  betweei 
elongate  in 
;he  front  mai 


Chrysotoxum  u'grita  (I'iilir.)  Wittlfiiiaim.  Auhn.  Zw,  Iiim.,  ii,  ■«'^,  "J.— Jamuicn. 

SiirphiiM  nifirita  raliiiciiiH,  Kiit.  SyMt.,  iv.'JK'J,  ly, 

Midio  nifirita  FiiliriciiiM,  Synt.  Aiitl.,  1H:{,  1. 
Chrysotoxum  flavifroua  Mnr(|iiiiit,  I)ii>t.  Kxot.,  ii,  y,  17,  i." :  tiili.  iii,  Wg.  '.i.— New. 

foiin<lluii<l. 

It  will  be  impoHsible  to  ilclermine  this  species  from  the  description 
given  by  Macipiart.  For  this  reason  I  consider  it  merely  as  a  catalogue 
DHine,  that  should  be  dropped. 


PARAGUS. 

Paragiut  Latroillo,  Diotioiiii.  d'Hist.  Niitiir.  D6torvillo,  vol.  xxiv;  nist.  Nnt.dm 
CniHt.  et  Ins.,  ,\iv,  XV.t,  1-<M. 

SnudI,  nearly  bare,  ratlier  short  ipecies,  with  the  abdoiuen  curved 
downward  at  the  tip,  of  a  black  or  greenish  black  color,  with  yellow  on 
the  face  and  usually  more  or  less  reddish  on  the  abdomen.  Head  hem- 
iaplK  rical,  .somewhat  liattenccl,  broader  than  the  thorax.  Antennse 
ilbout  as  long  as  tln^  head,  directed  forward;  first  and  second  joints 
«hort,  third  longer  than  the  lirst  two  together,  raihei-  slender,  arista 
before  tlu^  middle,  bare.  Face  in  ]»roiile  somewhat  proje«;ting  l)eiow, 
«onvex,  with  an  obtuse  tuberchi.  Eyes  pilose,  narrowly  contignons  iu 
the  male.  Abdomen  as  wide  as  the  thorax  and  of  nearly  equal  width 
throughout,  gently  convex  above,  twice  or  more  as  long  as  the  thorax, 
With  a  shallow  transver.se  depression  on  each  segment,  the  distal  end 
bent  downward.  Legs  moderately  slender,  the  hind  metatarsi  much 
thickened,  as  long  as  the  remaining  Joints  together.  Marginal  cell  of 
iringopen;  third  longitudinal  vein  straight,  anterior  cross  vein  near 
the  base  of  discal  cell,  the  last  .section  of  fourth  vein  sinuate,  terminat- 
ing in  the  third  vein  in  nearly  a  right  angle,  at  a  considerable  distance 
before  the  tip. 

TABLE  OF  SPECIES. 

X* — Scutellum  with  a  yellow  border;  face  of  male  withoat  a  black  median  .stripe; 

,  front  of  I'cmale  narrow  above bicolor 

•  Scutellum  without  u  yellow  bordtsr;  fate  iu  both  nexeH  with  a  black  median  Btript?; 

;  front  in  female  of  nearly  equal  width 2 

'•• — Abdomen  with  more  or  less  red  on  the  dorsuni 3 

.*     Abdomen  wholly  greenish  black angustifrous 

$» — Vertical  triangle  in  male  large tibialis 

■'l     Vertical  triangle  not  unusually  large dimidiatus 

JiaraguB  angustifrons. 

Parufjtia  angiistifrona  Loew,  Centur.,  iv,  64. 

ir«6?Yat.--Atlantic  States  I 

9 .    Length,  5""".    Head  shining,  somewhat  metallic  black,  front  nar- 
low,  immaculate,  face  nearly  perpendicular,  but  very  little  projecting, 


18 


nULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


k 


if 

IF 


yellow  on  tlie  sides.  Anteniire  black,  tliinl  Joint  veddisli  below.  Pile 
oftlie  face  white,  of  the  front  blackish,  of  the  vertex  luteous.  Dorsum 
of  thorax  clothed  with  very  short,  sublutescent  i»ile,  in  front  obsoletely 
cinereous  bilineate.  Scutellum  of  the  same  color  as  the  thorax,  tlie  ex- 
treme apex  testaceous.  Abdomen  wholly  greenish  black,  wiiite  pubes- 
cent. Le^s  yellow  and  ochraceous  varied  ;  femora,  on  tlie  basal  liaif  of 
tiie  Iront  and  middle  ])airs,  and  tlie  '  .id  tarsi,  except  the  tip,  black  ;  tip 
of  iiind  tibiic  and  the  hind  metatarsi  fuscous.  Wiuys  hyaline;  stij,'iiia 
luteous. — Translated  from  original. 

^v  sinj-ie  female  si)ecim(Mi  I'roni  Professor  Kiley  af-rees  almost  i)er- 
fectly  with  this,  except  that  tlie  dorsal  stripes  of  tin;  thorax  are  veiy 
distinct,  a  character,  however,  that  is  very  variable  in  sjiecies  of  this 
j-enus.     I  can  see  no  structural  dilierences  between  this  and  i'.  Oicolor. 

ParaguB  bicolor.    (Pliitc  1,  lii;M.  7,  it.) 

Si/rpliiia  hicolor  FiibriciiiH,  Entom.  Syst.,  iv,  "-iH",  71,  17i)4. 

Miilio  bicolor  Eiibrii'iu.s,  Sv.st.  Aiifl.,  IHli,  10. 

ParayiiK  bkoJor  Lalrt'illc,  (Jon.  t'rust.,  m    ,  IWJ ;  Ah'igeu,  Syst.  Beschr.,  iii,  178, 

'i  (var.);  Mactiuart,  Hist.   Vat.  Dipt.,  i,  ruif),  2(var.);  Zetterstedt,  Dipt. 

Sirand.,  ii,  S\\),  1  (var.) ;  Scliinur,  Vt'ih.  Zool.  Bot.  Gob.,  vii,  301 ;  id.  Fauua 

Aiistr.,  i,'ir>i». 
Paraf/iis  testaceiis  Mcigeii,  Sy.st.  Bcsclir.,  iii,  ISO,  ()  (var.). 
I'araiiiin  (tiriiat'iH  Mi'ifit'ii,  I.e.,  iii,  17i),  3  (var.). 
Purmjiis  pinu:' iilutiiH  Zcttcrsti'itt,  Diiit.  Scand.,  ii,  850,  <J. 
Parufnin  twiiialu8  Mfiji;(".i,  1.  c,  iii,  179,  4  (var.). 
Para(]Hx  rujlranda  ZcttorntiMlt ,  I.e.,  SWZ,  .'"). 

Habitat. — Xortli  America.  Europe  !. 

$  9.  Lengtli,  4  to  (I""".     Eyes  with  a  distinct  vei'tical  glabrous  stripe, 
Face  of  male  wholly  i)iire  lij?lit  sulphury  yellow,  the  oral  margin  and 
cheeks  shining  black;  in  the  feimde  there   is   a  shining  black  stiipf 
reaching  from  the  anteniiie  to  the  oral   margin.     Antenna'  blackish; 
the  under  sid<',  of  the  third  Joint  red.     Front  of  the  i'emale  narrowcii 
above,  so  that  at  the  vertex  it  is  not  more  than  half  as  wide  as  at  llit^ 
base  of  the  tinteuiuv;  shining  black,  lightly  dusted  on  the  sides  lielow; 
frontal  triangle  yellow,  the  eyes  scarcely  t()uch  each  otlier  at  a  poiii; 
jiiidway  between  the  ocelli  and  base  of  the  antenna-;  vertical  trianglt 
black,  light  pollinose  in  front.     Thorax  black,  a  little  shining,   witl 
light  yellowish  pile,  in  front  with  two  whitish  pollinose  stripes.     lMeu^;^ 
silvery  white  pilose.     Scutellum   with   a  whitish  yellow  border,  \w 
extending  to  the  anterior  angles.     Abdomen  chielly  red,  but  variadli 
ill  color;  tirst  segment,  black;  second  segment,  often   wholly  black 
sometimes  more  or  less  red  behind,  sometimes  only  black  on  the  sides 
The  black  usually  extends  narrowly  along  the  sides  of  the  third  sei.' 
ment,  sometimes  of  the  fourth  and  lifth  also;  rarely  the  third  segmcii 
has  a  blackish  band.     File  on  the  si<les  of  the  segments  in  front  ami  <ii 
the  lateral  margins,  and  on  the  fifth  segment,  white,  elsewhere  obsciin 
IjCgs  variable,  frequently  the  basal  portion  of  the  front  and  middl' 
femora,  and  the  hind   femora  except  the  tip,  are  black;   soinetiiia.'' 


M. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHID^. 


19 


plow.  Pile 
i.  Doi'sum 
t  obsoU'tely 
nix,  the  ox- 
hite  piibos- 
ijisal  hull"  ot 
1,  bliicU ;  till 
iiie;  sti^nua 

almost  per 
[•iix  ave  ver.v 
L'cieH  of  this 
cl  r.  bicolor. 


leschr.,  iii,  178, 
terstciU,  Dint, 
301 ;  ill.  Fiiuua 


vbrous  stripo. 
margin  and 
black  stviiH' 

luv  blackisli; 
Ic  iiavro\v«'(i 
lie  as  at  tlit 
sides  \)el()\v 
'1^  at  a  poiii; 
tical  triaiijili 
lining,  witi 
)es.     rieni> 
bonier,  ii»i 
but  variiiMi 
holly  black 
on  the  8i«h'> 
he  third  sc}; 
bird  segnicii 
front  an«l  oi 
here  obscun' 
t  and  niiddli 

-,   Hometinie.^ 


also,  there  is  a  black  ring  on  the  hind  tibite,  and  the  hind  metatarsi 
also  bla(;k ;  often  tlie  black  is  wholly  wanting,  the  legs  are  then  yel- 
lowisli  red  witii  the  tip  of  the  femora  and  the  base  of  the  tibiiu  light 
yelh>w.     Wings,  nearly  hyaline;  stigma,  dilutely  yellow. 

Ten  s])ecin)e"«  from  Montana  (Professor  Comstock) ;  one  from  ( Jar- 
land,  ('olo.  (Professor  lliley);  one  from  Como,  Wyo.;  two  from  Wash- 
ington Territory  ;  one  from  Southern  California;  and  four  from  ( 'ounecti- 
cut.  Tlie  species  is  very  variable.  In  Europe  there  has  been  much 
confusion,  as  will  be  seen  from  the  list  of  synonyms,  which  I  liave  re- 
l)roduced  from  Schiner.  To  this  author  our  knowledge  of  the  variations 
is  ciiietly  due,  and  hence  the  following  translation  of  Ins  description 
and  remarks  will  be  valuable  ;  ''Abdomen  black;  in  the  middle  in  greater 
or  less  extent,  yellowish  re<l.  When  the  black  is  confined  (o  the  base 
of  the  ahdoiiUMi,  the  first  segment,  at  least,  is  always  black,  or,  in  the 
middle  behind,  there  may  be  a  small  red  spot,  and  [\w,  black  <!olor  does 
not  here  api)ear  spotted.  (Iround  color  metallic  black  or  dark  bronze 
greiMi.  Dorsulu  of  thorax  witl)  two  median  stripes  reaching  nearly  to 
the  middle,  sometimes  wholly  wanting.  Antenna'  brown.  Abdomen, 
except  the  base,  wholly  yellowish  red  (var.  testaccus) ;  or  yellowish  red 
with  the  base  and  tij)  black,  and  on  tlu^  third  and  fourth  and  fifth  seg- 
,uients  with  white  pilose  arcuated  spots  (var.  arcimtus  and  bicolor);  or 
I  with  these  [)ilose  spots  wanting  (var.  taeniatii.s);  or  the  reddish  c;dor  is 
confined  to  tij)  {Xiu:  rnjicaiida),  in  which  case  the  scutellum  is  wholly 
blick.  The  legs  are  yellow  with  the  base  of  the  femora  black,  some- 
times with  a  black  ring  on  the  hind  tibia;,  and  with  darkiuied  meta 
tarsi. 

'•A  careful  examination  of  my  rich  material  has  given  me  no  better 
results  than  the  above.  It  is  difficult  to  believe  that  the  long,  slender 
varieties,  four  millimeters  in  length,  and  the  robust  specimens,  six  niilli- 
lueters  in  length,  should  belong  to  one  and  the  same  species,  and  yet 
we  find  between  these  extremes,  numerous  connecting  f(H'ms.  The  color 
lias  no  value,  jilastic  difi'ereuces  are  wholly  wanting  ;  specimens  occur 
in  "AJiich  ditlerences  of  neuratiou  exist  in  the  two  wings  of  the  same 
iu<lividual.* 

"Specimens  have  been  taken  in  copula  of  P.  bicolor  and  P.  testaceuSy 
P.  fc.stacens  i\\n]  P.  t(mi(itH8.'^  \ 

Paragus  tibialis.    (Plate  I,  Jij(.  8.) 

I'ipiai  tibialin  Fallon,  Dipt.  Suec.  Syrph.,  f>0, 5. 

I'liiiujun  hamorrhoHK  Meigeii,  Syst.  Bcschr.,  iii,  18'i,  10. 

I'armjHx  iniiim  Mcij;en,  1.  e.,  Ls:?,  U  ;  Zottcrstfdt,  Dipt.  Scaiul.,  ii,  854,  8. 

I'ariiijiiH  ohncuritu  M^gnx,  1.  <;.,  183,  1'2. 

I'liniijiix  lihialis  Mfi^jcn,  1.  c,  183,  l;! ;  ZcttcrstoU,  Dipt.  Scauil.,  ii,  852,6. 

I'drcKlitu  fcnioratiiH  Mcijrcii,  1.  e.,  I'^t,  14. 
i  I'urnijm  lr\angnlifirun  ZoftcrHtcdt,  Dipt.  Si'utid..  ii,  853,  7. 

*  raraijiixxUjUlntux  Curtis,  Hiit.  Eat.,  ■)t»3. 


*  Fiiuiia  AiiBtr.  i,  a59. 


tVerh.  Z.  B.  Ges.,  vii,  301. 


i' 


ii 


S 


"I 


1 


1^^ 


Vf 


It 
!■  :1 


20  BULLETIN    31,    UNITED    STATES    J^ATIONAL    MUSEUM. 

Paraynx  uigriliH  fiimincrthal.  IjuU.  d.  iloiu-on,  xv,  G(W. 

Faragiis  albiptn  Giiuiiicrtlial,  1.  c. 

raiagus  ilhpar  SclimiiiiH'l,  Ai'l).  ii.  Vcrilnd.  d.  Schl»!.s.  Ges.,  184'2, 163. 

Paragus  coadunatns  Roiidaui,  Nnovi  Ann.  <l.  Si;.  Nat.  tli  Bolognii,  1847, 18*2, 10. 

Paragus  tihiaUn  SchintT,  Fauna  AuHtr.,  i,  257. 

Paragns  auricaudaliiH  Bi;j;ot,  Aiinales  Soc.  Eut.  Fi-.,  1884,540. 

Habitat. — Europe,  North  America!. 

3  2  .  LcM^tli,  3  to  ')'"'".  Very  variublo  in  size  and  color  in  the  nu- 
nieron.s  varieties,  between  which  tliere  are  frequent  connecting  forms. 
Wholly  black  or  black  green  (var.  ohscnrus,  femortttm,  and  tibialis)^ 
or  black  with  the  tip  of  the  abdomen  reddish  yellow  (var.  hnmorrhous 
and  (viieus),  or  black  with  red<lish  yellow  triangular  spot  on  the  third 
segment  (var.  tri(tn{fuh(tit,s  and  .sigillatus),  or  black  with  the  last  three 
segments  yellowi.sh  red,  the  antepenultimate  one,  however,  wholly  or 
partly  black.  Antenna}  as  long  as  the  head,  or  somewhat  shorter, 
at  the  base  usually  blackish  brown,  the  third  joint  of  the  sanu^  color, 
oft(!n  lighter  below,  and  sometimes  on  the  under  side  yellowish  brown. 
Facte  on  the  sides  yellow,  in  the  middle  broadly  shining  black,  on  the 
lower  part  somewhat  projecting,  and  a  small  but  distinct  tubercle  above 
the  oral  margin.  Legs  light  yellow,  black  on  the  base  of  the  femora; 
sometimes  the  black  comprises  the  whole  of  the  hind  femora,  except  the 
tip  ;  sometimes  aL^o  the  hind  tibia? have  a  black  or  biown  ring,  or  their 
tip  is  brown.  Scutellum  wholly  black.  Wings  hj'aline,  slightly  graj'ish 
yellow  tinged. — Translation  from  Schiner,  Fauna  Austriaca. 

I  have  several  si)ecimens  from  New  England  and  California,  iu  which 
I  can  detect  no  difference  from  specimens  from  Europe. 

Paragus  dimidiatus. 

ParaguH  (llmidiatiin  Loew,  Contnr.,  iv,  H3. 

Uabitat. — District  of  Columbia  (Lw.)! 

5,9.  Length,  3  to  4.2;j""".  Shining  black-green;  scutellura  without 
yellow,  Eace  yellow,  moderately  prqje(5ting,  with  a  median  strii)e  in 
both  sexes.  Legs  yellow  and  ochraceous  ;  basal  half  of  femora  black. 
Three  segments  of  abdomen  in  the  male  ochraceous  red.  Wings  hyaline ; 
stigma  very  dilutely  subfuscous.  Ver;^  similar  to  P.  tibialis,  var.  ha-ui 
orrfious,  but  the  vertical  triangle  is  less  broad,  the  face  less  i)rojecting, 
and  the  pile  of  the  whole  botly  somewhat  shorter.  Third  antennal  joint 
sordid  reddish  below.  Abdomen  of  the  female  wholly  black-green,  of 
the  male  with  the  first  two  segments  black-green,  the  following  ones 
ochraceous  red.  As  the  picture  of  the  abdomen  iu  /*.  tibialis  is  very 
variable  it  is  probable  that  the  same  variability  may  be  found  iu  this 
species. — Translation  from  original. 

The  structural  ditterences  given  for  this  species  may  justify  its  sepa- 
ration from  P.  tibialis,  but  in  the  examination  of  a  considerable  material 
which  I  have  compared  with  specimens  of  this  latter  front  Europe  I 
have  not  been  able  to  satisfy  myself  of  difl'ereuces  sufficient  to  justify 
specific  separation. 


ini 


m 


M. 


SYNOPSIS    OF   NORTH   AMERICAN    SYRPHIDiE. 


21 


r,  182, 10. 


in  tlio  uu- 
ting  tonus. 
1(1  tibialis), 
lamorrhoiis 
II  the  third 
Li  last  three 
',  wholly  or 
at  shorter, 
same  color, 
lish  brown, 
ack,  on  the 
ercle  above 
:he  femora ; 

except  the 
ng',  or  their 
itly  grayish 

ia,  iu  which 


um  without 

ji  stripe  ill 

lora  black. 

gs  hyaline; 

var.  lid))! 

)rqjectiug, 

ennal  joint 

k- green,  of 

owing  ones 

alis  is  very 

mini  in  this 

ify  its  sepa- 
)le  material 
I)  Europe  I 
it  to  justify 


NAUSIGA8TER. 

Nansigaater  Williston,  Trans.  Amor.  Ent.  Soc,  xi,  33,  1885. 

Moderate  sized,  nearly  bare  specios,  Mack  in  ground-color,  but  thickly 
pollinose,  with  shining,  numerous  small  black  imnctulate  spots.  Head 
spheroidal,  broader  than  the  thorax.  Eyes  bare,  contiguous  in  the  male. 
Front  narrowed  above,  ev^enly  arched  to  the  antenute,  which  are  situated 
a  little  above  the  middle  of  the  head  in  profile.  Face  narrowed  below, 
concave  on  upper  part  below  the  antennae  j  the  tubercle  near  the  middle 
large,  obtuse,  below  it  much  receding  to  the  oral  margin,  resviubling  iu 
structure  the  species  of  Paragm,  but  more  concave  above  the  tubercle  and 
more  receding  below  it,  the  tubercle  being  higher  up.  Cheeks  narrow. 
First  and  second  joints  of  the  antennse  extremely  short,  so  ttiat  the  third 
joint  appears  sessile,  the  latter  thickened,  large,  subquadrate,  as  broad  as 
long,  the  angles  rounded,  and  narrower  on  the  basal  portion ;  aristasmall, 
bare,  very  short,  not  as  long  as  the  third  antennal  joint,  remote  from 
the  base,  situated  upon  the  anterior  rounded  angle  near  the  end  of  joint. 
Scntelluin  small,  convex,  but  thinned  along  its  margin.  Abdomen  very 
couve.v  above,  beyond  the  middle  being  iu  cross-section  two-thirds  of  a 
circle;  first  segment  short;  second  segment  moderately  long;  third 
segment  much  sliorter  than  the  second  in  the  middle,  on  the  sides  about 
as  long,  the  incisure  in  front  forming  a  deei)  stricture,  less  evident  be- 
hind ;  fourth  segment  very  large,  as  long  as  the  three  ])receding  together, 
forming  half  of  an  ellii)soid,  flattened  on  one  side,  the  strongly  convex 
end  extending  beyond  the  anal  opening,  and  wholly  concealing  the  fol- 
lowing segments.  The  sides  of  the  abdomen  are  directed  downward 
and  inward,  inclosing  toward  the  outer  |)art  of  the  venter  a  deep  cavity, 
shallower  on  the  second  and  third  segments;  at  the  posterior  part  of 
this  cavity,  and  concealed  by  the  posterior  rim,  is  the  anal  oi)ening  look- 
ing obliquely  forward;  back  of  the  anus  on  the  rim  on  each  side  is  a 
small  obtuse  membranous  flap  or  i)rocess.  Hy])oi)ygium  small,  wholly 
concealed.  Legs  as  in  Paragus — rather  short  and  moderately  strong,  the 
hind  metatarsi  thickened.  Wings  more  like  those  of  Syritta  than  of 
Paragus.  The  first  longitudinal  vein  joins  the  costa  a  little  before  the  tip 
of  second  vein,  and  then  by  a  curve  at  the  tip,  so  that  the  vein  runs 
parallel  to  the  costa  for  some  distance.  The  auterior  cross-vein  is  near 
the  basal  third  of  discal  cell,  and  the  third  vein  beyond  is  gently  bisin- 
nate.  The  last  .section  of  the  fourth  vein  is  sinuate  like  it  is  in  Syritta, 
but  more  deeply  so,  the  vein  terminating  very  near  the  costa,  but  form- 
ing nearly  a  right  angle  at  its  juncture. 

Type  of  genus,  K.  ptinctulata  Williston,  i!f.  America. 

Kausigaster  punctulata.     (Plate  I,  t\<2;H.  10, 10a.) 

Xaiwhjanfer  piiiicliilataWWViston,  TniiiH.  Ainor.  Ent.  Sol'.,  xi,  34 ;  pi.  ii,  lig.  l.^>. 

Habitat. — New  Mexico,  California,  Mexico! 

9  .  Length,  12"'™.    Black,  moderately  shining,  everywhere,  except  ou 
legs  and  venter,  covered  with  whitish  pollen,  which,  when  not  rubbed, 


ni 


oo 


V\  I' 


(I 


■! 


I'    h 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


leaves  very  numerous,  nearly  coutifiuous  circular  black  spots,  more 
abundant  on  the  thorax ;  on  the  dorsum  of  thorax  and  abdomen  the 
ground  color  of  the  moderately  shining  puuctulate  black  surface  may 
be  in  large  part  denuded.  In  the  middle  of  the  thoracic  dorsum  is  a 
pair  of  indistiuct,  less  pollinose  stripes.  Antennae  wholly  yellowish 
red  ;  the  cheeks  and  the  lower  part  of  the  face  obscurely  yellowish,  in 
♦he  middle  of  the  face  below  the  anteunai  there  is  an  oval  space  which 
is  evenly  pollinose,  free  from  the  black  dots.  Wings  hyaline,  with  two 
conspicuous  blackish  spots;  the  larger  one  beginning  in  the  subcostal 
cell  at  tip  of  auxiliary  vein,  thence  more  broadly  along  the  marginal 
cell,  the  base  of  the  submarginal  cell  for  a  third  of  its  length,  and  less 
distinctly  opposite  this  on  the  cross- vein  and  base  of  first  posterior  cell ; 
the  smaller  spot  reaching  from  the  tip  of  the  first  longitudinal  vein 
nearly  to  the  third ;  veins  black,  brown  toward  the  base.  Legs  yellow- 
ish red;  the  front  femora  on  basal  half,  and  the  other  femora,  except 
the  tips!  black;  the  front  and  hind  tarsi  brown. 

S  .  Five  male  s])ecimens  have  the  dorsal  stripes  more  apparent,  thert' 
being  three  with  two  others  between  them  less  apparent ;  the  legs  are 
darker,  the  tarsi  blackish;  the  wings  are  hyaline,  except  a  small  black- 
ish spot  on  the  stigma  reaching  across  to  the  third  vein. 

One  female,  New  Mexico  (Morrison),  and  five  males,  California  (Co- 
quillett). 

Since  writing  the  above  I  have  received  a  number  of  specimens,  botli 
male  and  female,  from  Mr.  Coquillett,  of  California,  and  I  And  them  all 
agreeing  with  the  males  above  described.  They  are  all  smaller  than 
the  type  specimen,  and  differ  in  the  wings  having  only  the  one  si)ot. 
instead  of  two,  as  in  the  original  female.  A  male  specimen  in  the  Na- 
tional Museum,  from  the  Isthmus  of  Tehuan tepee,  has  the  abdomen  nar- 
rower, with  coppery  reflections  where  denuded.  Both  the  legs  and  the 
spots  on  the  wings  are  darker  than  iu  the  type,  and  the  latter  are  con- 
nected through  nearly  the  whole  length  of  the  submarginal  cell. 


1/     < 


PIPIZA. 

Pipiza  Falleu,  Dipt.  Suec.  Syrpb.,  58,  1816. 
Heringia  Rondani,  Dipt.  Ital.  Prodr.,  i,  53, 1856. 
Pipizella  Rondani,  Dipt.  Ital.  Prodr.,  ii,  185,1857. 
Cnemodon  Egger,  Verli.  Zool.  Hot.  }^os. ,  x"v,  .573,  I860. 
PeniHW  Phillipi,  Verb.  Zool.  Hot.  ges.,xv,  741,  1865. 

Dark  metallic  green,  or  black,  small  or  moderate-sized  species,  thinly 
pilose  and  finely  puuctulate,  without  yellow  or  light  markings,  except  on 
legs  and  sometimes  a  basal  band  on  the  abdomen.  Head  as  broad  or 
somewhat  brosider  than  the  thorax.  Antenna}  not  longer  than  the  head. 
the  third  joint  rounded,  elliptical  or  a  little  elongate,  the  arista  basal, 
bare.  Face  flattened,  receding,  transversely  arched,  without  tubercli'. 
not,  or  but  slightly  projecting  below,  rounded,  clothed  with  pile,  uui 


^» 


SYNOPSIS   OF   NORTH   AMERICAN   SYRPHID^. 


23 


)0t8,  more 
[lomeu  the 
irface  may 
orsuui  is  a 
yellowish 
UowisU,  lu 
)ace  which 
5,  with  two 
i  subcostal 
e  maigiual 
h,  aiul  less 
iterior  cell ; 
atliual  vein 
legs  yellow- 
ora,  except 

arent,  there 
the  legs  are 
imall  black- 

iforuia  (Co- 

iimens,  botli 
lid  them  all 
mailer  than 
le  one  spot, 
ti  iu  the  i^a- 
jdomeu  nai- 
egs  and  the 
ter  are  con- 
cell. 


tecies,  thinly 
5s,  except  on 
as  broad  or 
an  the  heail. 
arista  basal, 
:>ut  tuberck'. 
th  pile,  uui 


fcrmly  metallic  green  or  black.  Eyes  contiguous  in  the  male,  pilose. 
Thorax  short,  broad.  Scutellum  with  an  acute  margin,  without  tnber- 
•iWes  or  spines.  Abdomen  about  three  times  as  long  as  the  thorax,  in  its 
ftiiddle  as  broad  ;  the  segments  shallowly  grooved  transversely.  Legs 
llot  verj'  strong,  the  hind  femora  sometimes  a  little  thickened ;  hind  me- 
tatarsi often  somewhat  thickened,  always  shorter  than  the  remaining 
Joints  together.  Wings  rather  short  and  broad;  marginal  cell  open, 
third  vein  nearly  straight,  or  gently  convex,  anterior  cross-vein  before 
the  middle  of  the  discal  cell,  first  posterior  cell  briefly  or  rather  long 
petiolate,  the  vein  at  outer  part  of  first  posterior  and  discal  cells  often 
Iteut  or  angulated.    Type  of  genus,  P.  noctihica,  Linn6. 

TABLE  OF  SPECIES. 

l._A1)(lonu'n  with  a  basal  intorrupted  yellow  fascia 2 

Abiloiiien  uniformly  black 3 

a.—Vi'^injrs  with  a  brown  spot  in  the  middle festiva 

Winfjs  without  a  brown  spot  in  the  middle femoralis 

.3, — Third  joint  of  antenniE  at  least  twice  as  long  as  wide 4 

Third  Joint  scarcely  twice  us  long  as  wide,  or  rounded 5 

4v— Third  joint  of  antenniB  elongate;  hind  metatarsi  much  thickened;  last  section  of 
fourth  vein  bent  near  its  middle pulchella 

Third  joint  elliptical?  liind  metatarsi  but  slightly  thickened;   last  section   of 

fourth  vein  bent  at  its  antepenultimate  third pistica 

a* — Bhtck  pilose nigripilosa 

Chiclly  light  pilose 6 

•^'— V^'ings  with  a  brownish  cloud 7 

Wings  without  such  cloud piaticoidea 

7. — Abdomen  chiedy  light  pilose albipiloaa 

Abdomen  chietly  black  pilose puella 

For  atlditional  species,  north  of  Mexico,  see  descriptions.  P.  puhes- 
4)ens,  P.  modeata,  P.  calcarata,  P.  salax,  P.  nigribarba,  P.  fraiidulenta. 

^piza  pubescens. 

TriyljiphuH  puhescenB  Loow,  Centiir.,  iv,  61. 

Habitat. — Wisconsin  (Lw.)! 

S .  I>lack-green,  clothed  with  rather  long  dilutely  lutescent  pile. 
Hind  tibite  black  pilose;  the  knees,  base  of  front  tibiae,  and  the  tarsi, 
^cept  the  tip  and  metatarsi  of  the  front  and  hind  pairs,  yellowish. 
Iiength,  4"""'. 

Black-green,  shining,  wholly  clothed  with  rather  long  pile.  Pile  of 
the  face  white ;  of  the  front  near  the  antennae  very  dilutely  lutescent ;  on 
tile  angle  of  the  front  above,  and  on  tlie  vertex,  black.  Antennae  black, 
rftther  long,  the  third  joint  oblong,  below  obscurely  reddish.  Pile  of 
^je  thorax  and  scutelln-.!  lutescent.  Pile  of  the  abdomen  lighter  than 
ok  the  thorax,  near  the  end  whitish,  on  the  posterior  margins  of  the 
jMcond  and  third  segments  black.  Legs  greenish-black,  pallidly  pilose, 
Htle  hind  tibiae  black  pilose  above.  Knees  and  base  of  front  and  middle 
tft>irB  dilutely  lutescent ;  front  taroi  black,  with  the  first  joint  fuscous 


BULLETIN   31,    UNITED    STATES   NATIONAL    MUSEUM. 


II 


,  ,^ 


nn 


:    f 


<;xcept  its  base,  second  joint  dark  luteous,  middle  tarsi  dilutely  luleous, 
the  third  joint  subfuscous,  tlie  last  two  joints  black,  hind  tarsi  blact. 
•iie  metatarsi  moderately  thickened,  their  tip  and  the  two  followiiif; 
JL>ints  dilutely  luteous.  Tegulse  white.  Halteres  light  yellowish.  AViiiys 
cinereous  hyaline ;  stigma  subfuscous,  spurious  vein  nearly  obsolete,  ex 
cept  its  node. 

Translation,  compared  with  the  type  spc-imen  in  the  Cambridge  Mu- 
seum. 

Pipiza  modesta. 

Tri<jlyphu8  modcstus  Loew,  Centur.,  iv,  62. 

Habitat. — Xew  York  (Lw.) ! 

9.  Blackish  steel-colored,  clothed  with  short  white  pile;  hind  tibia 
white  pilose ;  knees,  base  of  tibiae,  and  the  tarsi,  except  the  tip  and  the 
front  and  hind  metatarsi,  light  lutesceut.     Length,  5.5'"'". 

Blackish  steely,  moderately  shining,  clothed  with  short  white  pile; 
with  four  obscure  dorsal  Hues.  Front  rather  broad,  shining,  with  a  tii 
angular  white  poUinose  spot  on  each  side;  pile  rather  long,  on  the 
lower  half  and  on  the  vertex  white,  on  the  upper  half  black.  Antenns 
rather  long,  black,  third  joint  oblong  ovate,  below  obscurely  reddisb, 
Dorsum  of  thorax  and  scutellum  briefly  white  pilose.  Abdomen  deli 
cately  punctulate,  shining,  short  white  pilose.  Legs  black,  the  shon 
pile  white,  hind  tibisB  white  pilose  above ;  knees,  base  of  hind  tibice, 
and  the  basal  half  of  the  front  and  middle  pairs,  dilutely  lutesceiit; 
tii'st  joint  of  the  front  tarsi  fuscous,  tip  lutesceut,  second  joint  dilutelj 
luteous,  remaining  joints  black  ;  first  two  joints  of  the  middle  tarsi  di 
lately  lutesceut,  third  subfuscous,  last  two  black;  first  joint  of  hiuc 
tarsi  moderately  thickened,  black,  tip  luteous,  second  joint  dilutely  lii 
teous,  third  more  obscure,  fourth  and  fifth  black.  TeguliB  white.  Hal 
teres  dilutely  yellowish.     Wings  hyaline;  stigma  subffscous. 

Translation,  compared  with  the  type  specimen  in  the  Loew  collec 
tion. 

Pipiza  calcarata. 

Pipiza  calcarata  Loew,  Centur.,  vi,  42. 

Habitat.— ^ew  York  (Lw.) ! 

S .  Bronze-black,  white  pilose,  frontal  triangle  and  the  face  wholh 
black  pilose;  antennae  black,  below  reddish.  Legs  black,  the  knees 
front  tibite,  except  a  blackish  ring,  basal  half  of  the  middle  tibiae,  firs; 
three  joints  of  the  front  and  middle,  and  second  and  third  of  the  hiut 
tarsi,  luteous,  hind  coxae  with  a  slender  process.  Wings  cinerescent,  ex 
cept  the  basal  third.     Length  of  body  6.5'"™;  of  wings  6°"". 

Bronze-black,  moderately  shining,  white  pilose.  Pile  of  the  eye; 
whitish,  in  some  lights  blackish  or  black.  Pile  of  the  frontal  trian<;lt 
and  of  the  face  wholly  black  ;  antennae  black,  below  reddish,  tliiic 
joint  oblong  ;  pile  of  abdomen  very  short,  black,  on  the  lateral  margin; 
and  the  usual  metallic  spots  longer,  white ;  legs  black  ;  front  tibiae,  <.'s 


6..^ 


EUM. 

utely  liUeous, 
I  tarsi  blact. 
:wo  follu\viii{; 
)wisb.  Wiiiy.s 
r  obsolete,  ex 

im bridge  Mu 


if 
i 


SYNOPf=JI.'=«    OV    NORTH    AMERICAN    i^YUPlIID.E. 


25 


e ;  bind  tibia 
le  tip  and  the 

t  wiiite  pile; 
ig,  with  a  tri 

long,  on  the 
k.  Antenna 
irely  reddisb 
Lodomen  deli 
ick,  the  sbor; 
>f  bind  tibite, 
ely  Inteseeiit: 
joint  dilntelr 
iddle  tarsi  di 
joint  of  biui: 
iit  dilntely  In 

wbite,  Hal 
^ous. 

Loew  collec 


face  wholly 
ik,  the  kncei- 
lie  tibifB,  firs; 
d  of  the  biui 
nerescent,  ex 

of  tlie  eye; 
jntal  trian;;lt 
eddish,  tliiic 
[teral  margin; 
ont  tibit©,  ex 


cept  a  bhickisb  ring,  ba.sal  half  and  extreme  tip  of  the  middle  tibiie,  first 
three  joints  of  fi'ont  and  middle  tarsi,  and  the  second  and  third  joints, 
with  the  tip  of  the  first  of  the  hind  tarsi,  luteous;  hind  coxae  armed 
vitli  a  slender  process,  dilated  and  compressed  towiird  the  end;  hind 
metatarsi  a  little  iinirassate.  Wings,  except  the  basal  third,  cinereons, 
stigma  subfnscons,  small  cross-vein  from  the  base  of  thediscal  cell,  and 
the  last  section  of  the  fouj-tb  vein  from  the  margin  of  the  wing,  less  re- 
mote than  in  P.  nigribarba,  P.femoralis,  etc. — Translation  of  original. 

Type  specimen  compared.  The  siugnlar  long,  slender  process  on  the 
hind  cox.e  will  at  once  render  the  species  distinguishable. 

Pipiza  salax. 

Piljicu  aalax  Loew,  Centur.,  vi,  39. 

Habitat. — Pennsylvania  (Lw.) ! 

S  .  Black-bronze,  wbite  jiilose ;  ♦routal  triangle,  anterior  half  of  the 
vertical  triangle  and  posterior  margin  of  the  eyes  black  pilose;  antennae 
black,  below  red;  legs  black,  the  knees,  base  of  front  tibiae,  the  middle 
tibiic,  except  a  fuscous  preapical  ring,  and  the  basal  joints  of  the  front 
tarsi,  luteous.  Wings,  except  the  basal  third,  luteous  cinereous.  Length 
6.0""" ;  of  wings  5.5  to  O"™. 

Bliickbronze,  moderatel,'"'  shining,  wbite  pilose;  eyes  clothed  with 
niinute  black  pile,  below  with  white  ])ile  ;  frontal  triangle,  and  the  ver- 
ticiil  triangle,  except  the  posterior  xJart,  black  pilose;  antenna)  black, 
below  obscurely  reddish;  third  joint  oblong  ovate;  occiput  wbite  pilose, 
posterior  margin  of  the  eyes  black  ciliate ;  abdomen  brietly  black  pilose, 
ihe  lirst  segment,  the  lateral  margins  of  the  remaining  segments,  the 
nsuiil  metallic  spots,  and  the  posterior  part  of  the  fourth  segment  wbite 
pilose;  bypopygium  much  longer  than  in  other  species;  legs  black, 
the  knees,  basal  third,  or  half  of  the  front  tibiae,  middle  tibiae,  except  a 
very  broad  preapical  ring,  first  joint  of  the  front  tarsi  and  first  two 
joints  of  the  middle  tarsi,  luteous,  second  joint  of  the  front  tarsi  usually 
reddish;  bind  metatarsi  a  little  thicker  than  the  following  joints.  Wings 
cinereous,  basal  third  more  purely  hyaline,  stigma  subfuscous. 

Type  si)ecimen  compared. 

Pipiza  nigribarba. 

I'il)i:a  iiigriharba  Loew,  Centur.,  vi,  40. 

md'lfat.—^ew  York  (Lw.) ! 

S  Black-bronze,  wbite  pilose;  frontal  triangle  and  face  black  pilose j 
antennae  black;  legs  black,  the  knees,  base  of  front  tibiae,  first  three 
joints  of  middle  tarsi  and  the  intermediate  joints  of  front  and  bind  tarsi 
hiteous,  first  joint  of  bind  tarsi  strongly  incrassate ;  wings,  excei)t  the 
^sal  third,  cinereous,  the  last  section  of  the  fourth  vein  angulated. 
tiength  of  body  7™™;  of  wings  (5.5""". 

Black-bronze,  moderately  shining,  wbite  pilose.  Eyes  thickly  clothed 
with  blackish  pile;  frontal  triangle  and  the  anterior  half  of  the  verti- 
cal triangle  black  pilose.    Antennae  black ;  third  joint  oblong,  on  the 


i^; 


i' 


,'» 


w\ 


I  i 


1- '  \ 


|!  Ki 


i 


pen 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 

inner  side  near  the  base  obscurely  red.    Face  black  pilose,  above  (ex  _|, 

cept  the  sides)  white  pilose.    Occiput  briefly  white  pilose,  posteridi  *«-^!rai 

margin  of  the  eyes  black  ciliate ;  pile  of  abdomen  bluck,  very  short ;  on  j,Q||r„(,gf 

first  segment,  and  lateral  margins  of  each  segment,  except  the  anterior  uujp'iy  ). 

angles  and  the  usual  metallic  spots,  with  white  and  longer  pile.    Hypo      •i_'^  ^ 

pygium  short.    Legs  black ;  the  extreme  base  of  the  hind  tibiae,  and 

the  basal  half  of  the  front  pair,  luteous  ;  front  tarsi  fuscous,  ti])  of  tlic  Wplza  fei 

first  Joint,  and  second  joint,  luteous,  last  two  joints  fuscous  black  j  hind       Pipisa 

metatarsi  strongly  thickened,  black,  the  extreme  tip  luteous,  the  two 

following  joints  luteous,  last  two  with  the  tip  of  the  preceding  black; 

hind  tibiui  clothed  with  rather  long  white  i)ile  above.     Wings,  exce|(t 

the  basal  third,  cinerescent ;  stigma  subfuscous,  the  last  section  of  tlic 

fourth  vein  broken  in  an  angle. — Translation,  conipared  with  the  tyjx' 

H])ecimen. 

pilose. 

Fipiza  fraudulenta.  Posterioi 

Pipiza  fmndulenla,  Loew,  Centnr.,  vi,  41.  SeOOud  S( 

Habitat. — Illinois  ( Lw.) !  low,  at  ot 

i  .  Black-bronze,  with  white  pile,  frontal  triangle  and  the  face  black  aometiint 
pilose;  antennsB  b'.ir-k.     Legs  black;  the  knees,  base  of  front   tibiit,  adark  lii 
first  three  joints  of  the  middle  tarsi  and  the  intermediate  joints  of  tlnleilf  brow 
ether  tarsi  luteous,  hind  metatarvsi  strongly  incrassate ;  wings,  except  blttckisli 
the  basal  third,  cinerescent,  last  section  of  the  fourth  vein  bent,  not  an  lutseous. 


Pipiza 
Pipha 
Pipiza 

Sabita 

the  00(^11 


gulateil.     Length  of  body  0.5"""  ;  of  wings  0"" 


I  give  1 


Very  similar  to  P.  nigribarba,  but  the  antennoe  are  wholly  black,  tlntain  that 
hind  tibite  with  long  black,  not  white,  pile  above,  and  the  last  section catalogut 


of  the  fourth  vein  is  bent,  not  broken  into  an  angle. 

Type  spticimen  compared.    I  doubt  the  validity  of  this  species. 


Oaoada. 
tarsi  in  h 


Pigiza  pu< 

0abitai 

'Jf .  Lei 

Wlilte  pih 


Pipiza  femoralis. 

Pipha  femoralia  Loew  Ceutur.,  vi,  38. 

^I'ipicaradicum  Riloy,  1st  Rep.,  I'il,  fig.  66  ;  Amer.  Ent.,  i,  83. 

Habitat. — Illinois  (Lw.)  Pennsylvania!. 

S  .  Bronze-black,  pallidly  i)ilose,  fascia  of  the  second  abdominal  seg  ^j^i^^. .  f.^ 
meut  narrowly  interrupted ;  tip  of  femora,  the  tibiae  and  tarsi,  luteous,  ^jj^^mj.jj 
the  tip  of  the  latter  more  obscure ;  wings  cinereous  hyaline,  stigma  davkjigjii^g  gj^ 
ochraceous.    Length  8'"'"  ;  of  wings  7.5°"".  blackish  i 

Bronze  black,  moderately  shining,  pallidly  i)ilose.  Eyes  briefly  white ^q  ^]^q  \y 
l)ilose  ;  face  white  pilose.  Antenme  rather  large,  two  basal  joij)ts  red  jj^  \y\.^^ 
dish  ochraceous,  third  black,  near  the  base  obscurely  red;  arista  black,  ti|g|ie  ex( 
pallid  near  the  base.  The  luteous  fascia  of  the  second  abdominal  se,U|m^  ^jp  . 
meat  broad  and  moderately  arcuated,  divided  by  a  black  line,  aiulngjijiy  |,, 
separated  from  the  lateral  murgiu  by  a  black  border.  Pile  of  the  abdo  tiig  ^.q}^,^. 
men  short,  pallid,  near  the  base  of  the  abdomen  longer  and  white,  1h'  v^s  ate 
tween  the  yellow  fascia  and  the  posterior  margin  of  the  second  segment,  tjjjj  ]iixxi\ 
black.  Femora,  except  the  luteous  tip,  bronze-black;  tibiae  luteous, ^jgjjyyitjjj 
the  hind  pair  near  the  tip  obsoletely  annulate  with  fuscous ;  tarsi  lute     Qne  sp( 


^ 


3UM. 

e,  above  (ex- 
ise,  posterior 
jry  short ;  <tii 
;  the  anterior 
pile.  Hypo 
(1  tibiae,  and 

IS,  tip  of  tile 

black  J  hind 
0118,  the  two 
I'diug  black; 
rings,  except 
ection  of  the 
ith  the  type 


-5 

■I 


SYNOPSIS   OF    NORTH    AMERICAN    SYRPHID^. 


•27 


he  face  black 
front  tibiit, 
joints  of  till 
k'ings,  excc])! 
bent,  not  an 

lly  black,  tin. 
last  section 

)ecie8. 


doniinal  sejr 

arsi,  luteous, 

stigma  dark 

briefly  white 
al  joints  rod 
arista  black, 
[lominal  sou 
ck  line,  aiul 
1  of  the  abdo 
r1  white,  be 
)n(I  segment, 
biai  luteou.N 
;  tarsi  lute 


ona,  penultimate  joint  of  the  hind  pairs  black,  of  the  front  pair  fuscous, 
tenninal  joints  of  the  hind  pair  fuscous,  of  the  front  and  middle  pairs 
oohraceous  or  subfuscous.     Wings  cinereous  hyaline,  basal  third  more 
puyely  hyaline,  stigma  ochraceous  subfuscous. 
Two  specimens  from  Pennsylvania  (E,  L.  Keen). 

Plyiza  festlva.    (Pluto  II,  tig.  4.) 

Pip'na fvMva  Mt!i<;oii,  Syst.  Boschr.,  iii,  ^43,  'i;  Schinor,  Fauna,  etc.,  i,  868. 
I'ipha  oniata  Mfiycii,  Syst.  Bescbr.,  iii,  v!4;!.  :>  (ScliiiU'r)- 
Pipha  luiiata  Moi},'t!ii,  SyHt.  BoHchr.,  iii,  2i',i,  4  (Schiimr). 
'Pipiza  artemia  Meigen,  Syst.  B»!8chr.,  iii,  244,  5  (Schiner). 

jff^of7>»7rt^— Europe!,  Canada?  (O.  S.) 

d  ,  9  .  Length,  6  to  10.5'""'.  Front  and  ft  ce  long  white  pilose,  below 
the  ocelli  and  about  the  base  of  the  anLcniifB  in  the  female,  blackish 
pilose.  Antenuui  brown,  third  joint  trajjczoidal.  Thorax  white  pilose. 
Posterior  part  of  the  second  and  third  abdominal  segments  black  pilose; 
second  segment  with  a  variable  yellow  band,  "sometimes  sulphur  yel- 
low, at  other  times  reddish  yellow;  anterior  margin  concave  or  straight ; 
sometimes  interrupted  by  a  distinct  blaak  space,  at  other  times  only  by 
a  dark  line.''  (Schiner).  Legs  yellow,  with  black  femora;  tibisB  more  or 
less  brown  in  the  middle.  Wings  hyaline  on  the  basal  half,  externally 
blackish  or  smoky  brown,  fading  out  toward  the  margin ;  stigma  dark 
luteous. 

f  give  the  description  of  this  species,  although  it  is  not  known  for  cer- 
tain that  it  occurs  in  this  country,  it  being  given  in  Osten  Sacken's 
catalogue,  with  the  remark,  ''or  a  species  allied  to  it,"  n"'  occurring  in 
Canada.  The  European  species,  P.  noctUuca,  closely  related,  has  the 
tarsi  in  large  part  black. 

P^za  puella,  n.  sp.     (Plato  II,  tig.  a.) 

Mabitat. — New  Hampshire ! 

i .  Length,  G"'"'.  Dark  bluish  black,  clothed  with  light  yellowish- 
wnite  pile.  Frontal  triangle  white  pilose  on  upper  portion,  black  pilose 
below ;  face  white  pilo,se,  except  near  the  mouth,  where  it  is  black  pilose. 
Aii^.enniB  black ;  third  joint  cordate.  Eyes  blackish  pilose,  in  some 
ligkts  showing  luteous ;  posterior  orbits  wholly  white  ciliate,  a  little 
blackish  pile  at  the  vertex  only.  Abdomen  with  short  black  pile,  except 
OD  tbe  broad  anterior  angles  and  lateral  margins  of  each  segment. 
L6fs  black ;  the  immediate  tip  of  front  and  middle  femora,  the  front 
tibtae,  except  a  broad  brownish  ring,  the  middle  and  hind  tibiae  at  base 
and  tip,  and  all  the  tarsi,  except  the  last  two  joints,  yellow.  Wings 
nearly  hyaline  before  the  cross-veins,  with  a  distinct  brownish  cloud  at 
the  cross- veins,  fading  out  beyond  and  behind ;  stigma  luteous;  cross- 
veins  at  outer  part  of  first  posterior  and  discal  cells  nearly  parallel  with 
tbe  hind  border  of  the  wing,  the  outer  posterior  angle  of  first  posterior 
cell  with  a  stump  of  a  vein. 

One  specimen,  White  Mountains,  New  Hampshire,  August  1. 


"** 


28 


BULLETIN   31,    UNITED    STATES   NATIONAL    MUSEOI. 


El 


!>' 


, 


Ir    I 


1  > 
\  I 


.H 


) 


Pipiza  pi 
Habit 


Pipiza  (Peniiim)  albipilosa,  u.  np. 

Habitat. — Pounsylvania  I  9     j^, 

9  .   Length,  7'"'".    Antennae  black,  the  third  joint  more  browni.sli.:i  lQ^^,^.  ^\ 

near  the  base,  especially  on  the  inner  side,  reddish;  in  shape  ol>tu,si  ^j|Qm.  ^ 

])ointed  ou  the  lower  anterior  part,  subcordate,  only  a  little  longer  tli  mjfldiV 

broad.     Head  and  thorax  shining  black,  with  a  greenish  letlectii  ,^g,.f j,„ 

wholly  clothed  with  nearly  white,  rather  long  pile,  except  Just  i<')i  HJlDriix 

the  insertion  of  the  antennae  where  there  is  a  small  quantity  of  1»1"  jjifeni.sli 

pile.    Abdomen  shining  black,  on  the  jmsterior  part  of  the  second  n  nflt^tjc  ,•: 

third  segments  with  narrow,  more  dark  appearing  cross-bands  of  sin  jjn^^ ^   ^^ 

black  pile ;  i)ile  elsewhere  light  coloriMl,  shorter  and  less  abundant  tL  f^j^  jj., ,, 

on  the  thorax.     Legs  black,  wholly  with  light  colored  pile;  front  iinn^  ^]^^, 

middle  tibije,  except  a  brown  ring  in  the  middle,  and  the  hind  tibia;  anil  f\^^, 

base  and  end,  jvnd  all  the  tarsi,  except  the  last  two  or  three  joints  (wliifonj  froi 

are  brown)  luteous.     Hind  femora  considerably  thickened,  the  lii-^ijjgj^  j, 

metatarsi  only  slightly  so.     Wings  hyaline  on  the  basal  part,  distiiic:    ji^-o  si 

clouded  with  brownish  across  the  middle,  becoming  less  strong  town 

the  end  and  posterior  nart;  stigma  jellow  ;  outer  ..nterior  angle  oft 

first  ])osterior  cell  acute,  briefly  petiolate,  the  cross-veins  at  outer  p 

of  the  first  posterior  and  discal  cells  nearly  parallel  with  the  poster 

border  of  the  wing ;  posterior  angle  of  first  posterior  <!ell  obtuse,  w'"  "  "7""",' 

stninp  oi  a  veni.  . 

Two  specimens  from  Mr.  Eugene  Keen,  collected  in  Fairmount  Par^       iT,'. 

Philadelphia.  ^  ' 

Piplxa  (Pif 

Pipiza  uigripilosa.  n.  Hp.  Sabital, 

ZTfli/ifflf.— Pennsylvania!  '•  ^^^'" 

$.   Length  5.5 '"".     Deep  shining  black,  with  black  pile.     Pile  on  1*^^^*'""^ 

posterior  i)art  of  the  vertical  triangle ;  the  post-orbital  cilia  and  t^'*^^j  ^''*^^ 

I)ileof  the  eyes  more  brownish  black,  in  some  views  brow L^ish.    AnteiiL'®'^'''''  '' 

black,  third  joint  brownish  red,  subcordate,  scarcely  twice  as  long  '^"•*^5  th( 

|Diddk'.    . 

„hree  or  f< 

.helowor 


Plplsa  pis 

Mabitu 

«.    LC! 

',WaiBhin« 


wide.     Pile  in  front  of  dorsum  of  thorax  in  some  views  more  browi 
Abdomen  wholly  with  short  erect  black  pile,  except  along  the  b' 
ders  there  may  be  a  few  light-colored  hairs.    Legs  black,  the  tip  oft: 
femora,  the  front  and  middle  tibiae,  except  a  brownish  ring,  and  t;"****"'; 


base  and  tip  of  hind  tibiae,  and  all  the  tarsi,  excej)t  the  brownish  tv****  *'^"'fi 
or  three  terminal  joints,  luteous;  jnle  chiefly  black,  on  the  under  sii  *^®5^'I 
of  the  hind  femora  more  brownish  or  obscurely  yellowish;  hind  luei'ff  *  '" 
tarsi  only  a  little  thickened.  Wings  hyaline,  first  posterior  cell  shi'"'*^  '"*"^' 
petiolate,  the  angle  acute ;  the  cross- veins  at  outer  part  of  the  flrst  pc^il^^f'  "^ 
terior  and  discal  cells  nearly  parallel  with  the  hind  border  of  the  wiii,***^^^"^  ^ 
stigma  yellowish.  ^°  ^P^ 

One  specimen  collected  by  Mr.  Eugene  Keen,  in  Fairmount  Par**'®     "^"^ 
Philadelphia.  ^^ 

^piudiviE 


■1 


'i\ 


"^ 


8EUM. 


SYNOPSIS    or    xXOUTlI    AMIUilCAN    SVRPHIUvi:. 


29 


Pipiza  pistica,  II.  si>. 

llubitat. — ('uiiiit'cticut ! 

$  .  Ii(Mi;;tli,  7.;")""",  Antennae  black,  tlie  third  Joint  yellow  along  the 
f  brownish. II  Jq^j.,.  ^j,|j,.  j,,  .v^iiape  oblonfi',  more  than  twice  as  loiiy  as  wide.  l'a(!e 
shape  obtii>f^jlQlly  ^y],j(^^,  pilose.  Front  bbutk  pilose  below  and  above,  across  the 
tie  longei' til  mj^,]l,.  wiiite  jtilose.  I']ycs  whitish  pilose,  l)nt  vailable  in  diireient 
uish  rellectii  j.0||j»,.fj„„j^^  appearing;  bhudcisli.  l*ile  on  the  orbits  behind  white, 
ept  just  ahi  rpiioj.jiy^  r,^  j^l,,,  |„.;i,|  .,,„|  nbdonien,  shininj?  metallic  black,  with  a  lijrht 
autity  of  bl;ig|igg„ji^],  n.tlection,  moderately  lonj,',  white  pilose.  Abdomen  white 
the  second  ii  piloisc,  except  on  the  posterior  margins  of  the  second  and  third  sejj- 
-bands  of  slimQuij,^  where  it  is  very  briefly  black  i)ilose.  Lejj;s  black,  white  pilose, 
abundant  tli|;||^  ^ip  of  all  the  femora,  the  rather  broad  base  of  the  four  front  tibiie, 
pile;  front  iianii  the  immediate  base  of  the  hind  tibi.e,  the  tip  of  four  front  tibiie, 
le  hind  tibiif  and  t|,(,  hasal  joints  of  tlu'ir  tarsi,  yellow,  the  last  two  joints  of  the 
ie  joints  (wiiifoor  front  tarsi  blackish;  hind  metatarsi  very  distinctly  thickened, 
ened,  the  luWings  hyaline,  the  stigma  lifrht  yellow, 
part,  distiiif  Two  sj^'cimens,  dune  10,  N'ew  Haven. 
*  strong  t()\v;i 
ior  angle  ot't 
IS  at  outer  \ 


Piplsa  pisticoides,  n.sji. 

Mabifat — White  Mountains! 

^.  Length,  (J""".     A  single  specimen  taken  near  the  base  of  Mount 


ciir 


th  the  poster™. .  ,.^        .  ^  ,  iitj-.-  ii*. 

,    ,  .  .Waohnigton,  August  1,  resenducs  P.  pistica  verv  much,  but  seems  evi- 

1  obtuse  w  i-i      7       <-■         >  X  •.  ; 

'       ilently  <lirterent.    The  third  joint  of  the  antenufe  is  orbicular,  as  broad 
^  r^  islong;  the  pile  throughout  is  shorter,  on  the  abdomen  scarcely  Uis- 
3ernu)le  ;  the  size  is  also  distinctly  smaller. 

Plplsa  (Pipizella)  pulchella,  ;i.  k\k     (IMati'  11.  Iiij;s.  1,1a,  1  h.) 
Hahitaf. — Connecticut,  ^[assachusettsl 
9.  Length,   ~>.'i"'"'.     Shining,  gn-eiiish  black,  clothed  with  not  very 


e.    Pile  on 


.ibnndiiiit  nor 


nearly  whiter  pile.     Front  and  face  wholly  white 


cilia  ind  t^'^^j  ^^^^^  former  with  a  small  triangular  spot  near  each  orbit,  the  lat- 

sli     Anteiii®' T^'^''  "'  "'i'"row  orbital  margin,  white  i)ollinose.     Post  orbital  cilia 

Ivice  'IS  loii"^^^^'  ^''^'  ^^^^^^  pile  of  the  eyes  dark.     Face  gently  convex  near  the 

more  brown i°^*^^'^'"    Antenna'  elongate,  but  shorter  than  the  fa(!e ;  the  third  joint 

j  J  ,  i.jj^,  i^^,hree  or  four  times  as  long  as  wide,  black,  the  third  joint  yellowish  on 

the'tin  of  t^®^^^^'^"'  ^''^'^'  part.     Scutellutn  with  a  slendtu'  deep  groove  before  its 

rinff   and  t'^*1f^"*    Abdomen  very  short  pilose,  on  the  i)osterior  part  of  the  second 

brownish  t''°^  third  segments  black,  elsewhere  neai'ly  white.     Legs  blaitk,  white 

the  under  .'<ii'^^*^®'  ^'I^  ^^  "^'  ^^^'  ft'i"<>i"''i>  I'^se  and  immediate  tip  of  anterior  tibia;, 

h'  hind  met***'?  *'^  hlud  tibiai,  first  two  joints  of  anterior,  and  the  middle  two  of 

rior  cell  slu'™^  tarsi,  yellow;   hind   metatarsi  considerably  thickened.     Wings 

of  the  first  IK''*'^^^'  '^y^^"'*-';  I'lst  section  of  fourth  vein  angulated  in  the  middle, 

j,j.  yf  ^jjg  ^yi,i:OSl^rior  cro.ss  vein  rectangular;  stigma  luteous. 

Tf  0  specimens,  Connecticut,  .Massachusetts.    The  convexity  of  the 
lirmount  Pai**® '®  "°*  '^^  strong  in  one  specimen  as  is  figured. 

ADDITIONAL  NORTH  AMERICAN  SPECIES. 
Iplaa  divisa  Walker,  Traus.  Ent.  Soc,  N.  Ser.,  iv,  156.— Vera  Cruz. 


80 


BULLETIN   31,    UNITED    STATES   NATIONAL   MUSEUM. 


►I  U 


PSILOTA. 

I'Moia  MoiK'^n,  Sj'Mt.  IJcmrlir,,  iii,  vJo*!,  \r^'ii. 

Small,  hliuik,  nitlier  thickly  pilose  siiniit's.  Eyes  pilose,  contiyiin 
in  the  male.  Aiitenme  :  First  two  Joints  short,  third  more  or  less  el* 
^ated,  arista  dorsal,  basal,  bare.  Face  pilose,  the  epistoina  prodm. 
forwards.  Abdomen  short,  broad.  Hind  t'emorii  a  litth^  thickcih 
Wiiifjfs  as  in  Myiolrpta;  mar;;inal  eel!  open;  anterior  cross-vein  in 
ba.se  of  discal  (;ell;  third  vein  nearly  si rai};ht;  false  vein  obsolete.  'i,\ 
of  genns  /'.  anthravina  Mei/^ren,  Europe. 

In  the  type  of  this  jjjenns  the  fiice  is  eont^ave  from  the  antenna-, 
our  sinj^le  American  species  the  face  is  convex  abov«'  and  concave 
low;  ♦ne  third  joint  of  the  antenna*   is  also  more  elongate.     These  i 
ft^ences  are,  however,  not  important  enou{j;h  to  exclude  our  speciew, 


I         1 


I 

[1, 1 


Uabi 

9.  I 

Base  (»l 

iNth  bl 

KBiacI 

b^low, 


FsUota  buccata. 

I'ipha  hiiir/itd  Jliicfinnrt,  Dipt.  Exot.,  ii,  "i,  107;  i>l.  xviii,  li^.  2. 
I'lilitla  Jlav'id'qnnnk  Miic<iuiirt,  Dijil.  Exot.,  W  Siij)!)!.,  117  ;  pi.  v.  li^.  .'>. 

Habitat. — United  States!,  Carolina  (Mac(i.). 

$,  5  .  Len};th, '<  to.S""".   Shininj;,  metallic  greenish  black.    Ileadsl 
ing  black,  front  ami  face  clothed  with  white  i>ile.     iVntennte  bin 
ish  brown,  the  second  joint  deep  red  or  nearly  black;  not  as  longuK 
face.     Dorsum  of  thorax  and  scutellum  in  the  male  clothed  with  nil    iNth  tv 
abundant,  erect,  somewhat  yellowish  idle;  in  the  f<'Miale  shorter,!   I<lij,'tli 
abundant,  and  more  whitish  ])ile  ;  pleunc  with  whitish  pile.    Abdoi:   IfljDyert 
shining  bionze  black,  in  the  male  with  yellowish,  in  the  i'emale  ii.   Wjfrck,  ( 
whitish,  erect  pile.     Femora,  except  the  tip,  black  ;  tibiic  and  tar.si    t|ie  sen 
low, except  that  the  uuddle  portion  of  the  nnddle  and  hin<l  tibia*  is  bro   S^'iani 
ish  or  blackish,  and  the  ternunal  joints  of  all  the  tarsi  are  blael;   ^ntiuf 
"VVings  nearly  hyaline;  on  the  outer  part,  especially  in  front,  wii  Wte  til 
brownish  cast.  thickeiH 

Two  specimens  in  the  Loew  type  collection  at  Cambridge,  lab  oUivatc 
PsUota  Jiamdlpennis,     I  have  no  doubt  that  this  species  is  Pipiza     Wftck, 
cata  ;  that  it  is  Miia^xvAvi^ »  Psilota  Jiavidipennis  is  doubtful.    The       Tran> 
scription  of  the  latter  is  as  follows:  C^mbr 


Psilota  flavidipeunis. 

Puihfd  flaridipcnnis  Macqnart,  Dipt.  Exot.,  iV  Suppl.,  97  ;  pi.  v,  fig.  5. 

'"'•  Nifjra,  Jiavido  tomentosa,  metatar,so  teataceo.    AUs  JlavidisP 
"  Long.  31.  (G"""),  S  .    Face  a  legcr  duvet  gris,  saillante  dans  le  ba> 
pen  convexe  dans  lehaut;  epistomesaillaut.    Front pro6minent.   An 
lies  noires ;  premier  article  un  peu  allonge,  troisieme  oblong.    1 
veins  de  jaunatre.    Thorax  d'un  noir  luisant,  a  polls  jauuatres. 


'I 


Chr 
Ort, 
Can 
Cry 


i9mall. 


domen  uu  peu  plus  6troit  que  dans  le  P.  anthracina,  d'uu  noir  ina  WArking 

genera  I 


i 


1 


9EUM. 


SYNOPSIS   OF   NORTH    AMKRICAN    SYRPHIDiE. 


31 


A  poils  JauntareH;  quatri6ino  M«'j,'ment  liiiHiUit.    Pieds  noirn;  brt.sc  <lo8 
jginhtfsot  in6tiitarse  tewtacils.     Ailc8  «l'im  janne  nmssatre  assez  pille." 

"  riiihulelphie.    C«tto  espjico  ewt  iiiteriuC'diairo  ontro  los  Psilotet*  et 
Ics  FipizeM." 

LEPROMYIA,  NOM.  NOV. 

r.epidomiiia  Loew  (nnii  HiKi>t),  Cmitiir.,  v,  \\8,  lH(i4. 

,,  Small,  black,  nearly  bare  Npeiiies,  tlui  thorax  aid  borders  of  the  ab- 
cross-vein  in  ^men  with  sparse  squainula'.  Iloatl  like  that  of  Chrymtiastrr,  but 
obsolete.  1}  without  faitial  or  frontal  wrinkles ;  antenna' elonjjate.  Abdinnen  short, 
broad.  Anterior  cross  vein  of  the  \vin<jfs  near  base  of  discuil  cell,  third 
vein  nearly  strai^dit,  last  8ection  of  fourth  vein  sinuate,  inarfiinal  cell 
open.  All  th«!  femora  moderately  thickene<l  and  with  rows  of  short 
ipines  below.    Type  of  genus  L.  calopvs  Loew,  West  Indies. 

Ziapiotnyia  calopus. 

lApidomiiia  rulopiia  Louw,  Centur.,  v,  38, 
Habitat.— Cuhii  [hw.)\ 

9.  Lenj^th,  .J""".  Black,  thinly  clothed  .v'ith  whitish  tomentum. 
Bftse  of  the  tibiae  and  the  first  two  joints  of  the  tars=  white;  winj^s  spotted 
mth  black. 

|>Bla«!k,  rather  bare,  somewhat  shinin;,'.  Front  plane,  a  little  broader 
bilow,  with  a  median,  subobsolete  impressed  line,  and,  on  each  side, 
>tlie«l  with  lilt  Ulth  two  whitish  pollinose  spots.  Antenuie  narrow,  about  e(pial  in 
•lie  shorter  1  l^DtJth  to  the  face;  tirst  two  Joints  reddish,  the  second  one  a  little 
i)ile.  Abdoi;  UijDy'er  than  the  first,  and  fuscous  on  its  ui)per  part ;  third  Joint  eloiijuate, 
the  female  II,  blftck,  the  base  bolow  reddish ;  arista  basal,  bare,  fuscous.  Thorax  with 
»ia'  and  tarsi  tife  scutellum  and  pleune  thinly  but  evenly  clothed  with  minute  whitish 
id  tibia;  is  bro;  ■^uamuhe.  Abdomen  plaiu',  the  sides  and  tij)  wiMi  white  squainula', 
si  are  black  luting  on  the  disk.  Lejjs  black,  shininji,  somewhat  bluish  ;  base  of 
11  iVoiit,  wit.  WiB  tibiae  and  the  tirst  two  joints  of  the  tarsi  white;  all  the  femora 
thickened,  armed  below  with  a  double  series  of  small  spines  ;  tibiiC  sub- 
olftvate,  the  hind  iiair  moderately  arcuate.  VVinys  hyaline,  spotted  with 
black. 

Translation  from  the  original,  compared  with  the  type  specimen  at 
Obmbridge.    See,  also,  ai>])endix. 


ose,  con ti gill. 
ire  or  less  el 
toma  pntdiii 
ttle  thicken. 


e  antenna', 
ind  concave 
ate.     These  i 
i  our  species. 


\.  V.  ti^.  r>. 

ack.  ITeadsL 
Anteniiie  bhv 
iotas  huigan 


111  bridge,  lalx 
es  is  Pipizd 
i.btful.    The 


1.  V,  fig.  & 

lavldis.^^ 
te 


CHRYSOGASTER. 


Chri/fiogagter  Moi\!;en,  IIMj-cm-'n  Miii?iiziii(!,  ii,  'i7\,  1803. 
Orthom-nra  Macqiiiirt,  Hist.  Nat.  Dipt.,  i,  ;'>(;:{,  Ih:54. 
Cam])toncura  Kondani,  Dipt.  Ital.  Frodr.,  ii,  li-,j7. 
Cryptimnra  15i{;<»t.  Rpv.  ct  Majja/.  ilc  ZdoI.,  l.-^.VJ. 


i  dans  le  ba? 
Eminent.  An 
le  oblong.    ^ 

jauuatres. 

d'uu  noir  ma  OMWkings,  excei)*  oji  the  legs,  distinctly  characterized  from  all  other 
g€aiera  by  the  front  in  the  female  having  transverse  lateral  wrinkles. 


|3mall,  metallic  green  or  blue,  or  black  species,  wholly  without  ye'low 


32 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


M 


iii'M; 


!    •' 


ri     I''     M 
.1*    'I 

■'    !■  il 
I''    ', 

!'  .^ '  \ 


•  I 'I 


II 


;  ! 


Head  hemispherical,  rather  hirge,  broader  than  tlie  tliorax.  Antenna 
not  longer  than  the  head,  varying,  sonietinies  the  first  two  joints  ven 
short  and  the  third  nearly  round,  frequently  with  the  third  joint  eloi 
gated,  as  also  the  second;  arista  basal,  bare.  Face  in  the  sexes  usuiill; 
diftereut  in  i)roflle,  in  the  male  generally  less  concave,  the  epistoiiii 
less  ju'ojecting,  and  sonjetiines  with  a  distinct,  more  or  less  prominen 
convexity  near  tlie  middle;  in  the  femah',  usually  deeply  concave  ai^ 
the  epistoma  salient.  Eyes  in  the  male  contiguous  (in  some  exotic 
species  bi'oadly  sepjifated).  Frontal  triangle  sometimes  swollen  am 
with  a  distin(!t  pit-like  depression  in  the  middle.  Front  in  the  fenial^ 
with  lateral,  transverse,  irregular  wrinkles,  in  the  middle  usually  a  slec 
derlongltudinal  space,  smooth,  bounded  on  each  side  by  a  linear  groov( 
over  the  anteniue  usually  with  a  transverse  arcuate  groove,  below  whic: 
the  space  is  smooth.  Scutellum  gently  thinned  above  near  its  bordci 
sharp,  sometinu's  wrinkled  on  its  disk.  AbdonuMi  short,  oval,  flattens! 
the  borders,  howevei',  rounded,  not  thinned.  Legs  moderately  stroiii; 
simple,  the  hind  lemora  scarcely  longer  or  thicker  than  the  otlit'i> 
Marginal  cell  of  wings  ojien,  third  vein  strainlit,  anterior  cross-vein  cm 
siderably  before  the  middle  of  the  discal  cell,  rectangular,  the  last  sn 
tion  of  the  fourth  vein  tVecjuentl^  more  or  less  bent,  always  joining  tli 
thii'd  vein  considerably  belbre  its  tip,  often  bent  in  so  that  tin;  tip  is  k'< 
remote  from  {hi:  anterior  cross-vein  than  is  the  posterior  angle  of  the  a! 
whicli  it  closes;  the  cross-vein  at  outer  end  of  discal  cell  also  joins  tli 
fourth  vein  considerably  before  its  angle,  the  false  vein  frequently  ii 
tirely  wanting,  never  very  distinct. 

.^iy  reasons  for  uniting  Orthoneiira  with  this  genus  are  explicitl 
enough  given  by  Loew  (8tctt.  Ent.  Zeit.,  1843).  It  is  true  this  authi 
and  Schiller  did  afterwards  make  use  of  Orthoneuya,  but  that  the  foriiit 
did  not  have  a  very  c'ear  idea  of  the  genus  is  sulliciently  shown  by  li 
G.  nigripen,  described  in  tbt;  male  as  Chrysoijaster  and  in  the  female  ;. 
Orthoneura  ustulata  The  character  these  authors  used  was  the  mamit 
of  termination  of  the  fourth  vein. 


TABLE  OF  SPECIES. 

1. — Base  and  tip  of  tibiae,  or  at  l«;ist  t'nut  two  joiuts  of  tarsi,  yellow  or  yellowish  re: 
lastsection  of  fourth  loiif^itiidiiial  vein  rcctaiiffular ;  auteiiutD  elongate  . 

Leffs  wholly  black  ;  liist  section  of  fourth  vein  curved  or  bent 

2. — The  last  section  of  the  fourt!i  •  ain  joins  tlio  tliird  bevond  the  tip  of  second  vi': 
rectaiif^nlar,  with  a  stiniip  of  a  vein  in  the  iuid<lle  ;  second  joint  of  autciii 

nearly  as  lon}^  as  the  third  ;  eyes  with  linear  markings nitic 

The  last  fx-tion  of  fourth  vein  joins  the  third  opposite  or  before  the  tip  of  the  > 

ond  ;  (lisle  of  alidonien  opaque 

3. — Eyes  witli  linear  markings bellui 

Eyes  uuicolorous 

4. — Abdomen  broadly  oval ;  wings  with  brownish  clouds plotipeni: 

Cross  veins  of  wings  not  clouded pulcheL 


} 


lEUM. 

IX.    Autemia 
vo  joints  \en 
inl  joint  eloii 
sexes  nsni\ll; 
the  epistoii): 
?ss  proinineii 
r  concave  aiii 
11  some  ex()tv 
8  swollen  itiii 
in  the  fenial 
nsually  a  slen 
linear  gioovt 
e,  below  wliic. 
,ear  its  bordci 
^val,  flattens! 
erately  stroii;; 
un  the  otliei' 
cross-vein  i;ol 
r,  the  last  set 
ays  joining  tli 
ht  the  tip  is  k'> 
tngle  of  the  ci! 
I  also  joins  tli 
frequently  ti 

are  explioitl 
lie  this  aut'.i' 
lat  the  foMiit 
sliown  by  b 
the  female  ;. 
vas  the  maum 


or  yellowish  re: 
uiic  oloiigatc  . 

;ip  of  aecond  vc: 

[joint  of  anti'iii 

.    .    .    nitic 

the  tip  of  the  > 

.    .    .    bellu: 

.     .    plotipeni 
.     .    .    pulcheL 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHID/E.  33 

5.— Third  joint  of  iiiitiMiniP  nearly  rounded 7 

Third  joint  elonj^iite,  or  :it  least  twice  as  long  as  wide  ;  lip  of  fourth  vein  less 
remote  from  anterior  eros.s  vein  than  is  the  posterior  angle  of  the  cell  in- 
eluded      6 

€.— Third  joint  of  iinteniiie  elongate Stigmata 

Third  joint  of  antenme.  short nigrovittata 

7. — rront  of  female  lij^hliy  rugose lata 

Front  of  female  strongly  rugose nigripes 

Chiysogasternigripes.     (Plate  II,  ligs.  10,  10a.) 

ChriiHOijnHtfr  nidri/icH  Loew,  Centnr.,  iv,  till  (male). 
Orthoiieiira  iixliildlit  I.ocw,  ('entur.,ix,  80  (female). 
,'  Chriino'/dxlcr  .tuiilliens  Walkrr,  List,  I'tc.,  iii,  57"^. 

I[((bitat. — Connecticnt,  Jfew  York,  New  Jersey,  North  Carolina!. 

9,S.  Lcngtli,  7  to  S""".  Eyes  niiicolorous.  Legs  wholly  greenish 
black.  Wings  a  little  blaekish,  more  nearly  hyaline  neai'  the  base  and 
posterior  ])art,  more  or  less  clouded  on  the  onter  i)art,  especially  in  the 
end  (►f  the  marginal,  sub-marginal,  and  tii'st  posterior  cells;  stigma  di- 
Intely  browinsh ;  the  bust  section  of  the  fourth  vein  very  oblique,  a  lit- 
tle convex  outward  near  the  angle,  and  then  more  broadly  concave,  the 
tip  joining  the  third  vein  in  a  right  angle.  First  two  joints  oi"  anti-nnae 
▼eiy  short,  icddish  yellow  ;  the  third  round  or  a  little  oval,  reddish 
yellow,  the  ui)i)er  bolder  darker.     Head  wholly  shining,  except  a  broad 

White  dusted  cross-band  on  the  ui>j)er  ])art  of  the  face  just  below  the 
antenme 

6  .  Head  metallicbluish  green,  shining;  antennae  verysmall.  Frontal 
tiriangle  very  large,  swollen,  with  a  longitudinal  deinession.  I'ace  in 
protile  gently  concave,  distinctly  tuberculate  below  the  nnddle,  the 
epistoma  not  at  all  jn'ominent.  Dorsum  of  thorax  oi>aque  black,  with 
niimci'ous  sDiall,  greenish,  more  shining  si)ots,  which  on  the  sides  be- 
Wme  <!ontlueiit,  forming  stripes.  Disk  of  abdomen  deep  opaque  black, 
the  margins  shining  brassy  green,  except  at  the  incisures  of  the  second 
Ittid  third  segments,  where  the  black  may  extend  narrowly  to  the  mar- 
gin. 

2  .  Deep  bluish  green,  the  head  and  thorax  sonu'times  a  deep  cobalt 
blue.  Face  very  concave  and  ])rondnent  below,  in  profile  very  dis- 
«innlar  to  that  of  the  male.  Third  joint  of  the  antennje  much  larger 
than  ill  tlu'  male.  Front  broad  and  long;  on  the  sides  strongly  rugose,  a 
narrow  longitudinal  sjiace  in  the  middle  smooth.  Abdomen  shining,  but 
less  so  on  llie  disk,  the  first  segment,  the  liind  margin  of  the  second 
9nd  third  segments,  and  a  rather  broad,  less  distinct  strip*',  reaching 
nearly  to  the  tip  of  the  fourth  segment,  oi)aque  black. 

Four  males  and  live  females.  In  four  of  my  specimens,  both  male  and 
ftinale,  like  specimens  Loew  described,  the  second  and  third  .segments 
of  the  abdomen  are  in  large  part  sordid  yellowish,  an«l  the  wings  may 
almost  wholly  lack  the  blackish  cloiid.^.  All  but  one  of  my  si)ecimen8 
were  taken  together  from  the  same  bush  of  PrnnuN  vinibiiaiius  on  June 
25.    That  they  belong  together  I  do  not  have  the  slightest  doubt.    Very 


34 


BULLETIN  HI,  rXITED  STATES  NATIONAL  MUSEUM. 


I  I 


i      \ 


il 


siiiiiliir  (lilT('ron(!t's  between  llie  sexes  occur  in  C.  riditatur  of  Europe, 
The  neuratiou  is  precisely  alike  in  both  sexes;  that  Loew  described 
tl»ein  uinler  two  ;;enei\n,  is  suflicient  evidence  of  the  valuelessness  of  tlii' 
characters  upon  whicli  Ortlioneura  is  based. 

It  seems  very  probable  that  Walker's  Antitheiin  is  this  species,  yet  it 
is  not  at  all  (iertain,  and  it  would  be  ini])rudint  to  substitute  the  name; 
nor  should  it  be,  indeed,  were  the  type  to  jnove  this  suppotiition  correct, 


tbc.  Ii 
theb 
the  a 
with 
first  I 
of  a  V 
Foi 


Chrysogaster  nigrovittata.     (I'lsitf  II,  liiiH.ll,  1-i. ) 

Oftiioneiirn  iiif/rovittata  Loew,  Zeitselir.  (iir  Niittirw.,  187(i,  378. 
L'hrijtioguster  iiidrovUiatnn  Willi.stoii,  Proc  Am.  I'liil.  Soc,  xx,  H04. 

Habitat. — Washington  Territory,  California,  Colorado!. 

5  ,  $  .  Leuffth,  5™'".  Antenna'  yellowish  red,  the  liist  Joint  and  upjtei 
l)art  of  third  dark  or  blackish ;  the  iirst  two  joints  short,  the  third  oval, 
Face  bbiish  greenish  black,  considerably  projecting  below;  on  the  uj) 
per  part  with  delicate  transverse  stria';  a  narrow  silvery  white  cros,> 
band  of  dust  extends  between  the  eyes  immediately  below  the  anteniui' 
in  the  middle  less  distinct.  Frontal  triangle  pitted  in  the  middle,  some 
what  swollen,  with  black  pile.  Eyes  unicolorous,  contiguous  in  th 
male  for  a  considerable  distance.  Front  in  female  rugose  on  the  side!«, 
narrowed  above,  in  the  middle  with  a  slender  smooth  longitudinal  space 
])orsum  of  thorax  linely  ])unctulate,  deep  green,  with  four  blacki.sl  TT- „  V 
stripes,  in  some  retlections  a  little  copi)ery.  Abdomen  deep  greenisli 
sub-opaque,  tlie  margins  shining  metallic.  Legs  wholly  black,  with  t 
greenish  cast.  Wings  with  a  slightly  blackish  tint;  stigma  dark  bi'owi, 
ish;  cross  vein  at  outer  i)art  of  discal  cell  nearly  straight,  the  last  se(.ti(ii 
of  the  fourth  vein  bent  inward  near  the  middle,  the  anterior  end  joiniii;  V~  ','"' 
the  third  before  the  tip  of  the  second  vein.  „.,„.  , 

Six  s])e<jimens  from  California,  two  from  AVashington  Territory,  ati(    . . 

four  from  Colorado  (H.  K.  Morrison).  ta-'S 

^  '  Dixte 

Chrysogaster  stigmata.     (Plate  II,  lij;.  «.)  additio 

Chri/ntx/dHtc)-  ulii/iiKitiiii  Williston,  Proc.  Am.  Phil.  Soc,  xx,  :)03.  (1661—1' 

Or  I  ho  tie  lira  niiniosa  Bigot,  Aniiules  Soc.  Ent,  Frauco,  1864,  55»>.  of  the 

//^,?,/MY.— California!.  to  the 

^  ,  9  .  Length,  (5  to  7""".     Antenna:!  black,  about  as  long  as  to  the  ti;  is  usual 
of  ei)istonia,  the  second  joint  ab(iut  one-third  as  long  as  the  third.    F;ii  imen  w 
deep  shining  green,  witli  delicate  stria}  on  the  up])er  part,  snu)oth  lif  Clirysog 
low,  with  sparse  white  pile,  and  a  silvery  triangle  above  near  the  oil)it 
gently  convex,  the  lower  part  abruptly  and  moderately  i)roduced  dowi 
nards  and  forwards.     I-'rontal  triangle  like  the  face,  only  slightly  swu 
len,  with  a  distinct  ])it  in  the  middle  above  the  antenna';  vertical  ti 
angle  greenish  black,  obtuse  in  front.     Front  in  female  broad,  with  vc 
ilisiinet  lateral  transverse  furrows.     Dorsum  of  thorax  deep  shiiiii:      tr  i  ^ 
green,  with  short  whitish  pubescence.     Scutellum  distinctly  8'i'<">^'  k;*»i 


Obrysi 
Bat 

^, 
third 
lengtl 
deep  c 
and  a 
epistoi 
Rtraigl 
Prontf 
narrov 
de!r,  lo 
Dorsui 


strijx'.s 
black  c 

metal  lii 
two  joi 


CIn 

Cri 

I'iU 

Ort 

On 
1 


before  its  tip.     Abdomen  Hat,  broadly  oval,  with  delicate  white  \n\\n- 


^,9. 


cence;  the  dorsum  black  with  a  greenish  cast,  the  sides  broadly,  n'U-h^j,  ^^i 


V    I* 


BUM. 

tr  of  Enroi)e, 
;\v   described 

[3SS1U'SS  of  tilt 

species,  yet  it 
ite  the  iiiUTit'; 
■ation  correct, 


14. 

)int  uinl  upi)H 
the  third  oval, 
w ;  on  the  n\) 
y  white  cros> 
'  the  juiteniui', 
;  uii<ldle,  some 
ig'uon.s  in  \h 
':  on  the  sides 
;itudinal  space 
I  four  blaclii.^1 
deep  green i.4 
y  black,  witii; 
i\ii  (hirlv  browi, 
the  last  se<.ti(ti 
ior  end  joining 

Territory,  am 


SYNOPSIS   OF   NORTH   AMERICAN    SYRPHIDiE. 


$$' 


mg  as  to  the  ti; 
he  tiiird.  Fiu 
ut,  smooth  bt 
near  the  orMt 
)roduced  dowi 
y  slightly  swn 
le;  vertical  ti 
•road,  with  vc 
X  de«'p  shiiiii 
inctly  groDVi 
e  white  imbf 
>s  broadly,  av. 


the  hypopyginin,  brassy,  much  shining;  in  the  single  female  specimen 
the  brassy  color  is  confined  to  the  sides  of  the  first  two  segments  and 
the  anteri()r  angles  of  the  third.  Legs  shining  greenish  black.  Wings 
with  a  distinct  blackish  tinge,  stigma  brown,  outer  posterior  angle  of 
first  i)Osterior  cell  rounded  or  obtu.^ely  angulated,  usually  with  a  stump 
of  a  vein,  the  tip  of  fourth  vein  strongly  bent  inward. 
Four  specimens. 

Chrysogaster  pulchella,  u.  h]>.    (Plate  II,  fig.  D.) 

Eabitat. — New  Hampshire,  Connecticut,  Canada! 
$,9.  Length,  4^  to  5""".  Antennae  yellowish  or  brownisli  red,  the 
tiird  joint  black,  except  at  the  base;  second  joint  less  than  half  the 
length  of  the  third,  the  whole  antenna  about  as  long  as  the  face.  Head 
deep  nietalhc  greenish  black ;  face  with  delicate  stria'  on  the  ui)per  half, 
and  a  small  triangular,  silvery  spot  near  the  eye  on  each  side  above, 
epistoma  considerably  protuberant;  in  the  male  the  face  is  more  nearly 
8tKiif,'lit  in  i)rofilc  with  a  short,  rather  deep  concavity  on  the  lower  part, 
l^ntal  triangle  not  rugose,  a  little  swollen  and  pitted  ;  front  in  female 
narrowed  above,  strongly  rugose  on  the  sides,  in  the  middle  with  a  slen- 
deV,  longitudinal  space,  and  the  lower  part,  smooth.  Eyes  unicolorous. 
Dorsum  of  thorax  strongly  metallic,  but  little  sliining,  greenish  Idassy, 
delicately  roughened,  with  four  coppery,  in  some  rejections  purplish, 
stripes.  Pleura*  brilliant.  Ab<lomen  not  very  broadly  oval,  oi)aque 
black  on  the  disk,  brilliant  metallic  on  the  margins  and  venter.  Legs 
metallic  black;  extreme  tij)  of  femora,  base  and  tip  of  tibia',  and  (irst 
two  joints  of  the  tarsi,  reddish  yeilow.  Wings  nearly  hyaline,  lamtly 
clouded  on  outer  part,  stigma  brown,  last  section  of  fourth  vein  nearly 
straiglit,  a  little  oblique,  so  that  the  anterior  angle  of  the  cell  is  slightly 
obtuse. 

Sixteen  specimens  from  the  White  Mountains,  N.  II.  (July  25-30),  two 
additional  ones  from  the  same  regions  from  Dr.  Oeorge  Dinunock 
(1561 -J),  and  two  others  from  Connecticut,  June  liO.  The  third  joint 
of  the  aiitennie  may  be  in  large  i)art  yellowish  red,  the  black  confined 
to  the  ujjper  border  and  distal  part.  The  last  section  of  the  fourth  vein 
is  nsually  (piite  straight,  but  .sometimes  sliglitly  sinuate,  and  in  one  spec- 
imen with  a  stump  of  a  vein  near  the  middle  on  the  inner  side. 

Chfysogaster  nitida.     (I'late  II,  tigs.  7,  To.) 

ChnjsodaHtcr  iiitkUin  WitMlornanii,  Anss.  Z\vt',i.  Ins..  ii,  116,  1. 
('iiiiitiiieiira  hkroytjiphica  Bigot,  Kev.  et  Magaz.  do  Zool.,  1859. 
I'anujits  aeneus  Walkoi",  List,  etc.,  iii,  54.">. 
OrtlioiHiira  hitrofib/iihica  Locw,  Cciitur.,  iv,  ,')H,  note. 

Or  I  hour  lira  iiilida  .Si'binor,  Novara  Expod.  Dipt.,  :5(W,  W;  Ostcn  Sacliou,  Cat. 
Dii)t.,  1-21. 

M(il>it((t.—  New  England,  Pennsylvania,  Virginia,  South  Carolina, 
Elttisas!,  South  America  (Schiner). 

i,  f .  Length,  4  to  .■)""".  Head  bra.ssy  metallic  black.  Antennae  longer 
than  the  face,  first  and  second  joints  yellowish  red  or  brownish,  the 


■■« 


!|! 


I 


^■Mii 


.1 

'If 

(I 

I',; 

iil 

;  i'  II 


['    111', 

tJI:; 


'      I 


^1; 


W 


3G 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSKUM. 


third  black,  only  ii  little  longer  than  the  second.     Face  nif?ose ;  concave 
on  the  lower  part,  the  epistonia  but  slightly  produced;  a  small  silvery 
spot  on  each  side  near  the  eye  above.     Front  in  female  narrow  above, 
strongly  transversely  rugose,  with  a  median  furrowed  longitudinal  line, 
Frontal  triangle  rugose.     Eyes  with  t«  median  straight  horizontal  lint 
and  two  vertical  labyrinthine  brown  lines.     Dorsum  of  thorax  nietallii 
green,  tinely  roughened,  with  four  longituilinal  stripes  of  a  coi)i>ery  (i; 
metallic  purple  color,  in  some  retlections  brown,  the  outer  ones  more  n; 
less  divided  into  two  nearly  contiguous  ones.     Scutellum  more  distinct  1; 
roughened,  or  lightly  rugose,  grooved  before  the  apex-     Abdomen  dei ; 
metallic  green,  roughened,  and  only  a  little  ohining  on  the  disk,  but  ili,> 
tinctly  so  on  the  margin  and  tip.     Second  and  third  segments  with  iiiyi 
or  less  distinct  (iross  bajids  of  a  more  oi)aque  color  in  tlont  and  behiiKi 
Legs  metallic  black;  knees  and  base  of  tibiai  and  their  tip,  and  h\> 
two  joints  of  tarsi,  reddish  yellow.     Wings  nearly  hyaline,  witli  slendt 
bliickish  spots  on  the  outer  cells;  stiguni  dilutely  brownish;  a  narm 
brown  cloud  irom  tip  of  second  vein  reaching  across  tlie  submargiin; 
ceil;  cross  veins  narrowly  clouded  with  brown;   veins  at  outer  i)aiti 
discal  and  first  posterior  cells  rectangular,  nearly  straight,  slightly  ;i: 
gulated  in  the  middle,  and  with  a  stumi)  of  a  vein  on  the  inner  sidf> 
tlu  fourth  vein  terminates  distinctly  beyond  the  tip  of  the  second. 
.Numerous  s])ecimeus. 


Dii 
of  th 

termi 

Chryc 

na 

elongi 

CODsi( 
long  ii 

consic 

anteui 

broad, 

ous. 

four  b] 

termeci 

moders 

green-] 

tarsi  re 

cinereo 

and  do 

in  the  t 

vein  at 

inner  si 

Six  s 

Chtysog 

C'li 

Eabii 

?.  B 

moderai 

with  well  marked  lateKii  rugosities  ;  eyes  with  irregular  narrow  brov  below tr 
markings.    Tlu)rax  and  scutelliim  bright  green,  scabrous,   with  ti' I^ugj-jj 
cojipcry  stripes.     Abdomen  oval,  a  little  darker  green,  sometimes  wr      Bronx 
a  bluish  cast,  opaque,  shining  on  the  borders,  lightly  punctulatc  broad  o 
the  posterior  part  of  each  segmei>t  sometimes  coppery.    Legs  bl;i(  gjag.  jjj 
ish  green,  base  an<l  tip  of  the  tibife  usually  narrowly,  and  the  bii'ttibercle 
jointsof  the  tarsi,  yellowish  red.    Wings  nearly  hyaline,  lightly  elotiil  iug  *)](» 
in  the  outer  cells,  stigma  brownish,  the  cross-veins  scarcely  cloud' black, 
last  section  of  the  fourth  vein  usually  straight,  rectangular,  joining  i  lately  si 

third  nearly  opposite  the  tip  of  the  second  vein,  clouded  with  brovcot) T 

th(^  cloud  either  extending  across  to  the  tip  of  the  second  vein  or  lui     A.  siu' 

or  less  interrupted  in  front  of  the  third.  with  thif 

Twelve  specimens,  Colorado  (Professor  Comstock),  California,  W;it    P.  S.— 

ington  Territory.  Oregon  .- 


Ohvysogaster  belliila.     (Plati'  II,  figs.  (5,  fki.) 

(  hrunoiiuatct'  huHaJun  WilliMloii,  Trans.  Aiult.  Pliil.  Hoc.,  xx,  304. 

Habitat. — Calilbrnia,  Washington  Territory,  Colorado!. 

(J  ,  2  .  Length,  4.5  to  6™'".  Antenna?  reddish  or  reddish  brown,  abn 
as  long  as  the  face,  second  joint  shorter  than  the  third.  Face  dc^ 
green,  lightly  rugo.^e,  white  pilose,  a  small  trii.ngular  white  silvery  sji 
near  each  oibit  just  below  the  antennie;  ei)istoma  moderately  ]»i 
duced   downwards.     Frontal  triangle   not  swollen,   rugose;  front  ( 


'^ 


[)se ;  concave 
small  silvery 
iirrow  iil>ove, 
itiuliual  line, 
nizontal  lint 
orax  inetallii 

II  coppery  o; 

ones  moic  ■>: 
lon'disitincliy 
J)(loin*'n  cU'i ; 
.  disk,  but  lii- 
nits  with  inoi 


SYNOPSIS    OF   NORTH    AMERICAN    SYRPHID.'E 


37 


DiflFers  from  C.  nitida,  which  it  closely  resembles,  in  the  second  joint 
of  the  antennae  being  shorter,  the  concavity  of  the  face  less,  and  in  the 
termination  of  the  fourth  longitudinal  vein. 


Chrysogaster  pictipennis. 

Orthoneura  inctlpenim  Loew,  Centur.,  iv,  58. 
£rtZ*?7MY.— Connecticut,  New  York,  New  Jersey! . 
5,5.  Length,  5.5  to  6""".  Head  metallic  bronze-green.  AntenusB 
elongate,  black,  the  first  two  joints  and  the  base  of  the  third  reddish; 
considerably  longer  than  the  face,  the  third  joint  not  three  times  as 
long  as  the  second.  Face  finely  wrinkled  in  both  sexes  ;  the  epistoma 
considerably  and  abruptly  projecting ;  on  each  side  of  the  base  of  the 
antennte  near  the  eye  a  triangular  silvery  white  spot.  Front  in  female 
It  and  neiiim.  jj^^jj^^^  markedly  rugose,  with  a  slender  median  furrow.  Eyes  unicolor- 
OU8.  Dorsum  of  the  thorax  moderately  shining,  finely'  punctulate,  with 
fonr  bronze-purple  stripes,  the  lateral  ones  abbreviated  in  front,  the  in- 
termediate ones  behind.  Scutellum  flattened.  Disk  of  the  abdomen 
moderately  shining,  the  margins  bronze-green  or  coppery  shining.  Legs 
green-black,  the  base  and  tip  of  the  tibijeand  the  firsttwo  joints  of  the 
tarsi  reddish  yellow.  Tegulas  white,  llaltoresdilutely  yellowish.  Wings 
cinereous;  the  discal  an<l  first  posterior  cells  with  brownish  si)ots,  stigma 


tip,  and  tir 
[',  with  slendi 
lish ;  a  narm 
w.  siibuiargiii;: 
t  outer  i)ait  i 
ht,  slightly  ii! 
he  inner  side* 
he  second. 


and  clouds  on  the  transverse  veins  fuscous ;  the  fourth  vein  terminates 


304. 


inthe  third  before  the  tip  of  the  second,  the  terminal  segment,  and  the 
vehi  at  outer  end  of  discal  cell,  straight,  with  a  stump  of  a  vein  on  the 
inner  side. 

Six  spe(!ipiens. 

lb  browu,abo'  Cluysogasterlata. 

rd.     Face  dc^  Chrnfot/aster  latus  Loew,  Centur.,  iv,  59. 

lite  silvery  s]!      JBabitat. — British  North  America  (Loew),  Oregon!. 

noderately  ]»       5  .  Bronze-black,  shining,  legs  wholly  of  the  same  color,  antennae  of 

o()se;  front  (moderate  size,  black,  third  joint  rotund,  piceous;  sides  of  the  front 

r  narrow  bro"  below  transversely  rugose;  wings  sublutescent,  stigma  and  veins  luteous. 

rons,   with  t"  Length,  7™'". 

sometimes  wr     Bronze-black,  shining,  with  sparse,  very  short  whitish  pile.     Front 
])un(!tulat('.  broad,  on  the  sides  below  transversely  rugose.    Anteuute  of  moderate 

ly.  Legs  bl;K  size;  third  joint  subrotuud,  fuscous,  arista  of  the  same  color.  Facial 
,  and  the  bii'  tttbercle  wanting,  epistoma  strongly  i)roduced.  Abdomen  broad,  shin- 
lightly  cloud- ing,  the  posterior  margin  of  the  last  segment  entire.  Legs  wholly  bronze- 
•areely  cloud'  black,     lialteres  and  teguire  lutescent.     Wings  toward  the  costa  di- 

|ular,  joiniuy  1  lately  sublutescent,  veins  a'nl  stigma  luteous.     (English  River,  Kenni- 
ed  with  bi'o  cot). — Translation, 
nd  vein  or  uu     A  single  lemale  sjiecimen  from  Mount  Hood,  Oreg.,  agrees  very  wo.'\ 

■with  this  des(!ription.    The  front  is  only  lightly  rugose  on  the  sides, 
alifornia,  "Wa;     P.  S.— An  examination  of  the  type  at  Cambridge  assures  me  that  the 
Oregon  specimen  belongs  here. 


'^ 


yi 


:; 


I) 


r  II  ■ 


If  '1  ;l 


rr> 


f|? 


, 


;    f 


'   \ 


38  BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 

CHILOSIA.  ^' 

OheUoHin  Meigcu,  Systoni.  Roschr.,  iii,  2%,  1822. 

CartOKjirphm  Bisot,  Annsil.  Sof.  Kiit.  dc^  Fninco,  1883, 230.  ••.— Se 

Sc 

IModt'rately  largo  to  rather  small  specie^,  metallic  black,  or  black     7,_.se 
green,  rather  thickly  pilose,  sometimes  almost  quite  bare.     Head  hemis 
])heri(!al,  scarcely  broader  than  tho  thorax.     Antennai  short,  small,  thin: 
joint  nmiKled  or  a  little  oval,  never  elongate,  with  a  baaal,  bare,  pnbcv  -^i' 

cent,  or  i)lnmose  arista.     Face  black  or  metallic  green,  rarely  sonic        ~^ ' 
what  reddish  below,  thinly  pilose  or  poUinose,  or  quite  bare;  a  little  ,^,,, 

below  the  middle  with  a  tubercle,  usually  thence  more  sharply  conca\v    ft— Pu 
to  the  sbghtly  projecting  oral  margin;  near  the  eye,  with  a  more  or  Ics 
distinct,  parallel,  slender  groove  ;    in  jjrofile  the  lower  part  sometiim  ^"' 

])ro<biced  downwards  and  forwards,  at  other  times  nearly  perpendiculm 
Eyes  i)ilose  or  bare,  contiguous  in  the  male.     Front  in  female  uovt  ifti—Lcci 
wrinkled,  usually  with  one  or  more  linear  dei)res8ions  ;  in  the  male  tli^  Leg 

frontal  triangle  more  or  less  swollen,  with  an  impressed  longitudin,; 
line  or  pit.     Scutellum    rarely  reddish  on  the  border,  sometimes  ulon. 
its  margin  with  a  row  of  bristly  hairs.     Abdomen    longer  than  tii 
thorax,  elongate  oval,  never  slendi'r ;  of  five  or  six  segments.     Ln-         aimI 
simple,  rather  weak.     Marginal  cell  of  wing  open,  third  vein  geiiti  J.<i— Leg, 
convex  anteriorly,  anterior  cross  vein  towards  the  base  of  discal  ci'l'         '^'i''' 
outer  anterior  angle  of  first  posterior  cell  always  acute.  13.— i<m 

In  Europe  this  genus  comprises  iu\irly  a  hundred  species,  and  it  j,,^^ 

not  i)robable  that  more  than  one-third  of  our  species  are  known.    Tli 

flies  are  inconspicuous  and  not  very  active.    The  sexes  differ  much.  I*— F.aci 

not  a  few  cases,  in  the  (jolor  an<l  length  of  the  i»ile,  in  the  color  an 

size  of  the  thir<i  antennal  joint,  and  in  the  markings  of  the  abdoniv:,.     *'" 

■which  ui  the  male  is  sometimes  velvety  opaque  on  the  disk  ;  moreovt         Y^n\\^ 

in  the  female  the  face  below,  the  humeri,  and  border  of  the  scutelluiiaft—Vein 

are  sometimes  reddish  or  yellowish.  ,  Vein 

(See,  } 

TABLE  OF  SPECIES. 

ChiloBia  ] 

1.— EyoH  i)iloHO     . ir  I  -J 

Eyes  I,', r. ?«'^»'^' 

2. — WiiJjj;.s  yellowish  at  base  ;  pile  on  dorsum  of  thorax  light  colored      ...  •  •      Jj 

Wiii;,fM  not  lightin-  at  the  h.-iso  :  the  veius  blackish  ;  pile  of  dorsum  black      ,  FftOe  wit 

3. — AntoDiiie  black  ;  eyes  densely  i>ilose;  faco  but  slightly  coucavo  in  protile  belwai^ds   Ii; 

the  antenn.e  (,?) occidentaliiQUj^g,    ,j 

Anreiinai  yellow;  eyes  ihinly  piloses;  face  considerably  concave  below  ""'  .jhAWl'- 

temiajC?)     (See  Appendix.) .     .     .     .    hoodiens  ^    -"^  " 

4.— The  laco  extends  considerably  below  the  eyes;  the  distance  from  aiitennie  to  P^^l^'-*'* 

of  tubercle  much  greater  than  thence  to  lowest  part;  above  the  tnli(rA.llteillia 

in  profile  gently  concave lasiophthaliblaek,  fin 

Face  not  mucii  produced  downward;  in  profile  considerably  concave  below '{{jg  midd 

auteumu „!i.u    ^ 

With  slioii 


'*^ 


gUM.  ^-  SYNOPSIS   OF   NORTH   AMERICAN   SYRPHIDiE.  39 

If. Anteniiiic  brown ;  third  joint  small,  snbqnadrato;  arista  baro ;  facial  tuborcle 

not  projecting  beyond  antennal  process ;  long  pilose    ....      Baroni 
Antenna-  light  reddish-yellow;    third  joint  rather  large,  oval;    arista  Jiiiely 
pubescent;  facial  tubercle  strongly  projecting;  pile  of  body  short. 

petulca  9 

^—.Soutelluin  w  ith  bristles  on  its  margin    . 7 

Scutelliuri  without  bristles  on  its  margin        H 

ack,  or  black       ^^ — Second  and  third  segments  of  abdomen  chiell;   opaque  black;  arista  pubcHcont 

Head  heillis  {Ueucoparca  i) pallipea^ 

i-t,  small,  thin;  trlstis^ 

bare   pubcf.  Abdometi,  or  at  hast  third  segUK-i.t,  wholly  shining 8 

'             '■  8. — Arista  pubescent ;  huincii,  scutcllum,  and  lower  part  of  the  face  with  more  or 

,  rarely   HOlllf  less  reddish  or  yellowish;  abdomen  wholly  shining       9 

l)are;   a  little  Arista  i)ilose;  body  without  light  markings 10 

larply  <'01K'ilV'  9l — Pubescence  of  the  arista  short ;  face  pallid  below  on   the  sides;  legs  luteous, 

•1  more  or  Ics'  IVmora  except  the  tip,  black leucoparea 

Pubescence  of  the  arista  rather  long;  face  with  a  yellowish  spot  on  eiicli  side 

art  aonmtiinr  ,  ,  "'  ^  n-       r, 

below pallipes? 

perpeiKliculiu  tristis? 

1  female  IK^vc  i©i.^L("gs  black lugubiis 

n  tlie  male  Tli*  Legs  in  larg<!  part  yellowish  ;  color  blackish  steely  blue,  wholly  shining  in  the 

i\  kino'itndill,  I'euuile,  in  the  mah'  a  sub-interrupted  posterior  opaque  cross-baiui  on  the 

^     ,  second  abdominal  segment cyaiiesceus 

■  H-— Second  and  third  segments,  at  least,  of  the  abdomen  in  the  malechiedv  opafjue 

iiger  than  tli.    ^-  ,,,,„.,. '.    .    12 

Ji'llients.      Ijfi;        •    Alulome!!  wholly  shining        14 

•<l    vein    ejeilti  JJIt*— l-.<'gs  lilack  ;  j)ile  of  thorax  Mack 13 

nf  ili^ciil  cell  Til)i!e  anil  tarsi  in  large  part  yellowish;  pile  of  thorax  lutescent  .    capillatac? 

13. — Fourth  segment  of  abdomen  ojtaque,  except  the  anterior  angles  ;    veins  of  wings 

black nigripeniiis 

)ecies,  and  it  Fourtii  segment  shining,  except  a  median  stripe;  veins  of  wings  in   1,'irge  part 

e  known.     Tii  yellowish versipellis 

differ  much.    Mii— Facial  tubendt^  very  obtuse,  not  produced  beyond  a  line  from  l)ase  of  auteuuie 
.1       /./-,lnv  '111  to  the  tip  of  ei)istoma;  the  coticavities  long  and  shallow    .    versipellis ^ 

.     ,11  Faisal  tubercle  projecting,  rounded 15 

T*ie  a,  2^^ — Femora  almost  entirely  hiteous parva 

nsk  ;   moreove:  Fcunora  Idack    .     .     .' 16 

the  SCUtelluili6.— Veins  of  uings  luteous  (?  cajjj?/«^(  9  ) comosa 

Veins  of  wings  black  (?  nigripenniv  9  )• 

(See,  also,  Appendix.) 

ChUosia  petulca,  n.  sp.     (Plate  II,  tig.  !,'>.) 

•    •    *    '      ^ahitat. — Washington  Territory  ! 

-,■■'"  9.     Length,  9""".     Shining  greenish  black,  tlic  hcaii  sliininy  black. 

irsum  black     .  Fsoe  with  a  baud  of  white  pollen  below  the  antenna',  extending  down- 

e  in  protile  bii  w^ds  narrowly  along  the  eyes ;  rather  deeply  concave  below  the  au- 

.    occidentatenjja3^  Ij,^.  tubercle  much  ntore  i»romiuent  than  the  antennal  process, 

ive  below  tbt"  ^8[|0ft,]y  .j,,,]  deeply  cciicave  between  it  and  the  oral  margin,  not  nuich 

m  "intennatoP*^"*'*'*^  downwards;  the  lower  border  of  the  cbeeks  gently  concave. 

iiove  the  tui»rA.ntenna'  light  reddish  yellow,  the  third  joint  large,  oval;  the  arista 

lasiophthaicblaek,  finely  but  distinctly  pubescent.     Front  with  whitish  dust  near 

concave  below  t^ii^  middle  y,,  ^\^^,  sides,  pile  short.     Eyes  pilose.     Dorsum  of  thorax 

with  short  whitish  pile;  on  the  post-alar  callosities,  and  border  of  scutel- 


<t 


^ 


'1 1 


40 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


.(( 


'Il>i| 


limi,  with  fine  black  bristles.     Abdomen  shining  dark  metallic  green  plenr 

jiile  light  colored,  very  short  and  thin.     Legs  brownish  black;  tipo  h^uik 

icnioia,  base  and  tip  of  ibur  front  tibiie,  yellow;  base  and  tip  of  liiiii  ^jth 

louutra,  and  the  four  front  tarsi,  yellowish  brown.     Wings  lightly  infu«  Joints 

rate ;  stigma  light  yellow,  veins  near  the  base  yellowish.  ^jti, 

One  si)e('imen.    This  si)ecies  differs  from  C.  Baroni,  to  which  it  i  browi 
liiost  neiirly  allied,  in  the  antenute  being  larger  and  lighter  colored,  th 
arista  pubescent,  the  facial  tubercle  smaller  and  much  less  projecting 
The  ])ile  of  the  front,  thorax  and  abdomen  is,  moreover,  much  shortc. 


Thi 

dlilos 


Chilosia  Baroni,  II.  sp. 

Jlabifnt. — California,  Washington  Territory  1 

S ,  9 .     Length,  7  to  9'"'".     Deep   shining  black,  with  moderate 
nliundant  whitish  pile.     Eyes  pilose.    Face   on  the  sides  somewli 
whitish  i)ollinose,  but  without  pile,  except  laterally  between  the  latere   arista 
groove  and  the  eye ;  near  the  middle  a  very  large  and  convex  tuberdf    the  sii 
not  extending  downward  much  below  the  eyes  ;  cheeks  not  broad.    A: 
tcnnai  small,  reddish  brown,  third  joint  nearly  square;  arista  biiri 
Frontal  triangle  somewhat  swollen,  with  an  impressed   longitudiii 
line;  pile  fuscous.     Front  shining,  clothed  with  abundant  whitish  pii 
Thorax,  on  tlie  ])ost-alar  callosities  and  the  border  of  the  scutellum,  wii 
black  l)ristly  hairs ;    the  pile  rather  abundant  and  long.    Abdoiiit 
everywhere  shining,  more  metallic  on  the  sides;  the  pile  rather  lot   the  tir 
and  abundant  on  the  sides  toward  the  base.     Legs  black;  tipof  fenidi    rather 
am!  tibiie,  except  a  black  ring,  yellowish  red,  the  hind  tibia?  sometiiii-   in  the 
viith  only  the  base  and  the  tip  reddish  ;  basal  joints  of  the  middle  tiir   dish  a 
and  sometimes  of  the  hind  tarsi,  yellowish  red,  the  terminal  joints  blac    black. 
ish.    Wings  nearly  hyaline,  in  the  region  of  the  cross- veins  yellowi.v       One 
faintly  blackish  toward  the  outer  part;  veins  at  the  base,  except  i; 
costa,  yellowish. 

One  male  and  three  female  specimens,  Washington  Territory  ai 
California  (O.  T.  Baron).  The  specimen  from  Washington  Territory 
larger,  and  the  third  joint  of  tlie  autenuje  is  reddish  yellow. 


Mat 
black 


iirom  1 
bDlt)w 
eye,  n 

green- 
Imii  oi 
all  .sle 


Chilosi 
(' 


Hah 
fornia, 

$ 
ately  I 
concav 
Axiten 


Chilosia  lasiophtlialma.     (Plat(^  III,  fi^'.  -i.) 

ChfUosid  lasiophthalmns  Willistoii,  Proc.  Am.  Phil.  Soc,  xx,  IW6,  1882. 

Habitat, — Colorado ! 

$  .  Length,  10  to  1!""",  Frontal  triangle  moderately  swollen,  v 
an  impressed  longitudinal  line,  and  light  yellowish  pile,  Antem  b|ack, 
brownish  red,  third  joint  not  large,  nearly  square;  arista  bare,  bl<u  l)i<jlow 
I'^ice  deep  shining  Idack,  with  yellowish  pubescence, nearly  vertical! 
low  the  antennal  inominence,  tuberculate  below;  consi<lerably  prodm 
below  the  eyes ;  a  well-marked  groove  begins  at  the  base  of  the  a 
tennje,  runs  obliquely  outward,  to  the  eye,  then  curves  downward  iit 
the  eye  into  the  cheek.  Posterior  orbits  below  broadly  dusted  with  y 
low.  Eyes  thickly  reddish  yellow  pilose.  Thorax  deep  metallic  gm  the  bat 
shining,  thickly  covered  with  yellow  or  reddish  yellow  pile,  on  t  Abdon 


there  i 
©ftenc 
concav 
bare. 

S(eiurel] 


ISEUM. 

metallic  greeii 
1  black;  tipo 
md  tip  of  liiiii 
;h  lightly  iiiru> 

to  wliich  it  i 
ter  colored,  th 
less  projectiiij, 
,  much  shorte: 


ith  moderati'l 
ides  somewlia 
veen  the  later? 
ouvex  tuberd 
not  broad.  Ai 
i-e;  arista  biiri 
I'd  longitudiii 
nit  whitish  pi! 
scntelluiu,  wit 
oiig.  Abdoiiit 
[)ile  rather  lot 
k;  tipof  feiiKii 
tibiae  sometiiii- 
the  middle  tiir^ 
iial  joints  blac 
veins  yello\vi> 
base,  except  t; 

II  Territory  at 
^ton  Territorv 
How. 


x,  :?06,  1882. 

ly  swollen,  wi 

l)ile.  Aiitom 
ista  bare,  bliu 

arly  vertical  i 
lerably  prodm 

base  of  the  a 
s  downward  iit 

dusted  witli  y 
p  metallic  gm 
low  pile,  oil  I 


SYNOPSIS    OF   NORTH    AMERICAN    SYRPIIID^i:. 


41 


pienrix?  bnshy.  Abdomen  rather  broadly  oval,  shining  black,  with 
abundant  pile  like  that  of  the  thorax.  Tegulce  light  yellow.  Legs  black, 
with  yellow  pile;  femora  at  the  tip,  base  and  tip  of  tibice,  and  basal 
joints  of  middle  tarsi,  yellow  or  luteous;  front  and  hind  tarsi  brownish 
with  more  or  less  yellowish.  Wings  subhyaline  with  an  indistiuct 
brownish  sp(»t  near  the  middle;  veins  of  the  basal  part  yellowish. 
Thirteen  specimens,  Colorado. 

Ohllosia  occidentalis.     (Flute  III,  figs,  i,  la.) 

Chvihyiia  occUhnlalis  VVilliston,  Proc.  Aw.  Phil.  Soc,  xx,  .Wo. 

Habitat. — California! 

<5 .  Length,  11""".  Eyes  thickly  pilose;  fi'ontal  triangle  black,  with 
black  pile,  somewhat  swollen  and  with  a  central  depression.  Auten- 
nse  black,  third  joint  somewhat  brownish,  nearly  orbicular,  small ; 
arista  with  scarcely  j)erceptib]e  pubescence.  Face  shining  black ;  on 
the  sides  with  rather  long,  sparse,  light-colored  i)ile  ;  slightly  concave 
fSfom  base  of  antennae  to  tip  of  tubercle,  shortly  and  deeply  concave 
b«low  the  latter ;  a  well-marked  groove  on  the  side  parallel  to  the 
eye,  running  obliquely  to  the  base  of  the  antennai.  Thorax  deep 
green  black,  with  blackish  pile  mixed  with  shorter  lutescent.  Scutel- 
Iqui  on  its  border  with  a  row  of  longer  hairs.  Abdomen  oval,  not  at 
all  slender,  shining  metallic  green  ou  the  sides  and  fourth  segment; 
the  lirst  three  segments  mostly  opaque  black ;  i)ile  reddish  yellow, 
rather  long  and  abundant  on  the  sides  of  the  segments,  nearly  bare 
in  the  middle.  Legs  black,  with  yellowish  and  black  pile ;  tibiae  red- 
dfeh  at  base  and  tip.  Wings  with  a  slight  blackish  tint,  the  veins 
black. 

One  specimen,  California. 

Chilosia  pallipes.     (Plate  III,  fig.  5.) 

CliiloHia  palHpen  Loew,  Centur.,  iv,  70. 
.'  Vhihxia  tristis  Loew,  ibid.,  71. 

Habitat. — White  Mountains,  Washington  Territory,  Oregon!,  Cali- 
fornia, District  of  Columbia  (O.  S.). 

9.  Length,  7  to  8""".  Shining  metallic  obscurely  green.  Front  moder- 
ately broad,  shining,  lightly  pollinose  on  the  sides  below,  with  a  slight 
concavity  in  the  middle  above  the  base  of  the  antennae ;  pile  yellow. 
itDtennse  ferruginous  red,  third  joint  rather  small,  rounded-ovate;  arista 
^ack,  rather  thickly  and  long  pubescent.  Face  whitish  pollinose  across 
bijlow  base  of  the  antennae ;  shining  black,  except  on  each  side  below, 
there  is  a  yellowish  spot,  sometimes  smaller,  at  other  times  large  and 
e|tending  from  the  eye  to  the  oral  margin.  In  profile  the  face  is  deeply 
odiJcave  belov;  the  antennaj,  and  the  tubercle  large  and  obtuse.  Eyes 
bare.  Humeri  light  yellow  ;  pile  of  thoracic  dorsum  very  short,  yellow. 
S^utellum  at  the  tip,  or  most  usually  nearly  wholly,  brownish  yellow, 
the  base  black  ;  pile  yellow,  and  with  six  black  bristles  on  its  border. 
Abdomen  wholly  shining,  not  very  oval;  pile  very  short,  on  the  disk  ob- 


b>  ill  ^} 


II 


l4 


i   (, 


I   i 


M 

:    I 
I 


)i 

I 

1  :^ 

1 

i'  i 

.^ 

\ 

42 


BULLETIN   31,    UNITED   STATES   NATIONAL    MUSEUM. 


Bcurc,  on  tlH»  sides  longer,  whitish.     Legs  yellow;  hind  femora,  exc 
basal  third  and  tij),  a  ring  on  the  oiiter  i)art  of  hind  tibia),  and  the  liiin 
tarsi,  brown  or  blaekish;  sometimes  the  hhwk  is  of  greater  extent  n; 
the  hiinl  legs,  and  there  may  be  brownish  rings  on  tlie  outer  part  i 
middle  femora  and  tibia\     Wings  hyaline. 

S  .  Face  wholly  shining  black,  excei>t  the  thin  whitish  pollen  belov 
the  antoniii'  and  on  the  si<les  below  the  tubercle.  I'^roiital  triiuiji'u 
small,  slightly  swollen,  lightly  fossulate,  pile  black.  Thorax  and  sen 
tellnm  wholly  sliining  black,  with  only  a  slight  bronze  or  coppery  n 
Hcction;  pile  black,  rather  long,  esi>ecially  in  front;  behind,  iiitermixci 
with  reddish  y«'llow.  Scutellum  wholly  shining  black,  pile  long,  black 
with  reddish  yellow,  the  latter  more  conspicuous  as  a  fringe  on  the  in 
der  side  of  the  margin.  Abdomen  oi)aiiue  black  ;  the  Hrst  segment,  hii  ■„■ 
spots  on  the  anterior  angles  of  the  tiiird,  the  fourtii  segment  wholly,  am 
likewise  the  hypopygium,  shining,  metallic  greenish  black  ;  pile  n: 
the  disk  black ;  on  the  sides  toward  the  front,  longer,  yellow.  Le;;. 
black,  tip  of  all  the  femora,  base  and  tip  of  the  til)ia',  and  the  extrem 
base  and  tij*  of  all  the  tarsal  joints,  yellowish  red.  Wings  distiuctl 
yellowish  or  brownish  in  front  toward  the  base. 

Five  males  and  forty  females  taken  together  (.lackson,  N.  11.,  Jul 
25-30,)  assure  me  tiiat  they  must  belong  together.  The  females  agn 
precisely  with  the  description  of  ^;<W/<7><«,  except  that  they  are  all  largci, 
while  the  males  agree  e<pially  well  with  tristis,  the  female  of  whici 
Loew  describes  ;  and  the  oidy  differences  wlii(!h  it  shows  from  theabow 
are  that  the  legs  are  black,  except  tin;  knees  and  base  of  the  tibia',  ain 
the  light-colored  humeri  are  not  mentioned.  In  some  of  my  feiiuiii 
spe(!inu^ns,  however,  the  front  and  middle  legs  are  in  large  pa,  t  black 
ish,  and  in  one  they  are  almost  wholly  black.  Twomah'.  specimens  Irdi' 
Washington  Territory  and  Oregon  1  refer  to  this,  although  the  i)ile  n 
the  dorsum  of  the  thorax  is  wholly  black,  and  the  legs  are  less  black 
the  front  and  middle  tibise  having  only  a  black  ring,  and  the  first  twi 
joints  of  the  tarsi  yellowish.    They  are  also  distinctly  larger. 

Chilosia  cyaneacens.     (Plate  III,  figs.  3,4.) 

Chiloxia  cyanesccHH  Loow,  Ceutur.,  iv,  ()7  (male). 
i  ChiloHta plumata  Loi'w,  ibid.,  (i8  (fcmalu). 

Habitat. — Connecticut,  New  Hampshire!,  Illinois  (Loew). 

<J  .  Length,  .5  to  6'"'" ;  of  wings,  (J  to  7""".  Blackish  blue,  shining;  pil' 
of  the  front  and  thorax  black,  of  the  abdomen  light  colored.  Anteiin.e 
small,  yellowish  red,  third  joint  ovate ;  arista  black,  plumose.  Fact 
wholly  black ;  except  on  the  moderately  projecting  tubercle,  lightly  pn. 
liuose.  Eyes  bare.  Frontal  triangle  small.  Margin  of  the  scutellim 
with  black  bristles ;  on  the  under  side  with  whitish  i)ile.  Abdonici 
wholly  shining.  Femora  black,  at  the  tip  reddish  yellow  ;  anterior  ami 
middle  tibiie  reddish  yellow,  with  a  black  ring;  hind  tibia-  black,  tin 
base  somewhat  broadly,  the  tip  narrowly,  reddish  yellow  ;  the  first  twr 
pairs  of  tarsi  yellow,  their  last  joint  black,  hind  tarsi  black,  the  thin; 


eMs,  n 
tbe  out 

This 
throng 
the  im| 
broad, 
can  hai 
yet,  un 
wise  sp 
species 
males, 
is  as  t( 

9.  IJ 
scutelli 
fosaulat 
joiot  la  I 

the  )ii()( 
front,  1 
scutellu 
middle 
and  tll)i 
of  both 
tarsi  fii 
Wings 
lately  h 
This  ( 

erate  in 
Chilosia 

CblloBia 

Chi 

ffahif 
S.  L 
lowish  ] 
cent  on 
with  a 
forward 
bdow  t 
with  lo 
clothed 
itftbord 
shilling 
anterioi 


SKUM. 


SYNOPSIS    OF    NORTH    AMEIflCAX    SYRPHIDiE. 


43 


toinorn,  exct'ii 
;,  und  the  liiiii 
utcr  extent  (i; 
I  outer  part  i 

1  i)<)lleu  lu'ldii 
roiital  triaiiuK 
orax  and  sen 
:)r  (iopper.N  it 
nd,  intermix^ 
le  long,  black 
ige  on  tilt'  III 
.segment,  lai-. 
nt  wholly,  am; 
ilack  ;  pile  ■ 
yellow.  Lc; 
<l  the  extrciii 
ings  (listiiicil 

n,  N.  11.,  ,liii 
I'einaleH  a^jH' 
\-  are  all  lar;;ii 
male  of  wlnCi 
from  the  allow 
the  tibia^,  ain 
of  my  feiiiiii. 
ge  pa.  t  black 
peeimens  irov 
igh  the  pile  n: 
iro  less  bhick 
I  the  first  twi 


,  shining;  pil' 
3d.  Anteiiii.t 
umose.  Fan 
le,  lightly  im', 
the  stnitelliiiii 
e.  Abdoiiiei, 
;  anterior  ami 
)ia'  black,  tli' 
;  the  first  twi 
ick.  the  third 


and  fourth  Joints  yellowish.  Tcguhe  white;  halteres  yellowish,  their 
hMtds  above  blaek.  Wings  rather  long,  dilutely  yellowish  or  subfus- 
«aa8,  more  yellowish  toward  the  base,  veins  at  the  base  yellowish,  on 
the  outer  part  darker;  stigma  but  little  darker. 

This  deseriptiou  is  that  of  Loew  for  (',  riiducsctiiN,  which  apiiliesidosely 
tbroiighout  to  s])eciniens  from  Coriuecticut  and  New  nani]>shire.  with 
the  imptutaiit  ditlereiice  that  there  is,  in  mine  at  least,  a  moderately 
broad,  o]>a<pie,  lilack  cidssband  on  the  secoml  abdominal  segment.  I 
can  hardly  think  that  Loew  would  have  overlooked  this  chara<'t«'r,  but 
yet,  until  specimens  are  obtained  without  this  band,  and  ditt'ering  other- 
wise spe(!itically.  I  prefer  to  consider  my  specimens  as  belonging  to  this 
species.  With  m.v  White  Mountain  specimens  i  obtained  several  fe- 
males, which  «'vidently  belong  to  the  sanu».  species.  Their  «lescrii)tion 
is  as  follows : 

9.  Blackish  liliie,  shining;  pile  everywhere  short,  on  the  thorax  and 
scutelliim  black,  on  the  abdomen  white.  Front  narrow,  jdane,  gently 
fossulate  above  th«'  base  of  the  antenna'.  Antenna'  reddish  yellow,  tliinl 
joint  large,  oval;  arista  black,  i)lumose.  Face  black,  lightly  poUiiiose, 
the  moderately  projecting  tubercle,  together  with  the  oral  margin  in 
front,  luteous.  Sides  of  the  thoracic  dorsum  and  the  margin  of  the 
scutellnm,  with  black  bristles.  Abdomen  wholly  shining.  Front  and 
middle  legs  luteoiis,  last  Joint  of  all  the  tarsi  black,  the  middle  femora 
and  tiliiic  subfiiscous  near  the  middle;  hind  legs  black,  the  base  and  tiji 
of  both  femora  and  tibia;  luteous,  the  third  and  fourth  Joints  of  the  hind 
tarei  fiiscous-luteous.  Teguhe  white;  halteres  wholly  light  yellow. 
Wftigs  yellowish,  tlu^  veins  fuscous  toward  the  outer  ])art,  stigma  di- 
lutely lutescent. 

This  description,  it  will  be  seen,  is  almost  precisely  like  that  of  (J.  i)hi- 
mata,  as  given  by  Loew,  except  that  he  describes  the  auteunte  as  mod- 
erate in  size,  whereas  in  my  specimens  they  are  unusually  large  foi  a 
CkihNia. 

Cllilosia  capillata. 

( hilotsia  vapilUiiu  Loew,  Coutiir.,  iv.  Go. 

CartoatjrphHa  lamprurua  Bigot,  Anuales  Soc.  Ent.  Fr.,  1884,  552. 

ffahifat. — District  of  Columbia  (Lw.),  Virginia! 

S  .  Length,  7""".  Shining  metallic  green.  p]yes  bare.  Antennas  yel- 
lowisli  re«l,  first  Joint  and  outer  end  of  third  black;  arista  bare  (pubes- 
cent only  under  a  strong  lens),  black.  Face  .shining  black,  in  profile 
with  a  long  concavity,  the  tubercle  nose-like,  projecting  considerably 
forwards;  on  the  sides  above  pollinose,  extending  across  as  a  band 
below  the  aiitennie.  Frontal  triangle  a  little;  swollen,  gently  ])itted, 
wttlh  long  yellowish  jiile.  Dorsum  of  thorax,  pleune,  and  scutellum 
dOthed  with  rather  long  yellowish  pile.  Scutellum  without  bristles  on 
it»  border,  transversely  grooved  before  the  margin  above.  Abdomen 
shining  metallic  green,  the  .second  and  third  segments,  except  the  broad 
anterior  angles,  opaqtu',  or  subopaque,  black ;  pile  light  yellowish,  or 


44 


lULLKTIN    :;i,    UNITED    STATi:S    NATIONAL    Ml'SKUM. 


|i     :i  ,11 


lii    \  :ii 


whitish  ill  front.     L«';,'.s  yrlhiwish  rcil;  nil  the  fniioni,  except  the  i 
aixl  tlie  liist  two  jointM  of  nil  the  tiirsi,  black  :  hind  nietatarHi,  nnd  t 
liiiid  tibiif  ill  the  middle,  Aiscouh.     Tefifuh«  .yeUowisii   white;  haltti 
reddish  yellow.     VViiijirs  eiiien'Oiis  hyaline;  veins  reddish  yellow, 
the  onter  part  and  behind  black  ;  stijiiiia  yellow. 
Six  speeiinens,  Virginia  (Mr.  Tlieo.  Perj-ande). 

Chilosia  comosa. 

Chilima  <o)iif>sa  I^iicn-,  (liMifiiv.,  iv,  •!<'. 

Ildbitat.—iUAonulol,  Eii<jlisli  River,  Wiiinepejj  (Lw.). 

i  .  Leiif^tth,  0""".  Shiniiifj;  inetullic  ;ireen,  with  rather  lonj?  yellowi 
)iile.  Frontal  trianj{le  lar^e,  with  Ijlackish  pile.  Face  shining  :»l;ii 
liylitly  polliiiose  on  the  si<les  and  above.  Antenna;  ratlier  small,  fi 
joiiif  black,  second  and  third  joints  ol)scnrely  red;  arista  black,  l»;i 
Kyes  bar<\  Heutellnm  witlnMit  black  bristles.  Abdomen  wholly  s|i 
iufs,  but  less  so  on  the  anterior  sejrments.  Legs  black  ;  tip  of  feino 
base  ami  tip  of  tibiie,  yellowish  re<l.  Winys  cinereous  hyaline,  sti;:: 
and  veins  yj'llowish,  the  latter  on  the  onter  part  and  the  costa  dark. 

5 .  The  jiile  shorter,  the  third  antennal  Joint  laif-cr  and  lightcii 
ored,  the  tibije  in  larger  part,  and  tin'  tarsi  m  jiart,  yellowish  red. 

Two  males  and  one  female  from  Colorado. 

Chilosia  iiigtipeiinis.     r  Piute  II,  ll<;.  M.) 

<'liviluiiia  niurijiciiniH  Williwton,  Pnx'.  Am.  Phil.  Soc,  xx,  H07. 
('ariuKijriihuH  iufnmaiuH  Bipit,  Aiiiialcs  Soc.  Eiit.  Franco,  l'^.'^4,  ooS. 

Habitat. — Mount  Hood,  Oregon!. 

(J.  Length,  (» to7  """.  Deep  black.  Eyes  bare.  Frontal  triangle  ;i; 
face  shining  black,  the  former  a  little  fossulate,  the  latter  very  sligli: 
excavated  below  the  antenna;,  below  the  tubercle  shortly  and  dec] 
eoiicave;  sparsely  blackish  pilose.  Antenna;  small,  basal  joints  bliii 
third  joint  reddish  brown  or  brown,  rounded  ;  arista  bare.  Tlioi 
black,  nearly  oi)aque,  with  short  black  jiile  above,  longer  on  the  scut' 
lum  and  pleurai ;  scutelluiu  shining,  without  bristles.  Abdomen  slio: 
broadly  oval,  dei)ressed  ;  ojiaque  velvety  black,  with  a  bluish  cast ;  y. 
on  the  sides  of  the  anterior  segments  reddish  yellow;  anterior  angle- 
the  third  and  fourth  segments  shining  metallic;  hyi)opygium  shiiiii. 
Teguhe  with  a  blackish  liorder,  and  a  friuge  of  black  jtile.  Legs  who! 
black.     Wings  blackish  in  front,  clearer  behind ;  veins  black. 

Three  specimens  from  Mount  Hood,  (.)regon. 

Chilosia  versipellis,  n.  sp. 
Habitat. — Washington  Territory  !. 

S  .  Length,  oA  "'"'.  Antennje  small,  first  two  joints  black,  third  sii 
quadrate,  reddish  yellow  ;  arista  bare.  Frontal  triangle  much  swollt: 
fossulate,  i)ile  black.  Face  shining  black,  with  sluut,  spaise  pile,  gent 
concave  below  the  antenuie,  in  the  middle  foiiiiiiig  a  veiy  obtuse  an;; 
lar  tubercle,  thence  gently  concave.  Eyes  baie.  Tliorax  black,  near 
opaque,  witii  black  pile  of  moderate  length.  Teguhv  light  yellow,  wi: 
a  friuge  of  light  yellow  pile;  halteres  yellow.    Abdomen  deep  volve: 


CUIosi 


llab 
9. 
Eyes  I 
beloNN 
protiib 
broad 
the  en 
and  th 
mora  a 
tibia', 
blmtk. 

Four 

CUlosir 
Bahi 
i.  : 
sniall, 
roundel 
gently 
Thor;i\ 
with  111 
pile.     I 
black  i  si 
stigma 
two  : 
inal  sc}i 
pile  of 
in  front 

Cbllosia 

EabU 
9.  L 
pubes(;» 
margin 
oag,  fei 
short  a 
blaekisl 
Front  1 
arista  1 


O 


USKI'M. 


SYNOPSIS  or  xoin'ii  amkrk'ax  svi.'pinn.r. 


45 


except  the  i    bbck ;  tlif  siiiall  aiitciior  aii;j;lc.s  of  tin-  thinl  ,s(';;in»iit,  ami  thi'  fourth 
tatarwl,  and  f    MgiiH-iit,  cxci'i't  a  mt'diaii  strips  <lilat.'(l  in  front  and  not  ivacliinfj  tho 
white;  halUn   hll»<l  l»onler,  sliininj:'  black.     Leys  wholly  hiark.     \V'in«.s  with  a  yellow- 
(liHh  yellow,     ith  tinjie;  veiuM  yellowi.sli,  hiaekish  on  the  outer  part. 
One  Mpeciincn. 
CWloBla  parva       I'lnli'  11,  li^,^  lit.) 

cliiilosiii  iMim  W'illistdii,  Trtx'.  Am.  I'liil.  Soc,  xx,  'M7,  1882. 
M,}(i»o,i(tHt,r  lulnipvH  liinot,  Aiiiiiilt's  .">*cic.  lint.  Vr.,  l^SI.  TJit^t. 

JIdhlldt. — Oit'^ion!. 

5.  licn^^fli,  ■'»'"'.  Shilling-  metallic  ;ireen,  with  a  hiassy  rctlection. 
By«'s  It. Ml',  l-'ioiit  with  short  IdackiMli  |>ih^  Tacc  slijjihtly  excavated 
below  the  antJ-'Mia-,  the  tubercle  lar;ie,  obtuse,  the  epistoiiia  nmcli  less 
protuberant.  Thorax  with  short,  spaise,  lutes(!ent  pile.  Abdomen 
broadly  oval;  wholly  sliininy-,  nearly  bare,  whitish  pubescent  toward 
the  end.  liC^s  reddisli  yellow;  the  tibia3  with  a  small  brownish  rinjjf, 
and  the  terminal  Joints  of  the  tarsi  brown;  sometimes  flie  anterior  fe- 
mora at  the  base,  the  hind  femora  in  larj^e  ])art,  and  larger  liiij^s  of  tho 
tibia*,  brown  or  blackish.  VViugH  brownish;  stigma  luteous;  veins 
black,  yellowish  at  base. 

Four  specimens. 

CUlosia  lugubrii^M  II.  H|> 

Mithitot. — California!. 

i.  Length,  '"^  to  10""".    Deep  black,  moderately  shining;.    AnteniuB 

small,  black,  the  third  joint  reddisli   brown,  nearly  rcctanjiular  above, 

,     .        ,       roun<h'd  below;  arista  bla(;k,  iilumose.     I'aee  shininif,  liyhtlv  iiollinose, 
ntaltriauKleiH        ^,  ,      i^       ^  i   *  •       i     i  i       ,       i 

,.  ,    jrentlv  concave  on  upper  iiart.     Irontal   trianyle  laru'e,  black  pilose. 
ter  very  sliiili;  "       ■  i  ■       •  c-.  r-.  , 

,    ,       Thorax  with  considerable  black  i)ile;  on  the  maij;iii  of  the  scutcllum 


r  lon{;  yeUowi 
e  shining  ;)l:u 
iither  small,  ti' 
ista  black,  li;i 
nen  wholly  sb 
;  tip  of  feiiiii' 
I  hyaline,  sti;;i 
ihe  costa  darkt 
r  and  lightcii 
llowish  red. 


H4,  553. 


irtly  and  dec] 
isal  joints  bliit 
a  bare.  TIkm 
ier  on  the  scut 
Abdomen  slio: 
bluish  cast ;  |'; . 


with  line  bristly  hairs.  Abdomen  wholly  shilling,  with  I  i.i.;  lit  colored 
pile.  Legs  black,  the  knees  very  narrowly  yellowish.  Wings  with  a 
blackish  lint;  before  the  humeral  cross-vein  quite  dark,  veins  black, 
Stifftna  vellowish. 


interior  angle; 
>ygium  shiiiii; 


Two  specimens.  The  posterior  part  of  the  second  and  third  abdom- 
inal segments  are  less  metallic  or  sub-opa(pie.  The  eyes  are  bare.  The 
pile  of  th(!  thorax,  when  seen  from  behind,  seems  mostly  black,  from 


-^^  ,  ,  in  front,  hiteoua. 

.    Legs  who! 

black.  Chilosia  leucoparea. 

Chiloxia  leucoparea  Loow,  Centur.,  iv,  69. 

Habitat. — Carolina  (Lw.). 

9  .  Length,  0.5""".  Black;  eyes  bare,  antenna}  red,  arista  very  briefly 
pubescent;  face  below  on  each  side  light  colored ;  humeri  light  colored; 
jlack,  third  siKjQjiygj,,  „f  ^j,g  scntellum  testaceous,  provided  with  bri.stles ;  legs  hite- 
emuch  swolltong^  femora,  except  the  tip,  black.  Black,  moderately  shining;  pile 
•avse  pile,  gent  gj^oj^  and  not  abundant,  on  the  di.sk  of  the  abdomen  and  at  the  tii> 
'•>  '*^*t"'^<^  ""f^blaeki.sh,  elsewhere  whiti.sh ;  pile  of  the  vertex  a  little  longer,  black, 
ax  black,  ncarpypy^  narrow,  plane.  Antenme  wholly  red,  third  joint  rounded  oval; 
ght  yellow,  wiarigta  black.  Face  black,  shining,  above  strongly  excavated,  below 
en  deep  volve' 


SI 


r<i  i: 


'   u  A 


I    , 


46      BULLETIN  :?1,  UNITED  STATES  NATIONAL  MUSEUM. 

p.illid  on  oacli  side;  tubercle  ratlier  larji'e,  obtuse.  Dorsum  of  tlmr  litolanoi 
and  scutelhiin  ronjiiiened;  iibdoiuen  very  lifihtly  puiictulsite,  sliinii  ' '' 

Legs  Uitesccnt ;  femora,  except  the  tip,  bla<;k ;  hind  tibi;e  and  metatii:  Sdhi 
subfnscous,  hites(('iit  !»t  base  and  tij).  llalt(M'es  whitisli;  tefjuhu  wlii  5.  K 
Winjis  snbliyaline,  lij-iilly  cinereous  sublutesccnt,  base  clearer,  stii;i.  cte  inid 
more  saturate  lutescent. — Translation.  Front  a 

depress 
ADDITIONAI.  NOKTII  AMElilCAX  SPECIES.  gpof  „,. 

Chilosia  liontosa  Iiit;oi,  Ann.  Soc.  ICnt.  dc  Fi-,.    IS- I,  'iW,\  {('arlosiirjihus). — Mexi.  tBDUll'  I 

Thorax 

MELANOSTOMA.  «®°^'' ^^ 

equal  w 

Mddnostoma  Scliincr,  \\'i:ii.  IjiIhih,  M<in;itN('lir.,  iv,  'Jit!,  l-(io.  seCOnd 

Medium  si/e,  exceptionally  larj^e,  species,  thinly  pilose  or  iicii;  whole  It 
bare,  metalli(!  black  or  black  grc'ii :  the  abdomen  with  lifihter-colni  ing,  els 
sjjots  oi-  bands,  usually  slender.  Head  liemispliei'ical.  Anteinia'slid:  thirtl  sc 
third  Joint  oval  or  a  Utile  elongate;  arista  basal,  ban'.  Face  distiin  fourth  s 
tuberculale,  nearly  bare,  always  bhu'k  or  black-green,  never  in  gidir concave 
color  yellow,  though  tVcciucutly  with  whitish  dust.  ICyes  bare.  c(»iif  ing  scgi 
nous  ill  the  male.  Thorax  shining,  never  with  yi'llowor  reddish  in;i;  the  hiiK 
ings.  Abdomen  elongate,  slender,  rarely  much  oval,  considerably  i;  the  base 
tcncd.  Legs  simple,  the  hind  metatarsi  s(Uiietiines  a  little  thicken  but  li'tN 
Wings  rather  large,  extending  beyond  the  abdomen;  marginal  cell  ojh  loWish. 
third  vein  maiiy  straight;  outer  anterior  angle  of  lirst  jMsterior  i  Four  .«■ 
acute.  Until 

TAHLt;  OF  SPECIES.  doubtiul 

i.— Li'jis  r.'d,  not  very  slender,  (lie  liiiul  luctiitiirs;  a  little  lliickcned ;  tliinl  aliddin  banded  ; 
S(';;iiient  sciiicel\  al  all  iinirowed  beiihul ;  second,  Iliiid,  and  foiu'tli  si'fjiui  Js  A  Plat; 
witli  metallic  cidss-Iiand.s,  tlie  hi.st  not  infeiTupted ;  \vinj;.s  only  a  little  Idi.out  ill  ev 

than  tile  alidonien ^"^'Fdarker    il 

Legs  more  or  less  l)laek  ;  or.  it  witlioni  l)lack,  slender,  and  tlie  liind  nielatai>;  ,i___        i 

.,,,,.,,  '  deep  red 

at  all  thickened *^ 

2. — Legs  ([uite  slender,  the  niet.itarsi  of  the  male  not  thickened,  alxhunen  in  the  ii  j]Uaj|mQg|.| 

witli  tliree  ]iairs  of  reddish-yellow  s]iots y../^ 

Hind  metatai'si  of  the  male  always  somewhat  thickened;  l).ind.s  of  ahdonun        rr  i -, 

tallic  or  jrreenish,  not  reddish-y(  How 

3.— Eiice  with  a  iirominent  tnherele;  ahdomen  of  male  narrow,  elouLjate,  liroaih-       O  *    ''*'' 

ti))  of  I'onrth  segmenr,  sjjots  elongate angiistatuWlth  wlii 

Tnliercle  oft'ace  not  ,it  all  |M.tminent,  indistinct ;  lilxlomen  not  elongate,  not  'u'  terVHis  ol 
out  a*  tip  of  fonrlli  s<'gment,  spots  (piadrate:  in  female  oval  with  t'oin- 1' -)yQ|.  1]^, 

of  triangnlar  spots '"^""''project ill 

4,— Ihe  ipollen  of  the  i\\rr  leaves  small  circular  continent  spots,  ripple-like,  et'„  ,  . 

ground  ccdor;  second  alidoininal  segme.it  (.  otinctlv  broader  liehind.         '"  '" 

tisiini'^^rtlical  t 

The  pollen  of  the  face  I,;  nn,       m,  or  if  soniewhfit  ]ii)plo-like.  not  composed  m  ^re©!!,  eh 

'■'i'"!'*!'""'^ ;eresbr(n 

5.   -I'ollen   ^r  faci' sone  whai  striate  on  the  sides;  ]>ile  of  thorax  dusky    ,     obacunyjn  ^j^  .i 

Pollen  of  face  nnif'inn  ;   pile  of  iliorax  whitish •. 

6. — .\li(!omen  ■^Icndei- ccerulesce:' 

Alidomen  oval  (.*>'///■/'/'».'<  m'/k/u'i.i). 

For  additional  species,  see  descriptions. 


USEUM. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIID.E. 


47 


trsum  of  tliDi  Melanostom.u?)  riifipeB. 

■tlll'ltO    shiliii  '/I'l/ox/.f  niJi/Hx  Willistdii,  riH)C.  Am.  Pliil.  Soc,  xx.  30(5.  ISS^. 

e  and  inetata'      Huhitut. — \\iisliinf>t(Hi  T»>rritory! 

•  to'^uliu  Avlii       *•  I^*'",utIi,.S  to  !>""".    I'^iU'c  .sliiniufj;  black,  except  the  prominent  tul>er- 
clearer  sti"i  cle  and  the  cliccks,  i)artiaUy  concealed  beneath  even,  whitisn  pollen. 
Front  a  little  narrowed  above;  lielow  the  nnddle  a  shallow,  transverse 
depression,  on  each  side  of  wiiicli  tiiere  is  a  triangular  whitish  i)ollino.se 
spot  neai'  tlir  eye.  contiinions  alon;;'  the  eye  nai'rowly  to  the  face.     An- 
(«//»V)/(»s).— Mcx  tenna'  blackish,  third  joiid  a  liltle  elonji'ate,  reddisii  on  tiie  nndei-  sid«'. 
Thorax  metallic  };reen- black,  finely  pnnctnlate,  nearly  bare,  the  pubes- 
cence wiiiti.-h.     Abdomen  elonji'ate  oval,  the  third  se^'iiient  of  neaily 
equal  width  llir()ui;iioiit,  not  narrowed  behind:  first  sej^ment   shininj.'; 
'"■  8econd  st'^iiiicnt  on  the  sides  with  a  larjic  trianjiidar  spot,  extending'  th<' 

)iloso  or  Ilea;  whole  len;;th  of  the  sejiinent  on  the  sides.  lij;iit  jireen,  moderately  siiin- 
I  li'ditercolm  ing,  elscwlicre  sMb-oi)a(iue  black,  witii  a  slimht  greenish  letlection; 
Antenna' sliii  third  segmeid  similar,  but  the  s]iots  more  nairowly  separated;  on  tlu^ 
Face  (list i lie  fourth  segment  tiu^  spots  are  ('onflnent,  forming  an  entire  (aoss-ltand, 
never  in  oidii  concave  behind,  the  remainder  of  tlic  segment  sliining  l)hutk  ;  rvmain- 
v'cs  bare,  coining  segments  wiiolly  sinning  greeiiisli.  Legs  dark  red,  rather  stout; 
i>r  reddish  itiai  the  hind  feim  ra,  or  all  the  femora,  more  or  less  bi'own  oi'  blackisii  at 
onsiderably  ll  the  base;  hi'i  1  metataisi  a  little  thickened.  ^Vings  sliort,  projecting 
little  tiiickeii  t)Ut  ii'Hc  beyond  tij*  of  abdomen,  nearly  hyaline;  stigma  dilutely  yel- 
irginalcelloiJoWish. 
•St  posteriori      Four  s]tecim<  a. .  ^^V'.isliington  Terrilory, 

Until  the  male  of  this  species  is  known,  its  position  is  somewhat 
doabtfiil.     Its  relationship  to  Chilosia  is  very  strong,  but  the  distinctly- 
(t-  tlih-d  ainltiiii  l>anded  abdomen  wouhl  seem  to  remove  it  from  that  genus;   possibly  ir 
Mid  i'oiutli  sifiim  isaPlatychirus.    With  these  four  specimens  is  a  fifth,  agreeing  through- 
only  n  tittlo  lin.out  in  every  i'es]iect  with  tiu'  others,  excei)t  that  the  femora  are  a  little 
.     .     .     r\ifiF:,la,l.|j^.,.^  .,,!,{  jin.  uhdoineii,  except  t!ie   first    segment,    is  of  a  unilortn 
iiiK  mci.i  ''i^  (]gQp  ,.,,,!_     'I'ln,  (.,,1,),.  seems  not  to  be  due  to  immaturity. 

Kldin.'ii  ill  tli.iiMetanostoma  tigiinum.     (,1'1;U.'  fll,  (i,u-.  .-:.) 

.V.7<n(i>x/ii»/((  ////('Mid  Ostt'ii  S;ii'l<cii.  Wist .  J  )ii)t,,  ;!■.':!. 

I  so   .1 1(  oiiitii      ff0i,jtt,t^ — Washington  Territory,  Califiu-nia,  Colorado,  Arizona! 

niriitc  i.idiidr-      <^*   ''Ciigtli,  (5  tol>""".     Face  and  front  dark  metallic  green,  the  formev 

aiigiistatwith  wliite  pollen,  form'ng  traiisvei-se,  irregular  dotted  ripple-;,  the  iii- 

loiinati ,  iioi  Intervals  of  wiiicli  show  the  ground  coloi' :  llie  eluH'ks  and  a  stripe  running 

viil  wilhroiur^ver  tlie  facial   tubercle  are.  bare  of  pollen:   facial   tubercle  obtusely 

.    .    niellimpj^j^j,^jii„,_     Anteume  black,  tlnrd   joint   and  arista  brown,  or  reddish. 

•'lu'l'iiiul*    '    ^^^^  faintly  and  evenly  grayish  jiollinose  and  with  erect  black  jtilo; 

tigiinr'^crttcal  triangle  metallic  green,  with  bhu-k  jiile.    Thorax  metallie.  bluish 

oi  (•oini)os((i  iM^reeii,  clothed  witii  dull  grayish  pile,  more  whitish  on  the  pleura'..    Jlal- 

■     .     .     •     ;eres  brownish.    Abdomen  elongateelliptical,  broadest  at  the  hind  mar- 

■,k.v    .    obscurijjjj  ^|-  jii,,  second  segment;  first  segment  greenish  black;  the;  second 

■^,^j.^jgj.(!.'elvet- black  opaque,  the  lateral  ad'^vii  metallic  olive  green  with  a  small 


48 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


.1  'i-l 


i    >    > 


subtriaiisular  I'xpaiisioii;  third  sej^jinc'iit  iuitoviorly  with  an  iiitenn]i; 
iiR'taUic!  j^rei'iiish  cross-band,  nearly  half  as  broad  as  the  se{.vnK'nt. ' 
expanded  on  the  sides  along  the  whole  lateral  inarj,Mn;  the  po.stci 
ludf  ot'the  sej?inent  is  of  a  velvet-blaek,  which  does  not  quite  reacli  • 
lateral  marjjin;  the  fourth  segment  is  like  the  tliird  except  that  the  dl 
green  cross-ba?id  is  not  interrupted,  or  only  sal)  interrupted,  and  i 
nected  l)y  a  longitudinal  stripe  of  the  same  color,  cutting  throngli ; 
velvet-black  portion,  with  the  nfirrow  hind  margin  of  the  segment;  ti 
the  velvet-black  on  this  segment  forms  a  broad,  interrupted  cross-lin 
luirrowly  reaching  the  lateral  margin;  illth  segment  and  l!ypo))yi;T 
metallic  green.     Femora  metallic;  green;  knees  yellowish  brown  ;  ti 
yellowish  brown  or  brownish  yellow  at  the  base,  darker  toward  the 
especially  of  the  last  ])air;   tarsi  black,  first  Joii-t  of  the  mi<ldle  i     ff''^*^'" 
lu'own ;  first  Joint  of  the  hind  tarsi  incrassate.     Wings  subhyali 
stigma  bi'ownish  yellow. 

Six  specimens  from  the  Pacific  regions,  four  from  Coiorado,  and  tli 
from  Arizona,  1  have  examined,  and  it  is  a  little  singu  xV  that  only  ina 
are  vi't  known. 


Mela] 
Ho 

$■ 
tabei 
Hie  c< 
long  1 
cave 
more 
bine, ; 
first  ; 
gradu 


Melanostoina  obscurum. 


broad 
to  the 
each  s 
the  mi 
or  two 
border 
filth  sc 


/Si/rphiis  ohn<.iiriiH  8ay,  Aiiicr.  Em.,  i.  j*l.  xi;    Coiupl.    Wr.  i,  23;  Wiedcnia   or  bl  u 


Aiiss.  Z\v.  his.  ii.  llil  (traiisliition  iVmii  S.-iy). 
MehoiosloiiKi  iihucurit  CMi'U  yackt'ii,  Cat.  Dijit.,  V,ll. 

JIahitat.—AihxutU'.  States ! 

S  ,  $  .  Length,  0  to 8""".  Head  metallic  greenish  black,  shining;  i; 
cxcei)t  the  tubercles  and  cheeks,  thinly  covered  with  grayish  iiollcii 
the  sides  forming  indistinct  ri])i»]es,  through  whi<  Ii  the  ground  r^ 
shows  more  ])lainly  ;  tubercle  not  pioinineiit,  not  jutting  so  far  forwii 
as  the  e[)istoma.  Antennae  black,  tliiid  Joint  brown,  moic  or  less: 
«lish  below,  or  even  wholly  reddish.  Frontal  and  vertical  triangles  n 
shining,  with  black  pil".  Thorax  shining  greenish  black,  pile  blici 
on  dorsum,  on  the  scutellum  intermixed  with  yellowish,  on  the  ]ilf 
Avholly  yi'llowish.  Ab<lomen  velvety  bhu^k,  narrow  ly  oval,  the  st'i 
segment  a  little  broader  behind ;  tirst  segment  metallic,  shining ;  s»m 
segment  on  th*'  sides  with  a  semi-oval  bronze  s])ot,  extending  on 
lateral  tnargins  the  whole  length  of  the  segment ;  third  and  tburtb 
ments  each  with  a  large  metallic,  somewhat  coi>])ery,  triangular  sjki; 
each  side  of  the  base ;  third  segment  with  a  small  triangular  spot  in 
niiddle  belli n<l,  sometimes  extending  slemlerly  forward  ;  fourth  sesiii 
Avith  a  median  litrijie  <lilated  on  the  hind  margin  ;  remaining  segim 
shining.  Hind  legs  blackish,  the  tibin)  and  tip  of  femora  yellowi> 
brownish ;  front  and  middle  legs  yellowish  led,  femora  at  base,  amiPendicii 
of  tarsi,  black;  hind  metatarsi  in  :lie  unile  slightly  thickened.  ^V: Frontal 
nearly  hyaline.  the  feiii; 

Six  specimens:  ^Mount  Washington  (William  Patton,  G.  DiuuiK'*'lialIow 
Corrnecticut,  and  Pennsylvania  (Keen).  whitish 

©laewhe 


the  til) 
behind 
ishyell 

Melaao; 

J/ 

<S'r( 

Sn 

I 

/Si;  I 

■     (Si/) 

M( 
Me 
?.)/ 

Sal)H 
9, 


] 


I     i  I      t 


USEUM. 

1  nil  iiittTiup; 
lie  sejifiiu'iit. ' 
n ;  the  iiostii 
,  (luite  reach  • 
pt  that  the  ol 
lupted,  and  (> 
iiio'  thronjiii; 
le  s('i;iiiciit ;  ti 
ptod  cross-hii! 
iiid  h.vpo]).vui 
ish  brown  ;  ti' 
r  toward  the  ■ 
the  luiddU'  i; 
iiijis  subhyali! 

I'lorado,  and  tlr 
."  that  only  uiii 


SYXOPi^LS    OF    NOK«riI    AMERICAN    SYRPHID^E. 


49 


Melanostoma  ccen.lescenB,  u.  sji. 
//rt/>//r/^— (;oh)ra(h> ! 

$  .  Leiijrtl),  S  to  '.»""".  Face  deep  Khiiiiiifi-  greenish  blue;  exc^t  the 
tobeicle  and  checks,  evcidy  covered  willi  grayish  pollen.  Face  in  pro- 
file consi(U'rably  projectniji-,  the  tubercle  lar^e  ;  frontal  trianyle  w  :tli 
lonji  blackisli  pile,  vertical  triaiifile  with  liyiiteolored  i)ile  ;  (cheeks  con- 
cave Irom  before  backwards  below.  Antenna-  bia(;k,  third  Joint  brown, 
more  or  less  yellowish  below.  Thorax  bri,iilit  sliinin^;  metallic  ^^reenisU 
Wne,  pile  {jrayish  wliite.  Abdomen  latliei  slender  an<l  el()ii}i;ate.  tlje 
first  and  second  se^iiiii'iits  of  nearly  ecpial  width  thronj^lionr,  thence 
gradually  mirroued  to  the  end  ol  the  fourth  sequent:  liisr  seii'tnent 
greenish  black  ;  secon<l  sefiinent  subojiaipie  bhu-k.  on  tli«'  sides  in  front 
broadly  sliininji'  ^^reenish  blue,  which  color  extends  back  vei'v  narrowly 
to  the  hind  marj;in  of  the  scfiinent ;  near  the  middle  of  th*- .•^e<>iiient  on 
■each  side  there  is  a  small  yellowish  or  whitish  spot  ;  third  segment  in 
the  middle  and  lu'hind  oi>a(ine  black,  on  the  sides,  on  the  anterior  half 
•or  two-thii'ds,  a  lar<i'e  yellowish  or  whitish  spot,  separated  from  the  front 
border  l)y  a  shininj;'  space  ;  foni'th  se^ineiit  similar,  its  hind  Itorder,  the 
flitb  sejiiiicnt.  and  hypopygium,  metallic  shining' gieen.  Legs  brownish 
orbl  cicisli,  outer  half  of  front  and  mi<ldle  femora  and  the  base  of  all 
tItB  tibia'  reddish  yellow  ;  hind  femora  with  a  row  of  black  bristly  hairs 
behind;  hind  metatarsi  thickened.  NVings  subhyaline;  stigma  brown- 
ish yellow. 

Jtfelaiiostoma  mellinuin.     (Phuc  HI,  fij^.  D.) 

Miincu  iiitUiiiti  lAimr.  Fiiiiiiii  Siuh;.,  Ir^'Jl  ;  !S(()))()li,  Jilijtoiii.  Car.,  S)!<4:  Scliiiuik, 

Ins.  Aiistr.,  IIIO. 
ficacvii  mtlliiia  Faln'ichis,  .Syst.  AiiH.,  vi.'il,  V2  ;  I'^illi'ii,  Syi'L)Ii.,46,  :J0;  Zetlt'i'sledt, 

Dilil.  .Scand.,  ii.  To'J,  and  viii,  lib"):!,  tW, 
jSi/rpliii'i  //it/Z/yKft  Fal)ricius,S|n'c.  Ins.,  ii, '!:>:!,  (it ;  Eiitoni.  S.vst.iv,  ;!0M,  llu  ;  (?) 

Meigen  ISysl.  Bt-.scbr.,  iii,  Ijiil,  tr.");  .ScliiiitT,  Dipt.  Anstr.  Vcrli.  Z.  B.  Gcs.,  vii.afj."). 
Scaeva  walafinYahrichiH,  Aut\. y'^'i'-i,  14;  ZetterHtedt,  Dipt.  Scand.,  ii,  760,  and  viii, 

:U.-)4,()a. 
Siirjihu^  Hculid-in  J'an/.er,  Fauna,  xl  v,  211 ;  Meigen,  Syht.  Beschr.,  iii,  1530, 83 ;  Fab- 

ricins,  I'.nt.  Synt.,  iv,  :iOd,  11-i. 
Sijrphiifi  [fix  >!fiyen,  8ynt.  Bcsclir.,  iii,:?i!0,  67. 
Si/rphuH  luelliirius  Moiyen,  Sywl.  Bi'sclir.,  IW8,  pfl. 
Siiriihns  uiclliliirf/ua  Mi'iji.cn,  Syist.  Beschr.,  iii,:>'-iO,  82. 
Melniinnlom(t  mt'lUna  JSc'liiiicr,  Fauna  Aiistr.,  i,v!l)l. 
J/(7((»o,v/()//i(/  scidarin  Ostcn  Sacken,  Cat.  Dijit.,  Iv^l. 
f  MelaiwHtoma  /iniinoKa  Bij;ot,  Auiuiles  Soc.  Eut.  do  Fr.,  1884,79. 

Habitat. — Europi',  North  America! 

i,?.  Length,  (5  to  7""".     iShining  metallic  or  black  green.     Face  per- 

a  a ♦^  base   iiiiiiP6B<l'''"dav,  lightly  (histed  on  tiie  sides  with  whirish  ;  tubercle  small. 

lickeued.     ^\  Frontal  triangle  a  little  prominent,  gently  pitted  in  the  middle;  front  of 

thefemale  Imt  litth'  narrowed  behind,  below  the  middle  with  a  broad 

)n    G,  Diinffii'®^*^^''^^^'""'^^'*''''***^' '^''l.>''^'^'"*i«>"' ""  either  v«;ide  of  which,  near  the  eyes, 

■  whitish  dusted,  below  nairowly  coiine(!te<l  with  the  dust  of  the  face; 

elsewhere  the  front  is  shining.     Antennae  blacki.sli  brown,  the  third 


i,  23;  Wiedeuii 


ick, shining;  u 
grayish  poUc'i. 
the  ground  c 
g  so  far  tbrwii 
iiore  or  less 
al  triangles  ii. 
u'k,  pile  blaci. 
1,  on  the  ])k 
oval,  th(»  st'i 
shining;  scr 
xtending  oii 
■d  and  Ibiirtlr 
riangular  si"i: 
ngular  spotii' 
fourth  scjiii 
maining  segiii' 
lora  yellowi 


Fill, 


1       'I 


l!l^ 


'1  i 


14 


if- 


i  " 


50 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


joint  below  often  yellowish,  soniotimef,  the  yellow  prevails  on  the  seeoi, 
Joint,  or  rarely  the  whole  antennii   nniy  be  yell(»wish  ;  arista  yeilow 
bfise.     Alxloinen  of  the  male  with  three  pairs  of  iarjie  yellow  spots.  \\ 


first  pair  usually  smallest  and  near  the  middle  of  the  seyi'ient  ;  sa 


'(•(II 


jiiiir  usually  the  lar;.;<'st,  cjuadran^ular  ;  tliiid  pair  similar,  l)ut  smiilli 
tlie.se  leddish  yellow  sjxjts  leave  only  the  opa^pie  black  as  a  nan 
median  stripe  and  posterior  (;'.oss-band ;  hind  border  of  fourth,  and  ri 
(ilth  sej;inent,  shining.     ^Mtdomen  in  the  female  mor»>ovid,  wholly  s\v. 


and  w 
endbl 

narro 
segDie 
green, 
oral  y 
yellow 
segmei 


similar 
lateral 
segDiei 


inji',  witii  four  pairs  of  red  or  yellowish  si»ots  :  Ihe  hrst  pair  sm;ill, 

('a(;h  side  oi'  the  middle,  and  not  touc.liin.i^'  tlic  laterid  marj^ins,  seen  .  , 

and  third  ]»airs  touehiny  the  anterior  margin,  in  shape  like  a  rijilil;i:i. 

trian.ule,  the  i)oint  directed  back  and  broadly  rounded;  on  tlic  lit     ,    .. 

segment  smaller, neaily  eonti.tiuous.     Lej;s  vaiiiiblc. reddish  yellov.  (\  « 

sritlarc]  with  brownish  rliijis on  the  hind,  oi'  on  all  the  til)ia!;  or  soiiietii;  -         ' 

the  lej:s,  ex(!ept  the  front  pair,  almost  wholly  l)i'ownish  (var.  meUinii,.^ 

the  l)ase  of  the  tibiae  lighter.     Hind  metatarsi  in  aiale  not   tliiek(ii.„„^      ,' 

scarce]) 
^VinJ4s  tinji'ed  witli  brownish  yellow,  sometimes  faintly,  at  other  lii  „pji     / 

<l''*'l''.v-  ^   pre"; 

About  r.Kt  specinuMKs  fronj  Europe,  New  Eujiland,  Kansas,  iiii!l 

Pacilic  States.  A  very  variable  species  in  the  color  of  I  lie  antenme.  i,  MTelaiios 

wings  and  abdominal  sj)ots,  which  explains  the   number  (»f  its   sv  '  '" 

nyius.  ^^'''f' 

As  in  Europe  tin' species  is  very  common;  of  them  Scliiiu'r  saysd.  '*"OUs  s 

'•Die    liieblinu's    aufenthalt    dieser    kleinen,   schmalleibigeii    iiniKti  '"' 

Thiere  sind  Ilohrbestsincle,  <loch  linden  sii'  audi  an  Biiclien,  in  leud     "•/'"' 

Wiesen  und  iib<'rhaui)t   iiberall,  wo  es  iip))i<;en  (iraswuciis   luid  l'        ^'•^*' 

men  gibt.     leii  habe  tausen<l('  von  alien  moulichen  Stiiiidorten  eiiiLii 

gen,  sie  felilen  auf  keiuer  Excursion  und  laugweilen  eiitllich  dei;  ;i;:'.''P*""' 

Dipterologen,  da  sie  sciieinbar  immerneu,  bei  gemuierer  lJnteisu(  h  ^^^^)  ■'" 

doch  welter  niehts  als  Varietiiten  der.selben  veriindliclien  Art  sclieii  '        * 


Tiie  only  <litfereiu;e  that  i>igot's  description  of  M.  pruiiidsd  (  9  )  s! 


litido. 
ntice  CO 


is"ai>domen  d'un  iioir  opaque,  base  et  extremite  un  jieu  luisantt 

'',1/.  fp'ocilis  Meigeu  and  JA  mdcniosa  Meigen,  both  I-hirojicin!. '  *  P'" 
stated  to  occui-  in  North  America  by  IMr.  Walker,  List,  etc.,  iii,  .">ss.  ^'  '^" 
Mr.  A'Vrrall  inlbrms  m(>  that  'those  two  si»ccies  are  synonyms  ol 
(it'iii  h'ab.  [M.  mHHinn)!].  But  Mv.  Walkers  tSi/rphns  iikicuIonus  ii;i-  ^"*''> 
rei»resentatives  in  the  iiiilish  Museum,  both  Pldiijcliiri,  one  reseiii 


F.  hnmarginutuH  Zett.,  the  other  resembling  i'.  scamhnu  Staeger.'"   ( 
Sacken.  Cat.  l)i|)t.,  122. 


nseo-Iiy 

|laB  desii 

uarta  sn 

irminaii 

MelanoB'oma  angnstatiira,  n.  s|).     (t'latc  IIF,  lin.  7.)  asi  inl'er 

JlnhUiit. — Washinglou  Territory  !  ipto.br; 

£ .  Length, !)  to  Ml""".     Allied  to  M.  nielli )nnii,  but  the  face  is  iiioicbdooieu 
jecting,  and  the  abdomen  is  longei'  and  more  slender,     l-'ace  sin;  Jonge  p 
metallic  greenish  black,  light  ly  dusted  with  white,  nearly  jierpendiir'evissim 
in  the  middle  with  a  rather  jnondn.  nt,  small  tubercle;  cheeks  ccMhistace 
below,    rrontal  triangle  gently  swollen,  with  it  HUutUpitin  the  ni^edes nig 


SEUM. 


SYNOPSIS    O'.     NORTH    AMERICAN    SYRPHID^E. 


^on  thesecoi,  g^jj^  ^j(^],])l,r,ckpilo.  Anteiinfr,  reddish  .yellow,  tlio  third  joint  at  the  outer 
iista  yei.ow  gii^l)l;i(.l;i.sii.  Thorax  and  isciitellmn  brigfht  metallic;  green.  Abdomen 
'How  spois.t'  jjgjj.(,^^.^  cloiiifate,  artainin{,'it.s  greatest  width  at  the  end  of  the  fourth 
-ii'ient  ;  sccoi  ggg^j,,,^ .  iij.^^  segment,  and  the  front  part  and  sides  of  the  second,  Itronze 
ir,  but  sniiill.:  gjig^,,^  ,|,,t  nuicli  shining;  second  segment  in  the  middle  with  two  small 
ck  asansni  ^^^j  vcilow  sjiots.  heliind  subopaque  l>hu;k  ;  third,  with  two  elongate 
fourth,  and  ti  y^jj^j^y  .si»ots,  reaching  from  the  front  miirgin  to  beyond  the  middle  of  the 
id.  wholly  >ii!  gggjjjj.iij.^  .jjijj  ^,„,(.i|j,|o'  tiie  lateral  margins  in  fiont;  fourth  segment 
pair  smiill.i  gjjjjjj.,^^  ],„|-  .\^^,  ^pots  a  little  less  elongate,  and  the  posterior  jiart  and 
margins,  seen  jj^^gj,.,;  ,|,;iv^iiis  of  t lie  segment  shining  green  ;  the  neaily-coneeaied  llfth 
ke  a  right  :iii.gggPi^.ij,  .^^^^^  Hi^.  iiypopygimn  shining  green  black.  Legs  sometimes 
.(I;  on  the  'i' ^ijoUy  ycUo^v,  excciit  a  brownish  ring  on  the  front  tibiae;  usually  the 
lish  yeUo\".  (^  front  and  middle  femora  and  tibia'  with  broad  l)rown  rings,  and  the  hind 
ic;  or  sometni  fgmo,,.,  ,,,„i  (ji^j.,.  „iti,  l.ir);i(l black  I'ings;  the  front  tarsi  li;;litly,  the  hind 

■meliinii, 
i  not   thickeiHgg^gj,,^.  .^^  .^11  tiiiekened 
■,  at  other  tiiypijQ^.' 

Five  specimens,  Washington  Territory  (II.  K.  Morrison). 

Kansas,  ami  ' 

1  4-  ,.,...    1.  Melauostonia  tiichopus. 

le  anrenna.i'.  . 

Si/r/iliiin  InclnijiKK  I  lioiiisdii,  Eii^i'iiii's  ri-s;i,  ctf..,  ii(l-2. 

iber  ot   its   s\ 

Habitat. — ('alifornia  (Thoms(Mi).    Niger,  facie,  abdominis  maculis  latc- 

'alibus  siaitelloque  plnmbeis,  tibiis  tarsiscpie  anterioribus  dilute  fuscis. 

3.     Long.  .S-i»  mill.     Patria,  California. 

J9,  J'ciicslralo  'SlXCi.i.  simillimus,  thorace  hand  viriui,  eosta  in  apiee 


(var.  '"'^"'""' tarsi  except  the  tip  of  the  lirst, joint,  darker,  brownish;  hind  metatarsi 

Wings  tinged  with  brownish,  the  stigma 


climer  says(i 
ibigen  minit 
ichen,  in  iciic 


'  ,  ,  pso  exciirreiite   distinetns.     Caput  heniis|)l!iericum,  interne    brevirer 

''^  'OStrato-productum,  infra  antennas   vix   impressun*,   tnbereulo  supra 

iiidortenemui-  '  .    .  .  ,•.•',., 

1  .  ,  ,  ,  "''yP*"'"  parvo;  occipitt  opaco  iuneo  iiigro;  oenlis  tronte  late  eohicren- 

'"    ,,  '    ,  ibttS,  interne  ad  os  haud  descendentibus,  margine  po-s  ;c;o  vix  sinuato, 

1' IJntersui'iii         '         .  .  ,  .  .,  . 

,    .  i/lDiaopruinoso;  tronte  supra  antennas  dense  nigropilos;i ;  episio;aate 

,  dtido,  a-neo,  lateribus  parcius  albidopubescenti,  apertura  oi'is  ol)longa,- 

"'".    ^         ..  ntice  (;onstri(!ta;  genis  linea  oblicjua  impressaab  e])i.stomate  discietis; 

"    ,  ^'  "ula  pliimbea,  ]>allido-piiOsa.     Antennaj  l)asi  panllo  distantes,  <livari- 

'     '    ...   -', ,  atae,  .^iilxlellexa',  nigra',  articulo  .'{:o  elliittico  brunneo,  seta,  basi  niuri- 
etc    111.  •)'^>^.  707  I 

■'  ..  ante.     Thorax   idumbeo  iiiger,   subopacus,     iusco  i)ilosus:    scutellum 

viionvms  el  .  '  .       ".   '  '  ,    ,       ■        , 

lumbeo-virescens,  longuis  nigro-i)uosum.     Ahc   abdomine    longio"t>s, 

""  '       '    '     '  ,  ri8eo-h\alina%  eelluhi  i)ost-costali  obsc-ure  llava;    eosta  in  ipso  apice 
(,  one  reseiiil ,       ,    '.  u   1      i        •  1  i-  *  1  ••         • 

l8B  aesutente,  eellula  ULScoulali    nervuiu  transversum  ordmaruim    in 


: Staeger 


.  '  "    (  )- 


uarta  sua  anteriore  ])ar(e  excii»iente,  nervo  exteriore  hand  llexm»so  efc 

jrmlnali  apice  extus  appeudieulo  parvo  in;  tructis,  hoc  neivo  exteriore 

asi  inferno  llexuoso;  nervo  spurio  ante  a]ncem  celluli^-,  "'scoidalis  ab- 

ipto,braehii  abscissa 4: o  ta  nervo  transver.so breviore.     IJalteres  iiigri. 

efaeeis  moiv.bdomen  thorace  (fcimidio  longius,  apicem  versus  angustatum,  sat  dense 

er.     Face  slivilonge  pra'serlim  hasi  fusco-pilosum,  atroholosericeum,  segmentis5:o 

I'ly  ])er])enil'.' 't^vissiuK*  et  G:o  tot  is,  l!-!  maiailis  lateralibus  prope  basin  plumbeo- 

le;  cheeks  c' -liistac cis,   his   fas(.'ias   seiisim    mimis   late    interiui)tas   formantibus. 

1  pit  ill  the  111  edes  nigri,  femori'ous  omnibus  tibiisque  posteriorilnis  sate  louge  pilosis, 


52 


BULl-ETIX    31,    T'NITED    STATES    XATIOXAE    MUSEfM. 


i'l 


jj(Uinl)iLs,  libiis  tiu>is([ii('  iiiitoiioribiis  bnuiiico-i'iiM'is.     IN'ctus  niiiili  tr©8; 

])!uiiib('iiiii,  pjircius  ])il(isuiii.  i»hiiinil;i  siibalis  et  ])('iiti('iiKit«'  spiiacr  olAirs 

riiiii  nlbidis. — 'riioiiisoii.  8008  I 

I  ciiiiiiol    i(h'i!(il'v   this  siiccics  with  niiy  of  tlie  Ibi'cjioiii^;,  thoii-i  (lOT/ici 

ruiiics  iii'iirt'st  lo  .1/.  lij/ftiiiihi.     rt  is  more  thiiii  ])r<)biiV)le  that  it  will  sa  biif 

Ibiiiid  anion;;'  Ihnsc  ilcscrilird   l)y  liiii'ot.  4*,  de 

'i'hc  tolhiwiii;^' spt-cics,  (Icscribcd  i)y  Mi',  lii.yot.  pi'obably  Ix'lon;^'  tut:  cdteis 


j>oiiiis;  yet  l'hil)/cliini,s  slx-uld   not   he  lost   si;^ht  ct'  in  ciidvavoi  in;: 
idem  iiy  'lii'iii.     It  is  very  probabl*'  thai    some  of  thciii   art?  syiioii\ 


of  s])cci('s   aii'cad.x'  drscri!) d 
siilli*'i*'iit  to  dctci'iuiiK'  tlicm. 
syiioiiyin  of  J/.  uuU'nnuii, 

Melancfitoma  ?  pruiuosum. 

Ml  Idiiiixliiuiti  .'  jiriiiiii}.s(i  l)ii;oi 

7A//^/M^_Ca!ifoiiiia  (Wv^.) 


l>iil    my  iiiatoria!  and   patience  arc 
M.  Iiniiiio.'oiii)  I  have  ;^i\eM  as  a  i)i()li.i 


Am.  Sor.  Enfc,  Fr.,  1884.  7L>. 


annea 

pres(p 
teniio; 
saut  1 1 

Melant 

.1 

Bah 
i  L 


9.    Lon;;.  S""".     Aiili mils  Jitlris.  ojncc  fiiscis ;  fyontv  rt  facie,  nui        '  ' 
nitidis,  itiriiuiiic Jtiirit  /.'fuiiiosis;  thotutci'  nigro,  oljscKrr (I'lwsi-oiti';  cttbip-  ^*^^^' ^ 


cynoe  a 
bm  fu 


tdlfis.  l(((lt(rihiis  J'ldri.s.  ilarn    t'uscii ;  iiltdontinv  nifirn  oimco,  sripiKiiti 
iitriiifjuc,  iiKiiuIn  ol>ll(jKi'(,  oitloiifia,  .'»"  vt  t",  nutvulis  xtfiiKjiic  latis,J'ri\ 
oi>i;!s,  .">",  Iinii'li.s  liitcntliltKs  Jlaris;   jujlilms  Jlnriilis,  J'(:i)ioril>iis  tili'n-  parum 
jHsro  itininUilis.  s(V})r  riaiicscentiltus,  tarsis  jioslicin j'hsca ids,  in<-isitri. 
Iliiridis;  (ids  hi/tdiids. 

..\n;ennes  fames,  bonis  siiperieiirs,  ex'treniite  ii  (diete.  bniiis:  i 
et  face  (run  noir  luisant,  converts  dc  cha<ine  cott'  pa)'  une  prnin 
jannau'e  qui  s'etend  notablenienl  au-dessus  des  antennes;  tlM)iu.\.i 
soi:  d'nn  noir  lui.sant  a  reliefs  bronzes:  tlancs  a  diiNcf  bianehiVtre: 
leroiis  l)huics.  bahuiciei's  fauves,  niassue  bninatre;  abdnnien  d'uii 
o]);t(j:! '.  I);!s(- et  extreinite  un  j)en  luisantes,  2'' se,iinieiit  avee  (b'lix 
cuh's  oblicines,  ovaloides,  diveruentes  (hi  e(')t(''  ant(''rieur,  o"  et  1'. 
deux  lar,u'cs  macules  basilaires.  trijionales,  joijiuanl  les  c(")tes,  d'nn  j;i  MAlano 
fiuve;  pieds  testacds,  cuisses  et  til>ias  avee  des  anneaiix  b"inatrcs 
Jois  pen  distiiicts,  tarses  avee  I'extrt'mite  lirunatre,  les  posterieurs 
t'()ne('S  ave(!  les  arlicnlations  lar^einent  jaunatresj  ailes  hyalines. 


Ant( 
ch^te  1 
pruiiiei 
nNjiset 

po8t6ii 
les  c6t( 
bran  la 

Antem 
passan 


i/ 


HabI 
9.  I 


(eiiiies,  ;;<■  seniiient  ovale;  abdomen  etroit;  ailes  depassant  a  peiin  i*^*^^  ' 


extremite.     Calitbrnie 


thora(( 

domiiiv 

ntrim/u 

teataico 

tarsis  It 

nigris. 


— 'J  specim. 

Melauostoma ''  pictipes. 

Mitaiiiiisloma  ?  pictiiiia  Bijiot,  Aim.  Soc.  Eut.  Er.,  Ih'84,  78. 

.77V//>/^/f.— California  ( \Vv^.). 

i.  Lony,  0""".  yitjra,  })a>\ini  idtiila.  Antmnifi  caataneis;  i 
nitida ;  farir,  ufriiifjiic  ciiiereo  prninosfi;  ((dj/ptris  et  holteriJms  J\- 
id)(l()»iiiie  idiffo  ojxivo.  Ixxsi  albidn  pHosidd,  tipiee  et  utri)i(juc  nititlo: 
cuds  hiisadlms,  ntHiiqiie.fcii'  tritjonis,  cinercis  poruin  metatlcseentiliux: 
'ihns  J'iilvis,feni()ril)iis  tdddsque  l((te  fasiv  nitjro  cmmdatis  iursis  ((jh 
iiifiisc(dis,  post  iris  fnseis;  ads  fere  hyaUnis,  maciiiu  stifpuatieali  tcsUu  laiftan 

Antennes  iioires,  ;.!«  seymeut  et  chijte  d'un  taiivo  ol)scur;  front     ^cnssoii 
luisant  il  polls  uoirs  j  face  noire,  callosito  laisa<ite,  cotes  t\  retlets  g: 


'  Eesei 
prolonf] 
fadtcs, 

t 


"% 


Pt'clns  iiiiiiii 
H'limtt'  spiiiici 

■;^'oiii,n,   tlKiiiu! 
)le  tliiit  if  will 

l)ly  Ix'loiijj;'  tnt 
i  eiKU'avoriii.; 
Ill  are  syiioii;. 
|)iitit'iK;t'   arc 
V  t'li  as  a  iir()l>„ 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHID.E. 


53 


fc  rt  facie,  niij 
nrxciiitc;  citliip- 
fhico,  sf'tpm iifi 
uqiic  ltitis,l'ii; 
cnuirihii.s  lihii- 

(lldK,    illciNIII'l-' 

K'tc,  bruiis :  i: 
ar  line  ])niii!n' 
lies  ;  ll!()ia.\.  i 
■,  blaiieliiitic;  t 

ixiiiiiH'ii  (run 

lit  avec  deux 
ear,  o"  et  4' . ,; 
s  (;utf's.  <riiii  '].. 
MX  b'Miiatri's 
s  postei'icuis 
cs  liyaliiu's. 
issaiit  a  iieiiii- 


casta neis;  h 
lialteribus  I'n 
)Inqiic  iiititlir. 
tailc.secnti  !)>('<: 
(lis  iarsis  ((pi' 
•malii'tdi  IcsliH 
hseiir;  front  : 
les  il  retlets  g: 


tWis;  thorax,  dcnsfson,  d'un  noir  un  i»eu  bronze,  couverts  d'nn  duvet 
dAirseiiie  roussutre,  flaiics  t\  duvet  gris,  uue  petite  toutJe  de  polls  blaucs 
8008  les  cuilleroiKs,  ce8  dc^ruiers,  aiiisi  que  lea  balanciers,  testac^a ;  ab- 
domen (I'liii  noir  opaque,  muni  de  duvet  blanchatre,  priiicipaleuient  di 
sa  base,  V^  segment,  bords  latc^ranx,  marges  des  4«  et  5",  luisauts,  3"  et 
4",  de  cliaque  eot^;,  avec  une  inaeule  basilaire  trigonale  joignaiit  les 
c6t€'s  et  d'un  gris  d'acier;  pieds  fauves,  euisses  et  tibias  avec  un  large 
anneaii  noiratre,  tarses  uoirs  ii  IVxtrdmit^,  postdrieurs  cliatains;  ailes 
pres(|ue  hyalines,  macule  stigmatitiue  etroite,  allongee,  roussatra.  Au- 
tennes,  3"  segment  ovalaire,  oblong;  abdomen  6troitj  ailes  ue  d^pas- 
gant  pas  .son  extr6mite.    Calitbrnie — 4  specim. 

Melanostoma  ?  bicruciatum. 

MihuiOKtomn?  hieniciata  Bifiot,  Ami.  Soc.  Eiit.  Fr.,  18S4,  79. 

JS^a/>//a^— Caliibruia  (Big.). 

i  Ii(»ng.  7""".  Anfcnnis/ulvis,  npice  funds;  facie  ctf route  nign's,  niti- 
dis, nlriiiqne  cinereo  priiiiiDnix;  thorace  scutelloquc  nigris,  obncnre  (vne- 
scentihux;  cahiptriH  of  haitcrihaa  tenfaceis;  ahdomine  nigro  opaco,  baai  et 
apicc  aiigiiNtc  vitido,  vtrinqne  viaculiN  tribiis  latin,  quadratic,  fuivin ;  pedi- 
bus  fiilrin,  femoribxiH  fibiisque  late  funco  paUido  anmihitis,  tamis  apice 
parum  infuHcafis;  alis  In/alinis. 

Anteimcs  fauves,  brunes  en  dessus  et  a  i'extnuiiite  du  .'5''  segment, 
ch6te  bniii;  front  d'un  noir  hiisant;  face  de  iiieiiie  avec  relicts  d'un  gris 
pruiueux  siir  les  c6t(!'s;  thorax,  ecnsson,  noir.'-".  ti  relicts  bronzes;  cuille- 
rons  et  balanciers  testaces;  abdomen  d'un  noir  ojiaque,  !"■  .segment,  bords 
post^i'icurs  des  4''  et  ry  luisants,  six  larges  macules  earces,  alteignant 
les  cotes,  fauves;  ]>ieds  fauves,  cuisses  et  tibias  largemeiit  aiinel6s  d'un 
bruu  lave,  cxtremite  destarses  brune;  ailes  hyalines,  stigiiiate  fort  pale. 
Anteiuies,  3"  segment  ovalaire;  abdomen  etroit,  oblong,  ailes  ne  d6- 
passaiit  ])as  son  extr<''niit<S.     Califoriiie. — 1  specim. 

Milaiiostoma  ?  rostratum. 

MilaiiiiHloiiKi  '!  roHtraia  Hisot,  Ann.  .Soc.  Eut.  Fr.,  1884,80. 

Haljifat. — (jalifoniia  (Big.). 

5  .  Long.  7""".  Facie  prominentc,  obtusa.  Anteiinis  fnlvis,  ba^i  et  ftu- 
peme  infaseatix;  fronte  et  facie  nigro-rtitido,  ntrinqiic  cincrco  pruimms; 
thoravi  scKtelhxfiic  uigris,  (d>ficure  a'neis  haltrribvH  paUidc  testnceiii ;  ab- 
domiiir  nigra  opaco,  apicc  auguatc  nitido,  lined  tcmii,  dorsali,  cinerascente, 
utrinqiic  maeiiUs  tribus  latis,  fere  qtiadratifi,  cincraHccutibus  et  obscure 
testaiia  pictis;  pedibuH  fulcis,  fcinoribus  posticoruni  iuterniediorumqne, 
tarsis  basi,  apice,  nigris,  fibiis\  late  pallide  fusco  annulatis  pedibuH  postieis 
nigris,  gcnieuUs  fuicis;  alis  hyaUnis  macula,  stiginaticaU,  clongatd^  testa- 


Resemble  a  la  M. '?  nictipcs,  iiiais  en  dift"6re  surtoiit  par  la  face,  qui  se 
prolonge  seiisiblement  en  avaiit  sous  la  forme  d'un  obtus.  Antennes 
faittes.  iioiratres  a  la  base  el  en-dessus,  ch6te  briiii;  front  d'un  noir 
luiftaiit  ain.si  (jue  la  face,  eelk'ci  ii  leflels  gris  sur  les  cotds;  thorax, 
^dOsson,  noirs  a  refle's  bronzes,  tlaucs  a  di.vet  blanchatroj  cuillerona 


1 1 


•:  \ 


i\  ¥ 


ir 


1.1    1 


54 


BULLETIN   31,    UNITED    STATES    NATIONAL   MUSEUM. 


blancs,  balanciers  testaces;  abdouieu  (I'lin  iioir  uiat,  premier  et  deruir  neot  V( 

Hcjiiiients  iin  peu  luisaiits,  uiie  ligue  inC'diane,  etroite,  {jrisutre,  et,  lat  flattein 

ralcmont,  trois  larges  macules  carrees,  attei^iiaiit  les  bords,  d'un  }j,n>  wards 

retlotH  fjMives;  i)ieds  aiiterieiirs  et,  iiiteririediaires  fauves  avec,  las  lii  third 

<l('s  <;iiiss('s,  IVxtrdinite   des  tarses,  noires,  un  large  aiiiieau   bruiuii  jeoting 

aux  tibias,  pU'ds  postc'rieurs  iioiratres  avec  les  genoux  fauves;  aii  either 
hyalines;  macule  stigmaticjue  d'un  jauiiatre  julle ;  3''  segment  <le.s 
teiines  allougY',  ovaloide;  abdomen  litroit,  deprime,  plus  court  que 
ailes.     (Jalitbrnie. — 1  specim. 


Our 
geuus. 
Platyc! 
specim  I 


Abdoiiic: 
Abdoinc 

tuiiii 


Melanostoma  ?  pachytarsis. 

Mcltiiiontiima  t  yxichijInriiiH  Bin<>t,  Arm.  8oc.  Eiit.  Fr.,  1H84,  80. 

Hahilut. — Califoinia  (Big.)- 

9.     Long.  7""".     Autenniii  fulvis,  apice  7iigrifi;  facie  et  fronte  niij 
iiitido ;  thorace  HvAdclloquc,  ni</nN,  oLscnrc  wneis;  cali/ptris  alhisy  halti 
hnfi  pallitl^  Jhivis;  ahdomhie  nif/rn,  2"  Hecjmcnto  macnlin  duo  rotimdatiti.   pyrophe 
(■/  1"  hdsi^  vfriMfjue,  iiiavuh'.s  fere  triffonis,  ."»"  basi^  I)i)n(Ii.s  duo  fulri.s;  ,  A// 

dil>u.sj'iilri.;,  nicUitnrso  po,stico  purutH  incransalo^/eitioyibus  tibiisqiw  pus 
CIS  Idle  u'ujro  ofniulafis,  tnrsin  oDniibnn  iiifjris,  incisuris  fulviii;  alls  hi. 
Unix,  macula  louya  .stiymaticali  pallidc  tcfitaccd. 

Anteiines  f.uivcs,  extremitc^  du  3'  segment  et  clifite  noirs;  front 
face  d'un  noir  luisjint;  thorax,  ecusson,  noirs  avec  relicts  bronzds;  ( 
illerons  blancliarrcs,  balancier.s  d'un  Jiuine  ])rde;  abdomen  iu)ir,  i)r«'iii: 
et  dernier  segments  luisauts,  2"  avec  deux  i)oints  ronds,  3''  et  4"  avi 
de  chaque  (!6t6,  uik'  large  macule  trigoiude  basilaire,  n'atteignant  ]> 
les  bords  hiteraux,  le  sonimet  dirig^  en  arriere,  5*'  avec;  deux  bum 
basilaires  lauves;  pieds  fauves.  cuisscs  et  tibias  posterieurs  largeiiit^  ^'''***^^  ' 
anneles  dc  noiratre,  tibias  anterieurs  et  interm^diaires  avec  les  pa!  *  '  ®  1""* 
vestiges  de  semblables  anneaux,  tons  les  tarses  noiratres  avec  lei; 
articuliiti»>ns  fauves;  ailes  ])resque  hyalines,  stigmate  (itroit,  alloii: 
d'un  jaunatre  ]»ale.  Aiitenncs,  3'-  scguieut  court,  ovaloide;  abdoui' 
^Cioit.  deprim''^;  ailes  le  de[)assant  notablemeut;  metatarses  post^riei. 
legerement  epaissis.    Califoruie. — 1  specim. 


,Sro 
I'll 

Habit 

i,  9 


ADDITIONAL  NORTH  AMKRICAN   SPECIES. 

Melanostoma  ?  aiithracoides  15i,iiot,  Ann.  Soc.  Eut.  Fr.,  1884,  82. — Panama. 
Melanostoma  ?  annuliferiim  Bif^ot,  ibid.,  84. — Jklexico. 
Melanostoma  ?  cruciatum  liij^ot,  ibid.,  81. — Mc-cico. 
Melanostoma  ?  quadrinotatum  Bigot,  ibid.,  77. — Mexico. 


PYROPHJINA. 


domen  \ 
the  thii( 
at  base 
darker  » 
flection, 
low  or  y 
I  do  n 


Pyiophae 


Scm 


Si/rp 
I'lat 

Pyropkama  Sohiner,  Wieu.  Eut.  Monatsclir.,  iv,  21.3,  1860.  ^'■'"'' 

Medium  sized,  black,  nearly  bare  species,  with  ferruginous  or  oran;    ■"^"''" 
yellow  bands  on  the  abdomen .    In  structure  closely  allied  to  Melanostot     °  '  *  • 
and  Platychirus,  but  distinguished  by  the  much  larger,  more  proa  J'^" 


USEUM. 


SYNOPSIS   OF   NORTH   AMERICAN    SYRPHID^E. 


55 


luier  et  deruic:  neot  vertical  triiiiigle,  the  ocelli  being  situated  further  forward,  by  the 
rittutre,  et,  lat  flattened  iibdoiiien,  which  is  long  oval  in  shape  and  more  narroN\ed  to- 
rds,  d'un  }j,ii>  wurdH  its  base,  so  that  its  greatest  width  is  attained  at  the  end  of  the 
4  avec,  las  l);i  third  segment;  the  wings  also  are  shorter  and  broader,  scarcely  pro- 
ineau  bruiiiii  jeoting  beyond  the  end  of  the  abdomen.  The  tarsi  of  the  male  may  be 
IX  tauves;  ail  either  (lattcned  or  simple.  Type  of  genus  J*,  oeymi  (Fabr.)  Schiner. 
segment  «U'.s  u  Our  two  .species  are  also  European,  and  the  only  known  ones  in  the 
s  court  que  1  geuus.    The  genus,  ta.xonomiciilly,  is  equivalent  to  Melanostoma  and 

Platychirus  combined.     The  Hies  are  apparently  rare;  I  have  but  two 

specimens  collected  in  this  country. 


;3  TABLE  OF  SPECIES. 

AbdoDicn  larjicly  reddish  yellow ;  front  and  niiddh)  tarMi  of  the  male  llattened..ocymi. 
et  jronte  nuj   ^btiomen   lilack,   witli  two  roddiHh  yellow  Hpots  on  the  third  sej^nient ;   front   nu'- 

iS  albifi^  liaiti  tuiiiisi  ()lMi;il»<  not  Ual  toned roaarum. 

uo  rotundath.   Pyrophaena  rosarum. 


l^liriilni^  romiriim  Faliricinn,  Mantissa  Ins.,  ii,  :i41,  71 ;  Entoin.  Syst.  iv,  'Mt7.  109; 

Mci;;i'n,  8yst.  Bcsclir.  iii,  liliS,  91;  Piinzor,  Fauna,  cviil,  14;  M;h  ([uavt.  Hist. 

N.it.  Dipt,  i,  .540,  :{9  ;  Walker,  Ins.  IJrit.  i,  a95,  HO;  Schiner,  V.-rh.  Z.  B.  Ge.s. 

vii,  l!.')7. 
:Siirj)hiin  iiocliliicuH  Panzer,  Fanna,  Ixxii,  5i4\nnile). 
iScaira  rosurinn  Fahrieins,  Antl.,  '^'>l,  11;    Fallen,  Syrpli.  47,  22;    Zetterstedt, 

Dipt.  Scand.  ii,  Tf)'),  and  viii,  lUTrJ,  58. 
I'l/rojilidiia  roKuniin  Schiner,  Wien.  Eiit.  Monatschr.,  iv,  213;  Fauna  Austr.  i, 

29H;  Osten  Sacken,  Cat.  Dipt.,  12-,'. 

Mahitrif. — Europe,  N(U'tli  America  (().  S.). 
S,  9.     Length,  <S  to  9""".     Antennae  black,  the  third  joint  below 


,•  duo  fair  is;  j 
(.s  fihiisqiic  pii\ 
fulviti;  alifi  h 

noirs;  front 
ets  bronzds ;  1 
en  noir,  pn'iii: 
Is,  3'=  et  4"  :iv. 
I'atteignant  ]■ 

ec  deux  lunui 

1      ,  ,    somewiiat  liuliter  colored.     Face  metallic  blue,  straight,  the  tubercle 
leurs  largeiut  ■  »  &     > 

,        ■  little  ])rominent.    Thorax  with  two  approximate  whitish  stripes.     Ab- 

,  „ domen  \elvet  black,  with  the  exception  of  two  reddish  yellow  si>ots  on 
btres  avec  ieii  '  ^  j  i 

M  •  't     11  I       *  third  segment,  an<l  the  last  segment,  shining.     Legs  black,  yellow 
'  "at  base  ».f  t'biic.    Wings  tinged  with  gnayish,  in  the  middle  with  a 

darker  spot.     Thorax  shining  dark  green;  scutellum  with  a  blue  re- 
flection.    In  the  female  the  legs  chiefly  steel-blue;  four  front  tibiae  yel- 
low or  yellowish-brown,  their  tarsi  almost  wholly  yellow. — Translation. 
I  do  not  know  this  sj)ecies. 

Pyiophaena  ocymi.     (J'late  III,  tijrs.  i:i,  V.ia,  Vib,  V.ic.) 

Si/rpliii>t  ocymi   Fal)ricius,  Sy.st.   Ent.,  iv,  309,   114;  Panzer,   Fauna,   Ixxxii,   18; 
Mei^cn.  Syst.  Bfsehr.  lii,  :?87,  93(foniale);  Macqnarfc,  Hist.  Nat.  Dipt.,  i, 
54(j,  40  ;  Schiner,  Verh.  Z.  B.  (ies.,  vii,  :i()2. 
Si/rphuH  lobat'i8  Meigen,  Syst.  Bescbr.,iii,  IWG,  92  (male). 
Sc(pva  octimi  Fabricius,  Antl.,  252,  18;  Fallen,  Syrpb.,  48,  23;  Zetterstedt,  Dipt. 

Scand.,  ii,  7.'54,  and  viii,  31")2,  57. 
Syrphus  (jranditarsua  Walker,  Ins.  Brit.,  i,  295,  29. 
I'ldlijchciruH  ocymi  Stgeger,  Kroj.  Tidsskr.,  iv,  320. 

I'Hiophonii  ocymi  Schiner,  Wien.  Ent.  Monatschr.,  iv,  213;  Fauna  Austr.,  i,297. 
Habitat. — l']uro]>e,  North  America! 
S,  9  .    Length,  8 to 9"'".     Metallic  black.    Antennae  brownish  black, 


oide;  abdom- 
rses  post^rici 


.— Panama. 


iuous  or  oran; 
to  MelanostoR 


ir    more  proa^'^^'^  j"'"*^  convex  below,  nearly  rectangular  at  the  eud  above.    Face 


66 


BULLETIN   31,    UNITED   STATES   NATIONAL    MUSEUM. 


'    I,   •'! 


^li 


i 


Fr 
3.-Fn 

Fvu 

Fctr 

Ptatyc: 

■s 

r 
yollou 


bluish  l)li»ck,  in  tlii'  f'cinalo  more  metallic  blue,  witli  tliin,  wliitisli  diis' 
nt'arly  ixMix'tidiciiIiir  in  profiU'  with  a  proniiiiciit,  wrll defined  tubercle 
and  a  smaller  (die  below  it.     Frontal  and  vertical  trianj,Mes  with  Itlii^ 
pile;  front  in  the  female  with  bhutk  pile,  ('xcept  at  tlie  vertex.     Dorsm 
of  thorax  with  three  opa()ue  stripes  in  the  male,  wholly  bright  shiiiii;, 
metallic  preen  in  the  female.     S(!iitellum  shininj,'  bluish  metallic  grcci 
I'irst  sej^inent  of  the  ab<lomen  shininj;  blacik  ;  second  sej^ment  witli 
aiitenor  black  cro.^s-band,  convex  or  dilated  in  tln^  middle  behind;  i 
the  male  the  remainder  of  tlM'  second  sefjfment,  the  third,  and  thcii! 
terior  part  of  the  fourth,  are  oranj^e  yellow;  in  the  fenuile  on  the  jxist. 
rior  anjfles  of  the  second  with  smaller,  of  the  third  with  lar;,'er,  l)l;i 
spots,  the  fourth  and  fifth  segments  with  an  interrni)ted,  anterior,  ii 
broad,  cross  band.     TiC^s  in  the  male  l»lack,  with  the  base  of  all  h 
tibiae  yellow;  the  front  metatarsi  extraordinarily  dilated,  and  with 
]»rocess  directed   iinvanl,  the  remaining'  joints  as  usual;  the  uiidd 
metatarsi  also  considerably  ddated.  the  icmainin^  joints  successive; 
less  so;  posterior  metatarsi  a  little  thickened,  somewhat  elongate.    ! 
the  fennile  the  legs  are  reddish  yellow,  the  front  tarsi,  th(^  last  tu 
joints  of  the  middle  tarsi,  a  ring  on  the  hind  tibiie,  and  the  hind  tni> 
black,  sometimes  also  a  less  distinct  ring  on  the  hind  femora;  in  stiiii 
ure  the  legs  show  no  peculiarities.     Wings  tinged  with  reddish  biou:  nent. 
tiarker  in  the  middle.  and  wi 

Two  specimens  (iom  Holland  (v.  d.  Wnlp),  a  single  female  speciuit  reflecti 
from  Washington  Territory  (Morrison),  and  a  female  from  Labiini  middle 
(Heushaw).  grayisl 

three  li 
nal  stri 
mens 
cross! 

the  lift 

Medium  sized  to  rather  small  species,  elongate,  nearly  bare,  black  oran'-t 
metallic^  green,  with  yellow,  reddish,  or  whitish  yellow  spots  on 
abdomen.  Wholly  like  MelmiosUnna.,  except  in  the  structure  of 
legs.  In  the  male  the  tibia'  are  more  or  less  dilated  in  the  front  ] 
the  front  metatarsi  always,  and  the  remaining  joints  more  oi'  less, 
in  the  female  the  front  tibiui  and  metatarsi,  though  not  dilated  ;i>  gj^g  f| 
the  male,  are  comparatively  broader  than  those  in  Melnnostoma.         uallv 

thicken 
TABLE  OF  SPECIES.  Jfn,, 

1. — Front  tibia)  in  tlio  male  Ki'-i'lmiHy  dihited  from  tho  base,  tlio  tarsi  <;rartnallv  Platych 

ri 


PLATYCHIRUS. 

Platiicheirus  St.  Fargeau  and  ServiJlt-,  Encycl.  Meth..  x,  513,  1825. 


l>ygimi 
last  tw 
one  or 
lated, 


;  I 


creasing  in  widtb  from  the  base  to  the  tij);  prolile  of  th«  face  only  gf. 
concave  above  the  tubercle,  the  latter  small ;  cheeks  convex  below  .  . 
Front  tibial  of  the  male  slender,  suddenly  dilat<'d  at  the  tip,  nKitatarwi  n. 
dilated,  the  remaining  joinls  but  slightly  so  ;  the  front  femora  in  tli"ii 
with  a  thick  row  of  hairy  pill.'  on  the  posterior  side;  face  in  bi>tl 
with  ii  conspicuous  tubercle ;  cheeks  concave  below     ....     pelta' 


Bah  I 

,  vania. 

S.  i 
coveret 


JSEUM. 


sYNorsis  r»r  xoirni  amkrica.n  syrpmid.e. 


57 


1,  wliitish  dns' 
pfliiHl  tul)erclt 

rlt'S    with   llllK: 

•rtcx.  Doisiii: 
bright  Hhiiiiii, 
metallic  {ivm 

.'{illUMlt  witii 
Idle  behind;  ; 
rd,  and  the  ai 
le  on  the  i)()st. 
th  lai'},'«'-r,  l)];i' 
>d,  anterior,  n 
base  of  all  t 
ted,  and  willi 
iial;  the  uiitld 
iits  snecessive 
at  elonj^ate.    1 
si,  the  last  tu 
d  the  hind  tiii' 
mora;  in  sliii' 
I  reddish  binu 

female  speeiiiit 
(  from  Labrad 


1825. 

l.v  bare,  black 
ow  spots  ou  t 
structure  of  t 
n  the  front  \u 
more  or  less,  ^ 
lot  dilated  a> 
Innostoma. 


>,  tarni  grartnallv 
th«  face  only  g'' 
nvcx  below    .    ■ 

tip,  iiititatiir.fi  v: 

t  femora  in  tli- ': 

I'aci.!  ill  1i"tli  -'■ 

.     .     .     pelta' 


1.— TiHiit  til>iM'  of  till'  mall',  "ii  tli'-  inm  r  sidr  towanl  ilic  ciiil,  wnupwliiit  (•(.ncavc, 
the  oiitfi- iui^ili' I>ri)iliM('(l  inlii  a  lapi>ftlikc  |ir<MCMH;  yclldw  «|i(ils  ««ii  I  ho 
nhdoiijcii  in  lioili  scxis  vi'iy  larg«',  Icaviii;,' only  a  median  Htriiic  and  ciosh- 

bandNi  liind  finioia  and  tihiiv  yellow quadratu* 

Front    tiliiie  of  the  nialr  ;;t'iilly  and  evenly  coiiNex  «>m   tlie   inner  ttide,   tiie  lip 
on  tlie  outer  Hide  less  piodiieed,  more  angular;  mjioIh  of  alidomen  wm  iller, 

liind    li  UN   (liieliy   lilack 3 

3.— Front  femora  in  the  m;ile  witii  a  row  of  five  to  seven  lon^  bristly  liairs;  second 
alidoniinal  segment  with  lar^fe,  the  tilth  with  nmall  yellow  sjiots     .     .     . 

chcetopodus 

Front  femora  w.thont  mh'Ii  Urislles  ;  second  Mej;nient  of  the  alidomen  in  hot h  sexen 

witli  a  small  mnsided  spot  on  eaeli  side,  lifMi  segment  in  the  nuilo  without 

yellow hyperboreus 

For  other  spcfies,  see  deseription. 

PlatychiruB  quadiatus.     ( Plate  111,  li;;s,  10,  lUa.) 

Wiiru  ijinidi-dtu  Say,  J.  Aead.  I'hil.,  iii,  !•(',  4,  Compl.  VVr.,  ii,  79. 
Siirpliii'^  (luutlrahiH  Wiedeinanu,  Auhh.  Zw.  Ins.,  ii,  lH.'j,  'i'i. 
Si/rjiliKs  I'liKCdHiiiitntiH  Mai'i|narl,  Dipt.  I",xol.,  .V  Snppl.,  {K>,  58. 
I'ldlilcliiniK  iiii(idrttlii'<  O.-ti'ii  .'^aeken,  Cat.  Dipt.,  I'Jvi. 

Mnliltat. — Eastern,  Middle  and  Pacilie  States! 

^,9.  Length.  7""".  I'aee  deep  shiniu};  yreen,  thi(!kl,v  covered  with 
yollowisli  pollen;  in  jdolile  a  little  reeedimr,  tubercle  very  little  ])romi- 
nent.  Antenna' brownish  blaek.  Frontal  triangle  .yellowisii  polliuose 
and  with  black  pile;  front  in  female  shinin;,',  with  a  simiewh, it  coppery 
reflection,  pollinosc  on  the  sides  below,  and  dilated  inwardly  near  the 
middle.  Tiioi.i.\  deep  .sliininf;'  metallic  ;:i'een  ;  ])lcnra'  with  wliitisii  or 
grayisli  pollen  Sciitellmn  lik<'  the  thoracic  dorsum.  Abd(»men  with 
three  laroe  pairs  of  quadrate,  oranjic  yellow  spots,  leaving-  a  louoitudi- 
nal  stripe  and  three  cross-bands  shining  black,  which  in  some  speci- 
mens  are  slender,  brown,  or  even  obsolete;  in  the  female  the  black 
cross-bands  are  often  dilated  in  the  middle,  and  narrowed  on  tin;  sides; 
the  fifth  segment  with  a  median  blat-k  stripe,  dilated  behind,  or  wholly 
orange  colored ;  sixth  segment  in  female  small,  reddish  yellow  ;  hyjw- 
pygium  sliining  greetiish  black.  Legs  reddish  yellow;  the  flrst  and 
last  two  Joints  of  the  hind  tarsi  black  ;  the  hind  tibiic  sometimes  with 
one  or  tAvo  blackish  rings.  In  the  male  the  front  tibiie  are  gradually  di- 
lated, convex  on  the  outer  border  below,  gently  eom^ave  on  the  inner 
side,  the  outer  angle  below  produced  downward  ;  tarsi  dilated,  grad- 
ually narrowed  from  base  to  tip;  the  hind  metatarsi  in  the  male  also 
thickened.     Wings  with  a  brownish  tinge  across  the  mid<lle. 

Numerous  specimens  from  New  England,  Jvansas,  California,  &c. 

Platychirus  hyperboreus.     (I'latc  III,  fij?.  12.) 

Si/rjihit-i  hi/j)crh(irctiH  .Staeger,  (iroeiil.  Aiitl.,  'M2,  liO. 
•S'dcd  hijiKThorca  Holmgren,  Ins.  Nordgro'iil.,  1(H). 
I'ldfiichdnis  In/perhoreiis  Staej^er,  KriiJ.  Tijds..  N.  RakUc,  i,  346. 

Bahitat.—Grvonhun]  (Stiiger),  New  York  (U.  S.),  Colorado,  Tennsyl- 
vania.  White  ^Mountains! 

8.  Length,  S  to  9"'."'.  Deep  shining  metallic  green.  Face  rather  thickly 
covered  with  yellowish  gray  pollen,  leaving  only  the  tubercle  and  the 


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58 


BULLETIN  31,  UNITED  STATES  NATIONAL  MUSEUM. 


;  i 


"    , 


cheeks  in  front  more  shining.  Face  somewhat  receding  in  profllo,  tti 
tubercle  inconspicuous;  cheeks  convex  below.  Antennae  brownJN 
black.  Frontal  triangle  poliinose,  with  black  pile.  Abdomen  opaqi 
black;  the  first  and  flftli  segments  and  the  hypopygium  shining  grcc: 
ish  black;  second  segment  with  a  small  rounded  spot  on  each  side ;  tiiii 
segment  with  a  large  quadrate  spot  in  front  reaching  to  a  little  beyoii 
tiie  middU';  fourtli  segment  similar,  tlie  spots  scarcely  reaching  bcyon 
the  middk^;  fifth  segment  sliining,  wholly  without  yellow.  Front  It- 
yellow,  tlie  tibiae  gradually  and  nearly  evenly  dilated  from  the  ba.st't 
the  ti]»,  the  external  angle  below  not  produced,  metatarsi  moderat( 
dilated,  thence  gradually  narrowed  to  tlie  tip;  mi<l<lle  legs  yelio' 
blackish  toward  the  base;  hind  legs  black,  the  tip  of  femora,  the  bii^ 
and  tij)  of  tibite,  tip  of  metatarsi  and  tfie  second  and  thirds  joints,  vc 
low.     Wings  nearly  hyaline;  stigma  dilut»'ly  yellow. 

9  .  Like  the  male  but  the  abdominal  spots  smaller,  sometimes  wai; 
ing  on  the  second  segment,  the  fifth  segment  also  with  a  pair  of  sp<)t> 
the  legs  with  less  black,  and  th  j  fore  legs  not  dih^ted.  The  front  in 
middle  leg.",  are  wholly  yellow,  and  the  black  on  the  hind  legscontiin 
to  a  ring  on  the  femora  and  tibijBand  with  the  metatarsi  blackened. 

Six  males  and  one  female  from  Colorado,  four  fcMnales  and  one  nm 
from  the  White  Mcmntains,  New  Hampshire,  July  2o-.'i(),  and  one  feiii,i 
from  Pennsylvajiia  (Keen). 

This  species  is  closely  allied  to  P.  vha'topodus,  but  differs  in  the  iim 
in  the  front  femora  not  having  the  row  of  conspicuous  bristly  blm 
hairs  on  the  outer  side  and  in  the  spots  on  the  fifth  abdominal  seguif; 
being  wanting ;  in  both  sexes  by  the  spot  on  the  second  segment  heii 
small,  rounded,  or  snbtriangular. 

FlatychiruB  peltatuB.     (Plate  III,  tigs.  11,  lla.) 

Sjifithux  pellaiHH  Meigeu,  Syst.  Btischr.,  iii,K:i4. 

Sco'va  alhhnana  Fallen,  Syrph.,  46,  19. 

Scaiva  peliata  Zettcrstedt,  Dipt.  Scand.,  ii,  747;  viii,  414.'>,  50. 

I'latjichciriis peltatiin  Stager,  Kroj.  Tijdsclir.,  iv,  S'JO;  Schinor,  Dipt.  Austr.,  i,  'H 

Habitat. — Northern  Europe,  White  Mountains,  Pennsylvania,  >V 
York!,  Sitka  (Lw.). 

^  ,  9  .  Length,  8  to  9™™.  Metallic  shining  green.  Antennae  blai;ki« 
brown,  the  third  joint  somewhat  lighter  or  yellowish  below.  Fa 
thickly  covered  with  yellowish  dust,  leaving  the  tubercle  and  cliefi 
in  front  more  shining ;  in  i)rofile,  concave  below  the  anteniuie,  witli 
prominent  tubercle  and  a  smaller  one  below  it,  near  the  oral  margi 
Frontal  triangle  bronze  colored,  but  little  shining,  the  pile  black ;  fro; 
with  a  slight  coppery  or  bronze  reflection;  dusted  on  the  sides  belo 
dilated  in  the  middle  so  that  there  is  only  a  narrow  shining  space  1> 
tween  the  two.  Thorax  bright,  shining,  metallic  green.  Abdomen  ; 
the  male  opaque  black,  shining  metallic  green  on  the  flr.st,  tip  of  fonii 
the  fifth,  and  the  sixth  segments ;  in  the  female  wholly  moderately  s\i 
ing.    Second  segment  with  a  moderately  large  yellow  spot  on  each  .-^ii; 


third  ii 

tlMfei 

on  the 

wUch 

yellow 

rtor  p: 

thiekl.v 

eratelx 

dik^tec 

joint  ii 

wliiti.sl 

at  the 

vated, 

yellow, 

again, 

brown 

the  ba 

sliglitl; 

ened; 

cept  tlj 

ments 

ish. 

Two 
ftom  til 

Also. 

Plalych 

Huhh 

i.  I 

ered  wi 
Antenii 
poUino.^ 
talhcg 
flrat  se< 
trimgn 
ment  in 
narrow 
th$|  th 
wiaeue( 

fol^h  i 
flf^  se 
gri^ni.s 
pypuni 
a  small 
broad  I 
liind  ta 


USEUM. 


SYNOPSIS    or   NORTH    AMERICAN    SYRPHID^. 


59 


ig  in  profile,  ft  tk^^i  imj  fourth  with  hirger  quaclrate spots,  sit  iiated  on  the  front  part ;  in 
ennse  browni,  ^^  female  these  spots,  except  the  first  pair,  are  siualler,  and  in  addition, 
bdonien  opaqr  oi^tho  fifth  seguient,  there  is  r  small,  oval  spot  on  each  side  in  fn'ont, 
11  shining  grcc;  ^ych  is  scarcely  apparent  In  tlie  male.  In  the  male  the  front  femora  are 
each  side ;  tliii  yeOowish,  with  more  or  less  black  toward  the  base,  and  ori  their  poste- 
)  a  little  be.voii  ^f^  pj^rt  for  nearly  their  whole  length  there  is  a  row  of  rather  long, 
■eaching  beyon  tygkly  set,  black  pile;  the  tibiui  yellowish,  slender,  suddenly  and  mod- 
)w.  Front  It-;  eilitely  dilated  at  the  tip;  the  metatarsi  elongated  and  extraordinarily 
rom  the  basei  ail|ted,  produced  into  an  acute  angle  on  the  inner  distal  corner;  second 
arsi  njoderatt  joi^t  .,  little  dilated,  the  remaining  joints  not  at  all;  the  first  two  joints 
lUe  legs  yelld-  ^j|tish,  the  remainder  reddish  yellow.  Middle  femora  of  the  male  bla(!k 
femora,  the  biivaj||j(.  i)ase,  otherwise  yellow;  below,  near  the  mid«lle,  somewhat  exea- 
liirds  joints,  \>  vated,  and  for  a  short  distance  with  a  row  of  short  bristles;  the  tibiai 
yellow,  on  the  inner  sid«',  just  before  the  middle,  suddenly  narrowed,  and 
sometimes  wai;  again,  a  little  less  suddenly,  widened  before  the  tip  ;  hind  legs  blackish 
a  pair  of  spot-  brown  with  yellow  knees,  their  metatarsi  thickened,  especially  toward 
The  front  ni  the  base.  In  the  female  the  legs  are  simple,  only  the  middle  tibiae 
nd  legs  confim  slightly  narrowed  on  the  inner  side  and  the  hind  metatarsi  a  little  thick- 
si  blackened,  ened;  the  first  two  pairs  of  legs  nearly  wholly  yellow,  the  hind  pair,  ex- 
es and  one  hm  cept  tlie  base  and  knee,  blackish  brown;  the  spots  on  the  abdominal  seg 
),  and  one  feiiia  ments  are  also  some  what  snuiUer.  Wings  hyaline,  stigma  light  yellow- 
ish. 
tiers  in  the  iim  Two  spocimens  from  lIollan<l,  and  one  male  and  twenty-five  females 
•us  bristly  blm  flfom  the  White  Mountains,  New  Hampshire  (July  25-30). 
iomiiuil  seguif:     Also,  several  males  ami  le.  ales  fro.n  Pennsylvania  (Mr.  E.  Keen). 

d  segment  beii 

PlatychiruB  chaetopodus,  n.  sp. 

Suhitat. — Washington  Territory !. 

i .  Length,  8""".  Deep  shining  metallic  green.  Face  thickly  cov- 
ered with  yellowish  dust,  a  small  spot  on  the  tubercle  bare  and  shining. 
Antenna' brownish  black.  Frontal  triangle  more  greenish,  less  thickly 
Dipt  Austr  i, '2j  PoHInose,  with  black  pile.  Thorax  and  scutellum  bright  shining  me- 
nsvlvania  V  '^^^^  green.  Abdomen  opacpie  black,  w  ith  four  pairs  of  yellow  spots ; 
'  flrtt  segment  shining  greenish  metallic;  second  segment  with  two  large 
ntennae  blacki-  ^'^^^S"''"'  spots,  leaving  the  black  nearly  the  whole  width  of  the  seg- 
h  below  Fii  *°***^  '"  ^''ont  and  narrowed  behind,  on  the  posterior  border  a  rather 
>rcle  and  chef  "*****"  black  cross-band;  third  and  fourth  segments  similar,  except 
antenna'  with  *^*^  ^'"'  ^l'"*^'**  "''^  more  nearly  (juadrilateral,  the  black  only  a  little 
Hie  oral  imr"i  ^^®''^'*^  '"  front,  and  the  posterior  bands  a  little  broader,  so  that  in  the 
nile  blacl"  fro'^**'"'''  •'^♦if?'"*'"t  it  occupies  aboutone-thirdof  the  width  of  the  segment; 
the  sides  belov *^  segment  with  two  yellow  spots,  leaving  only  a  posterior  shining 
hining  space  l**^"'"^^'  ^''•^^''  triangle,  extending  narrowly  to  the  front  margin;  hypo- 
Abdomen  Pyt^"'"  '^'''"ing  metallic  green.  Legs  yellow;  the  middle  femora  with 
[•St  til)  of  fomi  ***"''  blackish  spot  toward  the  base,  hind  femora  and  tibiai  with  a 
moderatelv  sIl^'^^^  black  ring,  hind  metatarsi,  except  their  tip  and  last  two  joints  of 
)ot  on  each  sin  '^^'^  tarsi,  black ;  front  t^niora  on  their  hind  border  with  a  row  of  four 


0. 


BULLETIN   31,    UNITED    STATES   NATIONAL   Ml'SEUM. 


§.    >i 


I,  i 


A! 


or  five  long  bristly  blacjk  hairs,  front  tibiae  gradusxlly  dilated,  tlie  ini:i 
border  more  sinuate  than  in  P.  hyperboreun,  tlie  outer  angle  at  tlict 
moderately  acute,  their  metatarsi  moderately  dilated,  thence  gradual 
narrowed  to  the  tip  of  tarsi ;  hind  metatarsi  thickened.  Wings  fain; 
brownish  tinged. 

Two  specimens,  Washington  Territory.  This  species  will  be  dist 
gnished  from  P.  hyperborem,  to  which  it  is  most  nearly  allied,  by  ti 
large  spot  on  the  second  abdominal  segment,  by  the  presence  in  t; 
male  o  '  rots  on  the  fifth  segment,  by  the  bristles  on  the  front  feiin 
of  the  male,  by  the  external  angle  of  the  front  tibiae  not  being  ii; 
duce<l  lappet-like.  From  P.peltatus,  the  front  legs  in  the  male  andt: 
facial  profile  will  at  once  distinguish  it. 

Platychinis  ciliatus. 

Platiichcirua  ciliatua  Bigot,  Ar\y\a\efi  Soc.  Ent.  Fr.,  1884,74. 

IlabHat. — California  (Bigot),  Colorado! 

<?.  Length,  8'""'.  Face  nearly  uniformly  gray  pollinose.  Third  jo 
of  antennae  twice  as  long  as  wide,  partly  reddish.  Dorsum  of  tlior 
and  scutellum  shining  brassy  black.  Abdomen  contracted  in  the  midd 
opaque  black ;  the  first  segment,  the  sides  of  the  second,  the  fiftli  y 
meiit,  and  the  hypopygium,  sliining  metallic.  Second  segment  on; 
sides  with  a  small  spot,  third  and  fourth  in  front  with  a  larger,  ohlif 
lateral  spot,  yellow.  Legs  yellow  ;  the  front  and  niiddle  femora  in  p 
the  hind  pair  chiefly,  black  ;  front  femora  on  the  outer  side  with  a  rati 
dense  and  long  row  of  black  pile;  front  tibiae  with  a  tuft  of  black  | 
without  beyond  the  middle,  considerably  dilated  on  last  fourth,  8(jnai 
truncate  at  the  tip ;  front  metatarsi  much  dilated,  squarely  truner 
second  joint  very  short  and  transversely  dilated  to  the  full  width  of 
metatarsus,  the  next  two  Joints  successively  less  dilated  ;  middle  ti 
arcuate  on  outer  half;  hind  metatarsi  thickened  and  elongate.  AVi[ 
hyaline. 

9  .  Anteunjb  black.  Abdomen  with  a  pair  of  quadrate  spots  on 
third  and  fourth  segments,  the  spots  on  the  second  small  or  obsoV 
Femora  black,  except  the  tip;  intermediate,  and  especially  the  li 
tibia,',  brown  in  the  middle;  hind  metatarsi  elongate. 

Three  8i)ecimens,  Colorado  (Naiioual  Museum,  Professor  Riley's  i 
lection).  The  color  of  the  legs  probably  varies  somewhat.  This  spw 
is  very  probably  the  one  described  as  P.  eilialus  by  Bigot,  but  as 
author  omits  the  most  distinctive  characters  (the  structure  of  thtM 
legs),  and  as  his  types  were  from  California,  it  will  be  well  to  reprodi 
his  description. 

r.  ciliatus.  S.  Long.  8"'"'.  mger.  Antennis.  neyinento  3"  tiubthsj" 
obscure  notato  ;  facie  cinervo  pruinom  ;  thornce  scutelhq>te  nitidis,  V 
rillosin;  calyptris  et  halteribus  cinereis,  cUirii  niffra;  abdomine  m 
opaco,  albido  lonye  villosulo,  maculin  utrinque  ttihiis  triyonis,  cinei 
seymento  5"  nitido;  femoribus  anticis,  .subfiis,  lonye  niyro  ri Hosts,  pc<h 
anticis  intermediisque  testaceis,  femoribus  et  tibiis  inter mediis  late  in 


L,-luco 


irSEUM. 

ilated,  tlio  itim 
'  jvng:le  at  tlicr 
thence  gruflun; 
.     Wiugs  faint 

es  will  be  (list: 
•ly  allied,  by  tt 
1  presence  in  ti 
the  front  feino: 
e  not  being  pi 
the  male  and  ti 


SYNOPSIS    OF    NORTH    AMLRICAN    SYRPHID.E. 


ei 


lose.  Third  jo 
)orsuni  of  tlior 
ted  in  the  niidd 
)nd,  the  fifth  s* 
I  segment  oiii 

a  larger,  oblif; 
le  femora  in  ]);v 
side  with  a  rati 
tnft  of  black  i 
t  fourth,  sqnar. 
juarely  truiicr 

full  width  oft 
ed  ;  middle  ti' 

Ion  gate.    ^Vi[ 


mlatis,  anficis,  lati:i,  tcstaveis,  utrinque  niijro  manjinatis,  tarsia  antivh, 
^t»,  tentace'iH^  basi  nlgro  paritir  miir<jlnaiiit,  pedihus  poKticis  niyris;  alix 
^lid('  c'  ..ris,  macvM  ftifimaticali  pdlliilc  fuscu. 

^jflS^oir.     Anteinies,  li"  sj'gmcnt  avcc  une  macule  fauve  en  dessous  ;  face 
albez  li'isante,  ii  relicts  gris;  bords  dcs  orbites  postcneurs  j\  «luvet 

Snc  ;  thorax,  »''<!uss()ii,  Inisants,  d'un  bronzA'  obscur  avec  dc  longs 
Is  clairsemcs  brunatrcs,  tlancs  a  duvet  blanchatre;  cuillerons  et 
anciers  grisatrcs,  niassue  noire;  abdomen  d'un  iu)ir  opaque  avec  de 
gs  })()ils  clairseim'S  blancliatres  vers  la  base,  ler  et  dernier  segments 
tUsants,  2",  o''  et  4''  avec,  <le  chaque  cote,  une  macule  trigonale  grise; 

fsscs  anterieures  te  stacees  avec  un  large  anneau  noir,  et,  en  dcssoiis, 
longs  cils  noirs,  tibias  testaces,  ('•largis,  hordes  de  noir,  tarscs  et 
naiitatarses  anterieurs,  fort  elargis,  testact's,  les  derniers  bordt's  dc  noir, 
pjMs  intevmediaires  avec  les  cuisses  ))resqu«'  totalement  noires,  dcs  ]»oils 
cluirscnies  blancliatres  aux  tibias,  uu  large  anneau,  tarses  a  rextr«?inite, 
n^s,  pieds  jmsterieurs  entifjrenuMit  noirs,  avec  les  cuisses  munies  de 
pMls  blaucs  dairsemes  ;  ailes  un  pen  grisatrcs,  stignuite  d'un  jauniitre 
©bscur.  Abdomen  etroit,  CalilVu'nie. — 1  special. 
flic  l<'gs  of  Uigot's  sjiecimen  are  more  liiark,  ami  the  abdominal  spots 
rhaps  lighter  colored;  otherwise  it  seems  to  be  similar. 

tychhus  Naso  \Valk«a',  List,  rtc,  iii,  '87  (Si/rpliiin). — linds.  15.  'ICii. 
tycliiius  Pacilus  Walkt-r,  Dipt.  .Sauiulers,  •J4li  (Siiriihii^). 

I* These  are  b(»th    riati/chh'i ;   whether   they  difter   from   P.  jji'ltattis 

tiuadratus,  1  am  unable  to  tell,  as  I  had  no  speeimeiis  for  compari- 

when  I  saw  the  types  in  the  Mritish  museum."— Osten  Sacken,  Cat. 

)t.,  p.  244,  note  201.    These  si)ecies  can  hardly  be  determined  from 

ilker's  descriptions,  and  it  does  not  seem  worth  while  to  reproduce 

tm. 


rate  spots  on 
unall  or  obsolt 
lecially  the  li 

fessor  Riley's  > 
mt.  This  spi( 
Bigot,  but  as 
icture  of  the  t 
well  to  rei)ro(h 

nto  3"  Hubthsp 
oq'ie  nitidis,  J'l 
:  ahdomine  n' 
triyonisy  vina 
o  rillosis,  pedi 
rmediis  lati  in 


LEUCOZONA. 

Leucozona  Schiner,  Wiou.  Eut.  MouatBclir.,  vi,  214,  18<50. 
lather  large,  thickly  pilose  8i>ecies  ;  black,  with  a  broad  yellow  baud 
afc  the  base  of  the  abdomen.  Head  hemisi)erical,  somewhat  broader 
tbfn  the  thorax.  Antenme  porrect,  short,  third  joint  oval ;  arista  basal. 
Face  in  both  sexes  broad,  yellow,  with  black  cheeks  and  median 
ipe;  grayish  pollinose,  pilose;  in  profile  perpendicular,  somewhat 
►tuberaut  below,  produced  considerably  downwanls  below  the  eyes, 
u'culate.  Eyes  pilose,  contiguous  in  the  male.  Thorax  scarcely 
loiger  than  broad.  Scutellutu  reddish  yellow,  translucent.  Abdomen 
efi|ptical,  depressed,  broadest  beyond  the  middle,  not  more  than  twice 
ai  long  as  the  thorax.  Wings  with  open  marginal  cell,  third  loiigitudi- 
veiii  very  gently  curved,  small  cross  vein  near  base  of  discal  cell, 
ftposteriorcell  <!losed  some  distance  before  the  costa.  Type  of  genus, 
\ucor\nn  (Linn6). 


0 


02 


BULLETIN    31,    UNITED    STATES   NATIONAL  MUSEUM. 


U 


l\ 


»  W 


\. 


Leucozona  lucorum.     (Plate  III,  figs.  O.Ga.) 

MuHCAi  lucorum  Liiin6,  Fauna  Siiec,  180l{,  ITOL 

Conopa  pruvdnctiiH  Scopoli,  Kiitoiii.  Ciirii.,  !I(I8. 

Syrphus  lucorum  Fabriciiis,  Spec.  Iiib.,  ii,  4'iG,  25  ;  Eutoin.  Syst.,  iv,  291,  46;  .V 

gen,  Syst.  BoHchr.,  iii,  313,  58  ;  pi.  xxx,  lig.  27;  Mucqnurt,  Hist.  Nat.  Dip; 

.')37,  H. 
EriaiaHH  lucorum  FaUrioiuH,  Antl.  '241,37;   Fallen,  Syrpli.,  50,   1;  ZetteiNii 

Di]>t.  Stand.,  ii,77H,  and  viii,  31(i(>,  1. 
Cheiloxia  lucorum  Walker,  In.s.  Urit.,  i,  ^f^l,  1 ;  Curtis,  IJrit.  Ent.,  753. 
l.rncozoud  lucorum  Scliiner,  Wi«!n.  Ent.  Moiiatsclii'.,  vi,  '214  ;  Fauna  Aiistr.,  i,: 

Hnhitaf. — Wa.sliiiigt()ii  Territory!  (JtiHiula  (O.  S.),  Nortlicrn  and  C 
tral  Eiiropt'. 

(J  ,  S  .  Loiigtli,  12""".  Ant^eiiiia}  black,  third  Joint  oval;  arista  bl.i 
Faw  gently  concave  l)elo\v  the  antenna;,  tlu;  tubercle  larf^e,  obtii 


by  Ro 
arftt.;  ] 
all  the 
pabeH( 

H.),  ai 
or  Don 
sabord 
oiithe 
nMrely 
aii4  dif 
0[^ior 
«Tli 


nearly  as  low  <lo\vn  as  the  lower  bonier  of  the  eyes ;  color  conjH'alcd  noflmi' 
the  sides  beneath  very  dense  white  pollen,  an<l  yellowish  white  pile,  i  jntiodi' 
middle  jiart  and  the  cheeks  brifjht  shininj;'  bine  blaek,  frontal  triiin.  «fApp 
less  dusted.  ''  Front  in  female  yellowish  anteriorly,  gradually  bee.  «^-»j,^- 
iujj:  darker  behind."  Thorax  opa<jue  black,  thickly  coveicd  with  r.  ^-i.^,^ 
dish  yellow  pile,  beneath  which  the  dark  {•reenish  brown  ]>ollen  loiiv  «#  *^Jp^ 
three  slender  black  stripes.  Pile  on  the  ])lenra'  white,  on  theijcntelli  K«|fcKo 
bushy  yellow  or  oran<.'e.  Abdomen  black,  shining',  the  second  sejiiin  «  rut..] 
either  wholly  li{,rht  yellow  or  wholly  snb-opa(iue  bluish  p;ray,  or  li:  ^j  j^^ 
yellow  in  the  middle  part  and  bluish  jjray  on  the  sides,  with  a  slcm  «^u^  < 
black  stripe  on  the  middle  ot  reacliiu};  the  posterior  margin;  pile  leu  gggmf.  * 
abundant,  yellow  and  black.  Legs  black;  tip  of  fenumi  and  base  o|»(^p,„ 
tibite  whitish  yellow,  sometimes  almost  wl.olly  yellow.  Wings  iiyli  ljeiicoz( 
with  a  bljickish  brown  si)ot,  reatdiing  from  the  ba.se  of  third  poster  ajj^gni,. 
cell  to  the  stigma  ;  stigma  darker.  me  in  t 

Two  S  specimens,  Washington  Territory,  Colorado.  jimi;  j^ 

It  is  t 

CATABOMBA.  of  his . 

tumid  t 

Laniophlicus  Tiondiin'i,  Prodninie,  ii    137,  1857  (ex  parte).  i-   iqo,. 

Caiahomha  Osten  Sackeii,  W<st.  Diiit.,  3'>.5,  1877.  '         '' 

except 
IJather  large  species,  closely  resembling  in  appearance  find  ^ti'"*^t[^  -  .  . 

the  genns  Syrphus,  except  that  in  the  male  the  eyes  have  •"' 'ii'^''' OatA    < 

etdarged  facets  above,  the  front  in  both  sexes  remarkably  convex,  ii,,^.      , 

*  '  naiiie,  h 

the  hypopygiuin  of  the  male  is  very  small,  concealed  entirely  '><^''i''''|.«|wi .  ,. 

the  fifth  segment  of  the  abdomen.    Type  of  genus,  C.pyrnslri  Linii' 

In  resxjouse  to  a  I'eciuest  in  regard  to  the  claims  of  Lasiophticus  Eon  CaUbou 

for  priority  over  Catabomba,  as  put  forward  by  Uigot,  Daron  Us:  j*^" 

iSacken  has  kindly  given  me  his  views  on  the  retention  of  Cataboiiii 

Mhich  1  take  the  liberty  of  reproducing  here  nearly  entire. 

'•The  genus  Lasiophticus  was  characterized  by  Ivondani  (Pmd. 

137),  thus:  'It  shares  the  characters  of  Syrphus  and  Platychirus. ! 

ditlers  from  the  former  in  not  having  dilated  front  tibia?  and  tarsi,  ti' 

both  by  more  or  less  pubesceut  eyes.'    Eleven  species  were  eiiumoraii 


Mil 
Sijr 


Siir 
Si/r 


\    i 


[l\ 


IU8EUM. 


SYNOPSIS   OP   NORTH   AMERICAN    SYRPHID.E. 


63 


St.,  iv,  291,  46;.\| 


lljf  Roudani  as  l)t'Jon{,'ing  to  Lasiophticns,  iiKjluding  the  so  called  topi- 
4tliuj  M.  (my  S.  torvux),  glaticiua  F.,pi/rasiri  Liu.,  etc.  In  other  words, 
•if  the  European  Syrplius  (in  the  restricted  setse  ofSchiner)  that  have 


T,   /  T;  r.'     lrttt)esceiit  eyes  are  Lasiophticns  Kond.  (see  Schiner,  i,  301). 
,  Ilist.  Nat.  Dipt  *^'T^  •'  .  .'  r,        ,  ,i»  T^ 

;<*>.'ow  I  have  shown  in  my  paper  on  Syrphus  (Froc.  Boi 


Bost.  Soc,  N. 

,  and,  before  me,  Mr.  Malm  has  <lone  tlie  same,  that  the  pubescence 

onpnbescenct!  of  the  eyes  in  Syrphus  is  a  character  of  altogether 

rdinate  value;  I  mean  to  say  that  if  we  introduce  a  subdivision 

'the  basis  of  this  chara(!ter,  most  <'vidently  allied  species,  perhaps 

p-ely  seasonal  varieties,  like  ;S'.  rihenU  and  S.  torvtin,  are  torn  asunder, 

dissimilar  forms  like  ji>»/ms/n  and  </^a«ctw«  thrown  together.     In  my 

ion,  therefore,  the  genus  Lasiophticns  must  be  given  up. 

The  question  whether  Catabomba  is  to  be  maintained  or  not  has 

ing  to  do  with  that  of  the  validity  of  Lasiophticns.    Catabomba  was 

duced  by  me  on  the  ground  of  the  peculiar  stru<!ture  of  the  facets 

e  eyes  in  the  male,  of  front  in  both  sexes,  atid  of  the  male  genitals.    S. 

tri,  S.  selenlticus,  an<l  jirobably  also  8.  gemeUarii  Kond.  [S.  melan- 

a  (Macq.)  v.  d.  Wulp,  also]  i)artake  of  these  characters.    The  eyes 

ese  species  are  all  i)ubescent,  so  far  as  I  know  ;  but  then  a  Cata- 

ba  with  glabrous  eyes  may  be  discovered  and  will  be  nevertheless 

tabomba ;  it  could  not  be  a  Lasiophti<'Us  Kond. 

believe,  therefore,  it  would  be  exi)edient  at  present  to  retain  the 

s  Syrphus  in  the  sense  of  Schiner,  and  to  drop  Lasiophticns.     It 

s  to  me  that  we  render  Syrphus  in  this  restricted  sense  more  hom- 

lora  and  base  ogjgieous  if  we  separate  Catabomba  from  it,  Just  sw  Schiner  separated 

^\  ings  hyiili  ijencozona  and  other  small  genera.     General  habit  and  coloring  of  Cat- 

f  third  poster  almlhiba,  as  well  as  its  remarkable  geographical  distribution,  eontirm 

me  in  the  belief  that  the  species  are  subject  to  some  peculiar  law,  and 

that  it  is  only  right  to  isolate  them  in  our  systematic  arrangement." 

It  is  true  that  Kondani  used  (S\  pyrastri  as  one  of  the  typical  8i)ecies 
of  his  genus,  and  also  pointed  out  one  of  its  special  characters — the 
tanrid  front  in  the  mah',  in  his  tabular  arrangement  of  the  species  (Prod, 
ii,  188j;  but  for  all  that  his  geinis  can  not  and  never  would  be  accepted, 
except  by  the  use  of  characters  pointed  out  by  Osten  Sacken  in  his 
hce  and  «tructi^^^jj  l^^ii  ^^^.  (ij,tabomba.     It  perhaps  might  have  been  better  had  Karon 
have  an  iW'OBteu  Sac^ken  used  the  name  Lasiophticns  instead  of  Catabomba;  the 
a  n,>  con  t- "naijie,  however,  in  itself  might  become  strongly  objectionable.     Cer* 


,50,  1  ;  ZcttciM. 

■jUt.,  75:5. 
i-'tuma  Anstr.,  i,. 

irthern  and  C 


L-al;  arista  bl^ 
le  large,  obtii> 
jlor  concealed 
sh  white  pile,  i  j, 
,  frontal  triiiii. 
gradually  Ixci 
•overed  witli  it 
)wn  i)ollen  Iciiv  ^^ 
on  thejjc^uti' 
I'  second  seg 
s!i  gray,  or 
;>s,  with  a  sleiit 
largin;  pile  Idi 


entirely  beiu; 


tailily  the  pilosity  of  the  eyes  is  not  a  generic  character. 


piprfntri  Liiiii 

siophticus  K()bCat«bomba  pyrastri 


(I'liito  IV,  li-s.  1,1«.) 


;ot,  Daron  U.< 
m  of  Cataboiii 
it  ire. 

Dudani  (Prod. 

Platychirus,  I' 
»  and  tarsi,  li'i 
were  euumerati 


MuKca  puraHtri  I.iiiinS,  Fauiiii  Slice. ,  t^lT  ;  .Scn]>oli,  Entom.Carn.,  931 ;  Schrank, 

Eiiiiiii.  Ins.  AiKstr  ,  417,  ;t()7. 
Mii»ca  roHfv  Oogeer,  Ins.  vi,  (!;  ]il.  vi,  li<rs.  14-'2l. 

Surplnix  pjimxtri  Kaliriciiis,  Sjx'c.  Ins.  ii,  A'.V-i,  .').S;  Entoiii.  Syst.,  iv,  305,  102;  Mei- 
fI»Mi.  Syst.  Uesclir.,  lii,  :W;i,  44  ;  MiU(|niirt,  Hist.  Nat.  Dipt.,  i,  536,  3 ;  Schiner, 
Vcrli.  Z.  Ii.  GcH.  vii,  338 ;  Fauna  Au.str.,  i,  301. 
'iSiirj'liioi  iiiiicolor  Curtis,  Brit.  Ent.,  509,  var. 
\Siirj)lius  trunKj'iiijuii  Fabricius,  Eutoin.  Syst.,  iv,  306, 104. 


64 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


i  I 


i'l  ill 


'i 


I     1 


in  til 

trinii^ 
ootic:i 

'fifth  s 

abdoii 

getlie 

ons.vn 

vamt 

IhA  ail 


Main 


ScoBva  piiruslti  Fiibriciuh,  Autl.,  i241>,  ;};  Fallen,  Syrph.,  39,  5:  Zetterstedt,  Ir 

Heanil.,  ii,T()3,aii(l  viii,313'v'. 
Scoira  traimjiiiia  F'iihriciiis.  Antl.,ti50.  .''>. 
Scara  offiiih  Say,  J.  Acad.  IMiil.,  iii,9i),  9;  Coiiipl.,  ii,  81. 
SyrphiiH  a()inin  WifiliMiianii,  Aiix.s.  Z\v.  lut\.,  ii,  117. 2. 
Laniophliciin  pjirunlri  Koiulaiii,  Ann.  d.  Acad.  d.  Anjiir.  Nat.,  ill. 
Culahumhii  piiratitri  OsttMi  Sackcn,  Wi'.stt'i'n  I)ii)t.,  Iltii'i. 

Habitat, — Kiinsas,  Colorsulo,  Wyoniiii};,  Wasliiiigton  Territory,  i 
«gou,  Utah,  Arizona!,  Scandinavia  (Zctt.),  Enjiland  (Walk.),  Genus 
(Schiner),  France,  Al};iers.  CUiili  (Macq.),  Italy  (Kond.),  Canary  Islai 
(Webb  and  IJerthelot). 

(J ,  9  .  Lenjjth,  11  to  12"'"'.  Face  liyht  yellow,  somewhat  bluish  o|  bidenl 
escent,  often  in  dried  .specimens  with  a  reddish  tinjie,  a  brown  s])u\  "®'  ^^^ 
the  tubercle  e.xtending  more  broadly  to  the  oral  margin ;  i)de  abundii  •*"*  *^' 
whitish.  Cheeks  jjreenish  black.  Antenna?  brownish  black,  often:  ^•'Ki 
on  the  under  .sideof  the  first,  second,  and  the  third  joint  nearthe  lia  ^^Wlire 
arista  r«.d.  Front  yellow,  with  a  slender  line  reachinj^'  from  the  antci.  ■*»»•<'*' 
to  the  vertex  or  commissure,  on  each  side  of  which  the  front  is  broii. 
Hubtranslucent  olivaceous,  the  vertex  black  ;  pile  black,  in  the  ii; 
longer  and  n^ore  abundant.  Eyes  of  male  contiguous  for  about  liiil: 
long  a  distance  as  the  length  of  the  frontal  triangle ;  posterior  oii 
whitish  polliiio.se,  and  with  a  fringe  of  white  pile,  longer  below.  Tim:  Odorai 
shining  greenish  black,  the  humeri  and  post-alar  callosities  somt'tiL  0 ,  5 
reddish ;  pile  white,  rather  long  and  abundant.  Scutellum  yellow,  y  cheeks 
translucent  bluish  opalescent,  the  pile  in  large  ])art  blacULsh.  Aluloi,  triwigl 
black,  subopaque,  with  three  jiairs  of  arcuated  whitish  yellow  sjn  corbss 
rather  narrowly  separated  from  each  other,  and  more  so  from  the  lau  pollen  ] 
margins;  the  spots  on  the  third  and  fourth  .segments  arr  obli«]ue,(ln  yellow, 
concave  in  front,  gently  convex  behiml,  inner  ends  rounded,  appios  ant^nii; 
ing  the  front  borders  of  the  segments,  the  outer  ends  broader,  truiic,  tim^s  s 
fourth  and  fifth  segments  narrowly  yellow  behind;  the  first  segintyellowi 
the  hind  margins  of  the  second,  third,  and  fourth,  dilated  in  th<;  niidi  sontelhi 
and  the  remainder  of  the  abdomen,  more  shining,  soineM'hat  metii>8nb0pa( 
Legs  reddish  yellow ;  ba.sal  half  of  front  and  middle  femora  and  the  li:th6||egi 
femora,  except  the  tip,  black;  all  the  tar.si  brown,  sometimes  black: twdlj'el 
the  metatarsi  often  red<lish.  Wings  pure  hyaline,  the  subcostal  each  of 
light  yellowish,  third  vein  with  a  long,  moderately  deep  curvature,  spote ; 

Thirty  specimens.  terior  in 

The  facial  stripe  sometimes  extends  to  above  the  middle  of  the  fase^fineiii 
the  front  of  the  female  has  sometimes  a  distiuct  brownish  cast,  amljbaie  of 
above  the  auteunoe  not  unfrequeutly  brown.  blaok,  e 

Wings  1 

EUPEODES.  ^^•'' 

mer. 

Eupeodea  Onten  Sacken,  West.  Dipt.,  :W8.  1877.  •'ifce  f 

Very  like  ajiecies  of  Syrphus,  Imt  differs  in  the  terminal  abdoniiiin  *S|  otii 
segments.    Head  hemispherical ;  eyes  bare,  extending  the  whole  ve 
cal  diameter,  a  little  convergent  below,  without  area  of  enlarged  fae 


w 


lUSEUM. 

i;  Zotterstedt,  t 


SYNOPSIS    OF    NORTFI    AMElilCAN    .SVKI'HIUit:. 


95 


frontal 


»ii  Territory.  ( 
Walk.),  Genua 
),  Canary  Islai 

svhat  bluish  o] 
a  brown  s])u\ 


in  tlif  malt',  L'onti^MHUs  in  lliis  si-x.  I'ront  a  liltle  uonvcx; 
trianfc'h"  larKo.  Antenna-  short,  third  joint  large  oval.  Face  slightly 
Cone-ivt'  below  the  antenna',  obtusely  lubereulate.  Scutelluni  nuich 
nJsetl,  exposing  the  inetanotum.  Abdonu'n  elliptical  in  the  female,  the 
^ftL  segment  about  half  as  longas  thei>receding;  *  in  the  male  the  sixth 
abdominal  segnicnl  as  long  as  the  two  i»receding  segments  taken  to- 
getber.  but  narrower,  convex,  almost  tubular  when  seen  from  above, 
mnynnnetrical,  the  end  jiointing  slightly  to  the  right;  the  seventh  seg- 
ment bears  the  anal  opening  on  the  under  side  of  the  sixth;  beyond 
thi  anus  there  are  tv.  o  long  slender  subparallel  appendages,  arcuate, 
Irfdenticuiatv  at  the  end,  nearly  as  long  as  the  sixth  segment,  bent  un- 
defe  the  b«  fly  when  at  rest,  and  end)edded  in  a  horny  groove  on  the  under 
•ide  of  the  sixth  segment,  whicli  encroaches  on  the  tifth.     Legs  simple. 


i;  i)ne  abundo  .  ,,  .  ^,     ,  ,.  ,.       , 

'  '     .       ,.  ,  ,  Marginal  cell  ot  the  wing  oi)en ;  small  cross- vein  near  the  base  ot  uiscal 

■   ti  "irthebi  «eU,rectangular;  third  longitudinal  vein  gently  curved.    Type  of  genus, 

Lnuhe  ant.'.',  ■»'  •^^"''''  ^'  ^- 

e  front  is  bim  aofieodeB  volucris.    (Viae,  III  fi-^s.  11,14m.) 

lack,   in   the  Ui         *''   EuiwoiUa  volucrin  Ostfu  Sackcii,  West.  Dipt.,  329. 

<  for  about  hilll  SiirpI  ii8  perpallulns  Bigot,  Aiiiiiili'8  Soc.  Ent.  Fr.,  1884,90. 

•  posterior  oii      Mahitnt. — Washington  Territory,  California,  Nevada,  Utah,  Kansas, 
pr  beh)W.     TIki:  Colorado,  New  Mexi<'o,  Arizona  ! 

losities  sonu'tiL       ^,?.  TA'iigth,  7  to  Kt""".    Eyes  bare.   Face  whitisli  yellow,  with  black 
ellum  vellow,  V  chlJtks  and  a  brow  n  (»r  black  strijjc  over  the  facial  tubercle.     Frontal 
icUish.     Abdoii  triangle  whitish  yellow  with  some  black  ]»ile ;   front  in  female  black, 
tish  yellow  s]*  ccross    the   middle    a    faint   subinterrupted  arcuate   band    of  whitish 
so  from  the  latt  pollen  leaving  a  triangular  shining  space  below,  lower  part  of  the  front 
•■  oblique, <lf(  yellow.  exc'ei»t  a  dark  brown  crescent-shaped  spot  above  the  root  of  the 
uuded  appro;!  antenna'.    Antenna'  brown  or  black.   Thorax  «lark  metallic  green,  some- 
)roader  trniicatimfes  slightly  bluish,  with  very  ])ale  yellowish  pile.     Scntellum  in  male 
le  tirst  sc'iiityeliowisli,  more  or  less  translucent  metallescent,  with  pale  yellow  pile; 
ited  in  tho  niidSOOtellum  in  female  distinctly  yellow  along  the  edge.     Abdomen  black, 
omewhat  nu'tii.siib0paque;  the  first  segtnent,  the  lateral  and  ])osterior  margins  of  all 
mora  and  thokthft'jlogments,  shining,  the  tifth  wholly  shining  ;  on  the  second  segment 
metimes  black. twOs  yellow  oblong  spots,  well  separated  from  the  lateral  margin  ;  on 
the  subcostal  each  of  the  two  following  segments  a  pair  of  longer,  oblong  yellow 
ep curvature,  spots;  those  on  segments  three  and  four  very  slightly  lunate  ;  the  pos- 
terior margins  of  the  tbnrth  and  fifth  segments  narrowly  yellow;  sixth 
iddle  of  the  faSeifinent  shining  black,  sparsely  beset  with  wliiti.sh  pile.     Legs  reddish  ; 
ish  cast,  anil j:^M6  of  femora  black,  a  little  less  extensive  in  the  female;  hind  femora 
blaok,  excejjt  the  tip  ;  hind  tarsi  more  or  less  brown  on  the  upper  side. 
Wings  hyaline;  stignni  yellowish  brown. 

Fifty  specimens.    The  most  common  Syi-phid  on  the  plains  in  sum- 
mer. 


a 


•Tlie  iV'in.ilo  of  SyrpluiH  diversipes  baa  the  fifth  abdominal  segment  longer  than 
rminal  abdonviin  fli  other  Hpecies  of  the  genus, 
g  the  whole  ve      | 
of  enlarged  tae      "I- 


1 


Vt 


•Ifl 


"1     ,11 


u 


i 


:■  i 


if  m 


I!       il 


1 


■   a 


i'l'j- 


I  W. 


'    I 


;t' 


I  I 


^1 


I)    I 


66  BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM, 


SYUFHUS. 

SyrphiiH  tiihriuiiiH,  SyHt.  Kiitoiii.,  I77r». 

Scora  FiiUriciiiM,  Syst.  Anil.,  Iflk't. 

LaHiojihUvHH  Uoiulaiii,  Dipt.  Ittil.,  I'rodr.,  i,  51,  lHr>6. 

.iHcycloHiiriihtiii  HiK»t,  Soc.  Eiit.  Fr.,  IWHJ,  Hull.  Iiiincns.,  No.  fi,  78. 

iHclinruHyrphiiii  HiKot,  Soc.  Eiit.  Fr.,  iHH'i,  l^iil.  Iiiiiifiis.,  \o.  (>,  7H. 

Me<liiiiii  to  larfjesiziMl  .sptMii^'s,  thinly  pilo.sc,  black,  or  iiii'tallic  nth 
or  l)hn',  the  alMlouu'ii  with  yellow  hiiiuls  or  .spots.     Head  hiMiiisplu-iir 
as  broad  or  a  little  broailer  than  the  thorax.     Antenna'  .shorter  1 1 
the  head,  the  thinl  Joint  oval,  a.s  lonj;  or  .stiarcely  lon}j;er  than  the  li; 
two  together;  aristii  ba.sal,  bare.     Face  periHMidicular,  jirodueetl  I 
little  below  the  eyes,  broad,  either  wholly  yellow  or  with  a  black  and 
stripe,  often  with  black  cheeks,  never*  wholly  black;  tubercle  obtii-  10.'— F 
scarcely  at  all  con<!ave  above  it  in  i)rollle,  but  below  always  recedii 
Kyes  bare  or  i)ube.s(!ent,  conti^iiions  in  the  male.     Thorax  larjje,  niodt 
sitely  convex  above,  never  with  <listin(!t  yellow  lateral  stripes.     Scut 
bun  more  or  less  translncent,  yellow,  or  yellowish  ami  blui-sh  or  {^lo 
ish.     Abdomen  oval,  broa<ler  than  the  thoiax,  sometimes  with  him: 
parallel  sides  and  scarcely  wider  than  the  thorax,  more  than  twifi'  M.— A 
long.     Lejjs  slender.    Third  lon^'itndinal  vein  ol'the  wing  nearly  strai, 
or  gently  cnrve<l ;  anterior  cro.ss-vein  near  the  base  of  di.scal  cell; 
terior  outer  angle  of  the  first  jiosterior  cell  always  acute;  marginal  i  13.— .Fr 
broadly  open.  Fc 

The  present  genus  is  one  of  the  most  difllcult  in  the  family  to  sin  14.--T1 
Many  of  the  si)ecies  are  .so  closely  allied  that  otdy  a  large  amoiii 
material  will  determine  tlieii- limits.  Thanks  to  the  careful  study  w 
they  have  received  in  this  country  from  IJaron  Ostcu  Sacken,  the  I 
has  been  much  lessened.  Still,  nuich  remains  to  be  done  by  lociil  >  16.— Sp 
dents  who  shall  nudvo  large  colle(^tions  au<l  study  them  thorou^;! 
while  they  are  in  a  fresh  or  at  least  uninjured  condition.  All  but  tj-^^, 
or  three  of  the  8i)e(!ies  of  our  fauna  now  known  have  been  examined  cii 
me.  Still,  1  have  thought  best  to  reproduce  the  larger  part  of  BailiL-*ip.y 
Ostcu  Sackeu's  descriptions,  with  my  own  notes  or  additions  append       py 

19L-Th 
Cr 
aO.— Th 

Th 
ai.-Th 


Tl 

Tl 

9.— At 
Al 


11.-F 
¥ 


Al 


Tl 

IS.— E,\ 


TABLE  OF  SPECIES. 

1. — Three  principal  yellow  bands  of  abiloiuea  internipted 

Three  principal  bands  entire 

First  cross  band  interrupted ;  the  others  entire 

2. — Eyes  pubeRce'';t  or  pilose 

Eyes  bare 

3. — Abdominal  spots  crescentric  or  arcuate,  sometimes  dissolved  into  spots     ■ 

Abdominal  spots  straight  and  transverse 

4. — The  abdominal  spots  do  not  como  in  contact  with  tha  lateral  margin   .     . 

The  abdominal  spots  reach  quite  to  the  margin,  or,  if  not,  the  spots  are  but 
oblique;  emarginate  in  front,  often  broken  tip  into  smaller  spots     .     . 


'  Syrpliiis  simplex  from  the  West  Indies  is  an  exceptic^. 


Sec 

2a.-.Fa( 

Fac 

2a-Ch( 

Ch. 


[U8EUM. 


SYNOPSIS    OF    XOUTII    AMKRICAN    SVRPHIUiE. 


ef 


§,«_T1„.  XV idth  of  t!u!  front  in  tho  fetiiiilo  ntiavly  equal  to  liiilf  itH  len|;th    .    pauzillua 
Tlu<  wiilth  iiliovo  (list Inctl.  I«HH  thiin  lialfth*' length  («eo  fo<M>i,  var.)      .     .     .     . 

•.— Easi.Tii  Hii.'.i.'H amalopii 

Wi'sti  I'M  siK-cieH Intrudens 

7,_I.'r(iiit  in  fi'inalo  ItriKiil ;  tlie  al)«loiiiinal  HOotH,  as  a  riilo,  do  not  rcacli  tlic  niaryin; 
liiiiil  mctaliiiNi  of  iiialcdiNlinctly  HwolliMi ;  facj-projectln};  lielow  .  conttimaz 

Front  in  frnialc  no!  iiniiHually  1iioa«! 8 

8,— Tliinl  antfinial  jiiiiit  sriicfly  Inn^ccr  tlian  broad ;  fac«<  with  an  iniliNtinct  lilack 
Ntripo;  second  :;,i  it  third  alMloniinal  sjiotH  do  not  rcaili   tin-  lattTa!  niai^in; 

thi«  liiHt  pair  not  IndachT aodalis 

Third  anlinnaj  ,i"lnt  idiiNidfiahly  hmm-r  tiiaii  liroad;  facn  with  a  diHtinct  Itiiiek 

.stripr;  ali<li>niinal  spots  narrow meiitalis 

Third  antinn:.!  Jiiinl  Dval ;  first  pair  of  ahdoniiniil  spots  very  lar;;i';  eyes  thirkly 

pilnsi' velutinUB 

ir,  proilllt'cu  I    g__j^l„l,,i,ij„„l  ^|,„t^  ,,f  tliir,!  ,111(1  fourth  Hi'KnientH  diijtinftly  arcnati'd      .    arcuntus 

,ll  il  black  llHil  Ali<l'>niina!  sjiols  strai^lit,  trausvcrso 10 

tllb'-TcUi  obtll'  10.— l"a<''  niinsinilly  pnijcci  in;;  lulow,  the  distaneii  from  verti'X  to  antenna'  siarc  liy 

•ihVilViS  rec»'tlM  ;iniilir  than  from  ilicntc  to  tip  of  tuhcrfh) geiiiculatuB 

rivVir"-0   inotl.  Fnio  not  nnusiially  project iiiK  Im'Iow 11 

"   '         '  11,— Face  Willi  a  Mackisli  strii>e;  all   tlie  ali'loniinal  spots  of  nearly  ecpial  width 
.  umbellatarum 

'  Face  wholly  withcMil  a  Itlackish  stripe  ;  lirst  ))air  of  abdominal  spots  small,  sei-- 

(ind  ami  third  pairs  lar;;e,  nearly  sr|uart> disjectui 

12.— Aluloiniii  narrow,  with  nearly  parallel  sides  in  tho  male  ;  in  the  fi'unile,  the  \\\'\]\ 

segment  half  as  lon;^  as  the  fourth diversipes 

Ahdoinen  distinctly  oval ;  the  lifth  sej^jnient  in  tho  female  less  than  half  as  Inn;; 


.  f),  78. 

).  (5,  7a. 

)r  metallic  ^vh 
1(1  Ih'niisplurii 
ma-  shorttT  tli 
rer  than  tlic  tl: 


1  stripes.  Scut 
I  bluish  or  },mi> 
times  with  ma: 
)re  than  twice 
tij;  nearly  strai, 
of  <liscal  cell; 
lite;  mar};inali 


le  family  to  .stu 

I  larjje  amount 

reiul  stmly  wli 

Saeken,  the  la 


as  the  fourth    .     . 
13.— Femora  black  at  the  l>.ase 
Femora  yellow  at  the  base 
14.— The 


13 

14 

20 

ind  and  third  abdominal  cross-bamls  do  not  reach  the  lateral  niar^rin  15 


The  second  and  third  bands  reach  the  marKiu 18 

IS.— Eyes  bare 16 

Eyes  pubescent ;  the  sjiots  on  the  second  sejrincnt   separateil  from   the  later.-il 

niar^^in  ;  the  second  and  third  bands  bilaterally  oblii|nu     .  .  lotus 

(lone  bv  locill  >  18.--^P"t**  on  second  se;imcnt  not  reachin^j;  the  later.il  inar;;in  ;  cheeks  black, 

^1  *i. «,.,..! ,;  americanua 

them  thoroii^i  *    *♦        ,n    i  *     i  ,„ 

"Tue  band  or  spots  on  sccoud  segment  attains  the  lateral  margin     ....     17 
on.     AH  but  t  ly  ..^,„.^^j,  ,,,,jj,,. abbreviatusc? 

been  examilictl  Cheeks  yellow opinator 

^er  part  of  BailB.— Eyes  pubescent torvus 

ditions  append  Eyes  bare 19 

19.— ^ho  cross-bands  atttmuated  at  their  ends ribeaii 

Cross-bands  reach  the  sides  in  nearly  their  full  width Lesueurii 

20.— Tho  second  and  third  abdominal  cross-bands  attain  the  lateral  margin    .     .     21 

The  second  and  third  bands  not  (|uite  reach  tho  margin 23 

21i->/rhe  sejond  and  third  cross-bands  attenuated  at  their  tips ;  face  and  cheeks  yellow, 

protrituB  (7 , 9 

ribeBii  <? 

IBecond  and  third  cross-bands  not  distinctly  narrowed  at  their  ends    ...     22 

22.— Face  and  cheeks  wholly  yellow;  al)dominal  bands  bro.ad    .     .    zanthostomuB 

face  with  a  median  stripe  and  the  cheeks  black  ;  abdominal  hand  narrow, 

genualis 
th    snots  are  but  1^^'*^^'"''*' '*''""^  '  *''^*  '"'***  P'"'"  "f  iihdoininal  spots  narrowly  separated  from  tho 

aller  spots  "^        mar^nn atnericanus 

. 'iphccks  wholly  yellow ;  the  lirst  pair  of  abdominal  siwts  reach  quite  to  the  edge 

cceptic„.  I  opinator 


a  into  spots 
al  margin 


68 


lUM.KTIX    .11,    KNITKU    STATES    NATIONAL    MU.SKUM. 


24, — Fiici  si'lliiw  ;  ilif.s iikIiiikI  lliinl  crimM-hiiiKlHtliHtinctly  reiiiih  tli<-  liiti'i'iilniai. 

abbreviat-. 
Faco  witli  a  liniwn  Htiipo;  tlm  Micoiiil  niiil  t'linl  baii(ln  do  not  rt'iuli  Mn    l,,i, 
iiiui'^lii nmericaii: 

For  other  speciea,  see  descriptions.    8('<»,  also,  ApiMMulix. 

SyrphiiB  arouatus, 

Siurvn  nrrutttn  ralli-n,  Dipt.  Succ,  I',',  11  (If^Ki);   Zcttcr.Httilt,  Dipt.  ScuikI,. 

7r.>,  ami  viii,  :»i:!8,  'Z'i. 
Syrphiia  arriintiiH  Moijjoii,  SyHt.  Ht'sclir.,  iii.ItOi,  4li ;  Miu<|iiiirl,  Hist.  Nat.  Di| 

i, :..'{»;,  C;  Walknr,  Iiih.  Urit.,  i,2Hl»,8  ;  Schinor,  Vorh.  Z.  ]$.(}<•«.,  vii,  ;tU;  : 

Fauna  AiihIt.,  i.lJO'). 
Scara  lapponira  ZHtttTntodt,  Ins.  Lapp.,  598,  *i  (1838). 
SyrpliHH  lappoiikua  SvUiuer,  Yi'T,  Z.  M.  Goh,,  vii,;i4l ;  Osten  Sack«n,  Proc.  Dm 

Soo.  N.  IL,  xviii,  149;  i<l.,\Vi-Ht.  Dipt.,3a6  ;  id.,  Cat.  Dipt.,  lUa. 
SyrphuH  ngnon  \Vftlkor,  List,  etc.,  iii,579. 
SjirphuH  arcuc'nctuH  '^/alkor,  List,  etc.,  iii,  580. 
Syrphus  Akidive  Walkt-r,  List.,  etc.,  iii,  p.  579;  Williston,  Proe.  Ani.Phil.S' 

XX,  312  ilMdfa). 
Syrphu8  arcuatut,  var.  bipunotatus  Girschncr,  Wien.  Eut.Zcit.,  iii,  197,  pi, 

fig.  1. 

Habitat. — New  England,  Wyoming,  California,  Oregon,  VVaHliiiifrt 
Territory,  EnroiK»!,  Novsi  Scotia,  Hudson's  Bay  Territory  (Walk.). 

^  ,  9  .  Length,  9  to  12""».  Face  yellow  or  bluish-yellow ;  a  median  str 
not  reaching  the  antenme,  shining  black;  cheeks  more  shining  gn^ 
Aiitennie  dark  brown,  along  the  under  sid«^  more  or  I'ss  reddish.  Fro; 
triangle  nearly  like  the  face,  but  with  yellowish  dust;  pile  black 
slender  black  arch  above  the  baseof  antennte  (sometimes  di.ssolvcdr 
two  spots),  bent  downward  in  its  middle  portion,  and  immediately  In 
the  color  is  brighter  yellow;  front  in  female  black,  with  blacl^  ; 
shining,  except  along  tiie  sides,  where  it  is  thickly  yellowish  pollim 
to  above  the  middle,  in  which  jdaco  the  pollen  is  narrowly  sepiim; 
Eyes  bare.  Thorax  deep  shining  greenish  or  bluish  l)la(,'k,  willi  nit' 
abundant  light-colored  iiile.  Scutellum  yellowish  translucent,  wiii 
bluish  opalescent  reflection,  the  pile  chiefly  black.  Abdomen  bl;i 
mostly  shining,  with  three  i)airs  of  br'';ht  yellow  spots,  all  narro' 


S]n;plii 


Mab 

Net;  ]\ 

yellow 

sei)arated  from  the  lateral  margins;  tlu  ^rst  pair  a  little  more  broii'j'r'^ 
separated  than  the  others,  straight,  transverse,  elongate  oval;  ^*'i''aJ!|^' 
and  third  pairs  a  little  oblique,  concave  in  front,  convex  behind.    .. 
inner  ends  rounded,  the  outer  ends  acute,  directed  forwards;  fourth,  ^ 
ment  with  a  narrow  yellow  hind  margin ;  fifth  with  the  anterior  iiu?  „_^ 
and  the  hind  border  also,  yellow.    Legs  yellowish  red ;  base  of  front    ,.. 
middle  femora,  arul  the  hind  femora  except  the  tip,  black;  a  ri"?„-,j  f 
the  larger  part,  of  the  hind  tibiae,  and  terminal  joints  (or,  excei)t      , 
base)  of  all  the  tarsi  brownish.    Wings  nearly  hyaline,  subcostal  fQ_i| 
brownish,  stigma  darker.  ,t     _ 

Variety  arcuatiis.    Third  longitudinal  vein  nearly  straight,  or  Cj^.,  ..f. 

thehin 


yc 


'I 


V      I 


IISKIIM. 


1  till'  lalriiiliiiin: 
abbrevlat: 
it  rciicli  '111'  l.ii. 
.     .     nmerican; 


SYNOPSIS    OF    NOKTII    AMKHICAN    SYKI'IIID-K.  fi9 

«iirv«Ml.     Four  specinu'iiH,  Connecticut,  Now  Ilaiiijjsliin',  W.voiii- 


lulix. 


It,  Pi  lit.  Scund 


gttlt 

leg. 

Vaiii't.v  lapponicuM.  Third  lonjiitinlinal  vein  deeply  curved,  the  sub- 
mar^'iiial  cell  hence  inu(!li  Itroiuh  r  in  tiie  tni(hlle  part  than  beyond,  l-'if- 
teen  specinicns,  Connecticut,  New  llanip.sliiie,  Calit'oinia,  Ore^'on,  Cido- 
rado,  \'ii';:iiiia. 

Vaiicfy /fj/»/'n»/(M,v,  siilivar.  hiinonfatits  (liiscrhiier.  This  form  occurs 
in  America  (-    Si/rjilnm  Ahiilhe  Wallver).    May  it  not  be  duo  to  tln'  ••iVeets 

.VI.  Hist.  Nat.  Dii    of  dry  in;;.' 

}.OeH.,vii,  au; ;        ^1^^,  diileienccs,  other  than  in  thetliird  vein,  are  inconstant,  an<l  seem 
to  occur  e(|iial]v  anion;;  spt'('imens  iVom  all  ])aits  ot"  the  comi,:y      That 

Siick«(n,  Proc. D.K   this  dilleicnce  ah»ne  is  a  sutlicient  specific  i'liaracter  is  to  ine  douittlul; 

ipt.,  laa.  hence  1  have  herccniisidered  it  a  .secondary  or  varietal  chaiaiMer,  and 

have  tor  that  reason  cho.scn  the  older  name  Cor  the  specii's.  Scinner 
considered  <S'.  Inppoiiiciis  a  synonvm  of  S.  artiintiis.  Of  the  identity  of 
onrsiMcies  with  the  I'iiirctpean  there  can  be  no  <Ioiibt  ;  specimens  sent 

Zfit.,  iii,  197.  ?'•    by  Baron  Osten  Sactken  were  cempare<l  by  j)r.  Loew. 

From  tlie  reiiiaie  of  KuptodcH  rnhicris,  which  may  I.e  i-asily  confounded 

,     ,  .        with  Idpixiiticiis,  tiie  difference  in  the  Ien;>th  of  tlie  fiftii  abdominal  se;;- 

"•on,  Washmgi '.'     ,,....,   -^ 

"     '  mem  will  at  once  (listin;iiiisli  it. 

tory  (NNa  v.).         it^syrplius  nrcuriiKliis  Walker,  List,  etc.  (Hudson's  I5ay  Territory),  i.s 
^v;  iimei  .     ■      represcnteil  in  the  llritisii  ^Museum  by  two  specinicns,  one  of  which  i.s 


Proc.  Am.  PhiLS' 


re  shining  gn^ 


my  iS'.  iiiiKilopl.s;  the  other  belongs  to  the  group  of  S.  hipponicm.     The 


retl(  IS  .  .   ([^jg0j.iptj,,||  is  drawn  from  the  latter  spe(!iiiieii,  the  alMlominal  spots  of 

ist;  pile  black  ^^  ^„,,,„.,i^  l^,^.i„„.  „„,,.i,  „ioretlian  'slightlv  curved.'"— O.  S..  Cat.  Dijtt., 
laes  dissolved  i;  ^^^        '  ' 

iiinediatelylH 
witll  black  1   Syxjhua  nmalopis. 
lowisli   pollim        ''-  'S.'/'7'/'"s  umahpiH  Ostcn  Siickni,  Proc.  Bostou  Sue.  Nat.  Hist.,  \\  iii.  It"',  I-**,'!, 

rrowly  sepiiia:      jfabitat.—W'hitv.  :>[ountains.  New  Hampshire  (O.  S.),  (.onneetieut, 
'>'»*'l^'^^'*^'^'"  New.  Mexico! 

"4,9.  lOtoll""".    'Olale.   Eyes  pubescent;  face  of  a  dingy  brownish 
|w,  with  a  broad  brown  stripe  in  the  middle  (its  breadth  is  e(pial  to 


rauslucent,  win 
Abdomen  bla 


lots,  a  1.  imlf^f  its  length  or  more);  cheeks  black,  with  a  greenish  rellection;  a 
ittle  mor  '  hlai^,  broad,  oral  border;  antenniB  black,  front  and  vertex  likewi.se; 
ate  o\  a  ;  ^"^  faolll  tubercle  salient.  Thorax  dark  metallic  green,  clothed  with  black 
onvex  )e  inu .  pji^  mixed  with  fulvous  on  the  sides  and  near  the  scutelliim ;  the  latter 
^^''^^*^'^'  "^'Jdnlltyellowi.sh  brown,  with  metallic  redections,  be.set  with  lilack  pile, 
he  anterior  ail?  j^jj^,^jjlj  a  blackish  border  and  corm'rs.  Abdomen  bhick,  very  little 
;  baseot  ro  gi|ij||ng.  o,j  the  second  segment  two  oblong  yellow  spots  ;  on  the  third 
I,  black;  f^ '^"'•an^yFourth  segments  a  pair  of  lunate  spots,  club  sha])ed  on  the  inner 
nts  (or,  excep  end|truncate  on  the  outer,  and  considerably  excised  in  the  middle  ;  the 
line,  subcosta  fQujpgj  ,j,„|  jHYh  segments  with  a  narrow,  yellow,  iiosterior  margin  :  all 

thejfellow  parts  are  straw  colored.  Legs  black,  tip  of  femora  and  ba.se 
y  straight,  oi  ^'of  |f|ir,.  ydiowish  brown,  the  extent  of  this  brown  being  much  less  on 

theqiiKl  i>air.     Wiiiys  distinctly  iiifuscatiMl. 


70 


nUI.LKTIX    31,    UNITED    STATES    NATIONAL    MUSEUM. 


I        !      .iV 


I  u 


I    ' 


i^ 


\\  \ 


Fcnial*^  Front  aud  vertex  metallic  greenish  black ;  spots  on  sccoi 
segment  cosirctate  in  the  middle,  those  on  segments  three  and  fonnl 
solved  in  two,  so  that  these  two  segments  show  each  a  transverse  f 
of  .yellow  spots,  nearly  of  the  same  size  and  equidistant ;  the  flftli  ,y 
ment  has  two  spots  at  the  base ;  the  wings  are  hyaline.  In  all  otL 
res|H'cts  like  the  male. 

Two  males  and  one  female. 

1  have  not  the  slightest  doubt  that  these  males  and  females  Wh 
together;  the  ditt'erence  in  the  coloring  of  the  wings  has  no  importaiu 
as  to  that  in  the  coloring  of  the  abdomen,  I  shonld  not  wonder  if  i: 
species  proved  to  be  very  variable  in  this  respect,  and  if  interniedi 
stages  occurred  between  that  where  the  lunate  spots  are  entMo  a 
wheie  they  are  dissolved  in  two.  The  nbdomen  in  this  s])eci('s  is  m, 
convex  broader  and  somewhat  shorter  than  that  of  »S'.  htpponivus. 

In  the  specimens  described  above,  the  yellow  abdominal  niarkii 
do  not  come  in  contact  with  the  lateral  margin.  But  I  have  a  ])iiit 
specimens  {i  ,  9)  from  the  same  locality  in  which  this  contact  occi; 
In  the  female  the  spots  are  also  cut  in  two  as  they  are  in  the  typi 
specimens." — Osten  Sacken,  1.  c. 

I  have  three  female  speciiiiftns  from  Connecticut  (June  11),  on  b: 
soms  of  Prunus  virginianus,  that  seem  to  be  intermediate  between  t 
species  and  the  next,  *S'.  {ntrudens,  but  agreeing  rather  beLtsr  witii 
description  of  /S.  intriidens.    The  facial  stripe  is  black,  narrower  tl 
the  yellow  portion  on  the  sides.     The  antennte  are  wholly  reddish 
low;  in  one  specimen  only,  the  third  joint  is  brown ;  the  front  has  a  vL 
pollinose  interrupted  cross-band ;  the  pile  of  the  scutellnm  is  partly 
"wholly  yellowish.    The  abdomen  is  very  shining,  all  the  spots  attain 
lateral  margin,  those  of  th^thirdand  fourth  segments  are,  in  one  sjv 
men,  only  deeply  excised,  in  the  other  two  specimens  dissolved  into; 
spots;  the  spots  on  the  second  segment  are  broadly  oval  and  not  at 
excised  in  front.    The  legs  are  light  yellow;  the  front  and  middle  ten 
at  the  base,  and  the  hind  fennora  on  the  basal  half,  are  black;  the  1 
tibijB  with  a  brownish  ring,  and  the  hind  tarsi  in  one  sjiecimen  bic 
ish.    A  single  female  from  New  Mexico  (G.  F.  Gaumer)  seems  to  w:  broa 
perfectly  with  the  description.    The  spots  on  the  tirst  segment  iiit    -^{^ 
cised  in  front,  and  those  on  the  third  and  fourth  segments  are  not    bl^^Ii 
in  two  and  reach  the  lateral  margin  distinctly.    The  sjx'cnes,  as  (V  color 
Sacken  says,  is  evidently  a  variable  one,  and  I  am  inclined  to  doubt   ^,^^, 
validity  of  N.  tH<rju/e/is.  • 


i«lk 

pile 

com 

nod 

voui 

the 

mar 

dub 

broti 

oislu 

Ikiia 

Leg^ 

onl  I 

m^ 
Willi 

Til 

fe 
H|ni 
Jl&o 
d^i 

Cllllll! 

faeial 
striki 
varia 


Bjtpb 


Ma 

a  bin 
lowg 


Syrphus  intrudens. 

S!irj)liiii'-  iiitnidoi'i  O.stcii  Sack(>n,  West.  Uijyt.,  •'-*',  1877. 

Habitat,— CiiWi'onuii  (O.  S.). 

"Length  about  10""".  Male.  Eyes  pubescent;  face  brownish  yd 
with  a  broad  black  strii)e  in  the  middle,  abbreviated  before  the  antti 
and  narrower  tlian  the  yellow  jiortion  of  tiie  face  on  each  sideo; 
the  black  is  prolonged  along  the  oral  border  to  the  black  cheeks,  vl 


scatc 
hairy, 
spots, 
indist 
ment.^ 
blaek 
Femo 


V   \ 


MUSEUM. 

;  spots  on  so(!(j 
liroo  and  four  i! 
1  a  transverse  n 
\nt ;  the  flftli  st 
line.    In  all  otl. 


id  feniales  bdd: 
Ills  no  iniportaiii 
not  wonder  if  t; 
lid  if  interinedi, 
ts  are  entni'  . 
liis  si)ecies  is  m 
<.  htpponivus. 
doniinal  iiiarkii 
It  I  have  a  iiai: 
iis  contact  occi; 
are  in  the  typi 

(June  11),  on  b: 
diate  between; 
ler  'vetter  witli 
iick,  narrower  tl 
wholly  reddisli 
le  front  has  a  AvL 
itellnin  is  partly 
the  spots  attain 
ts  are,  in  one  s]). 
■(dissolved  into: 
oval  and  not  at 
and  middle  fen 
ire  black ;  the  li 
le  specimen  bic 
nei)  seems  to  a? 
rst  sefjment  aiv 
'•iinents  are  urn 
':  s])«'(Mes,  as  ('< 
clined  to  doubt 


SYNOPSIS    OF   NORTH    AMERICAN    SYRPHID^.. 


71 


ce  brownish  ytl 

belore  the  aiitii 

on  each  side  o; 

ilack  cheeks.  \^^ 


ive  a  slight  greenish  reflection ;  antennae  black,  third  joint  some- 
times slightly  reddish  at  the  base ;  front  and  vertex  black,  with  a  green- 
ish letlection  and  black  pile ;  occiput  beset  with  a  fringe  of  fulvous 
pile.  Thorax  dark  nietalli(;  green,  clothed  with  fulvous  pile,  especially 
«ou8picuous  on  llie  pleura';  siMitclliun  with  a  shade  of  dull  yellowish 
QDder  tlie  strong  grreiiisli  metallic  luster;  its  pile  is  black;  a  few  ful- 
vous hairs  on  tlie  sides  only.  Abdomen  black,  very  little  shining;  on 
the  second  segiMcnt  two  oblong  yellow  sjiots,  not  reaching  the  lateral 
margin ;  on  the  third  and  fourth  segments  a  pair  of  deeply  lunate  spots, 
club  sliaped  at  both  ends,  touching  the  anterior  margin  on  one  side, 
broadly  contiguous  to  the  lateral  margin  on  the  other;  the  deep  (ex- 
cision on  them  has  a  triangular  .shajje ;  fourth  and  fifth  segments  with 
a  narrow  yellow  posterior  margin.  Ilalteres  with  a  lemon  yellow  knob. 
Legs  reddish;  anterior  femora  black  on  their  proximal  half;  hind  feni- 
Oira  blairk,  except  the  tip;  hind  tibia'  with  a  brown  ring  in  the  middle, 
the  otiier  tibiic  also  slightly  niarkeil  with  brown;  tarsi  brownish  above. 
Wings  distinctly  tinged  with  brownish;  stigma  brownish. 

flir"e  males,  April  15-20. 
ery  like  Syrphm  amalopis  ().  S.,  from  the  White  Mountains,  New 
Hampshire,  but  the  pile  on  the  occtijuit  is  bright  fulvous,  not  pale 
jeUowish  white;  there  is  more  tulvo:is  i)ile  on  the  thorax;  the  ab- 
dominal spots  are  a  little  larger,  their  inner  club-shaped  end  more 
dnnisy,  the  emargination  deeper ;  the  legs  are  less  dark  colored;  the 
facial  tuliercle  less  prominent.  Nevertheless,  the  resemblance  is  very 
Striking.  S.  amalopis  seems  to  be  a  very  variable  species.  The  same 
variations  may  occur  in  iS.  intnidens.'''' — Osten  isacken,  1.  c. 

Sjlphus  contumax. 

Si/rphus  contumax  Oisteii  Sackeii,  Proc.  Bust.  Soc.  Nat.  Hist.,  xviii,  148,  le??5. 
Si/rphuH  adolcaociix  Walker,  List,  etc.,  iii,  .')84. 

Mal'itat. — White  Mountains,  New  Hampshire! 

'%S  ,  ?.  Length  about  n,.^""".  Eyes  distinctly  jiubescent.  Face  with 
alluisii  reflection,  sometiuuvs  almost  concealing  the  dull  brownish  yel- 
lo^  ground  color.  Cheeks  and  oral  border  broadly  black;  front  very 
briiad  in  the  female,  black,  clothed  with  grayish  jioUen ;  in  the  nnile 
with  a  bluish  reflection.  Vertex  greenish  black,  metallic.  Antenna; 
black,  inserted  on  brownish  yellow  ground.  Thorax  greenish  bronze 
ool^r,  with  indistinci  longitudinal  stripes  of  an  opaxpie  brownish;  dor- 
8I1SI  beset  with  brownish;  pleura' with  brownish  fulvous  erect  pile; 
scutenum  dull  yellowish,  with  a  bluish  reflecttion.  Abdomen  black,  very 
hairy,  with  three  pairs  of  oblong,  transverse,  straight,  brownish  yellow 
spots,  which  as  a  rule  <lo  not  reach  the  margin,  but  sometimes  emit  an 
incHstinct  prolongation  anteriorly  which  touches  it;  the  last  two  seg- 
m^ts  are  bordered  with  yellow;  the  jiile  on  the  abdomen,  yellow  and 
bllisk,  is,  especially  in  the  male,  long,  (Mcct,  and  rather  conspicjuous. 
Fflpiora  (of  the  male)  black  on  their  jiroximal  half,  often  beyond,  hind 


n 


BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM, 


f 


{<'      h 


Ml 


WM\ 


V        if 


femora  up  to  four-fifths  of  their  length  ;  tibije  brownish  yellow  ;  tar> 
black.  In  the  female  the  femora  are  black  at  their  bases  only ;  win;; 
hyaline,  sometimes  tinged  with  brownish  ;  stigma  brownish,  third  loi 
gitudiual  veir.  nearly  straight. 

Three  males  and  two  females  from  Mount  Washington. 

The  facial  tubercle  in  this  species  is  very  salient,  the  whole  Iowk 
part  of  the  face  somewhat  projecting,  the  front  of  the  female  conipar,,  '^\ 


veite: 
fhebi 
tion,  < 
taber( 
postei 
iug.  il 


tively  broad,  the  first  joint  of  the  hind  tarsi  of  the  male  distiiicti 


baset 


swollen.    The  general  appearance  of  this  species  is  ditierent  from  a    ,  .  . 

ordinary  Syrplius." — Osten  Sacken.  a,  a  t) 

^^ Si/rjihus  adoleticens  is  ie])resented  in  tl>e  British  ^Museum  by  tliii     f  u„- 

specimens;  one  belongs  to  the  group  of  S.  lapjmnicKs,  tlie  other  (Im.     ^-.^i 

Nova  Scotia)  is  S.  amen'canus.,  t\w  third  is  my  S.  contunia.r.     Tiled.      ^    . 
'  ne&T  t 

scrii)tion  was  i)robal)lv  drawn  from  the  latter,  though  it  is  very  uniiieii;    _„_-i 


iug."_().  S.,  Cat.  Dipt.,  :*4r>. 


thefr( 
a  litth 
margi 
red(iis 
hindf 
hiti#t 


Syrphus  mentalis,  n.  hj). 
Habitat. — Washington  Teiritory! 

5.  Length,  0""".  .  Eyes  pubescent.  Front  shining  black,  extendii 
down  on  the  sides  as  far  as  the  insertion  of  the  antenna',  but  the  latti 
inserted  on  yellow  ground  ;  across  the  middle  of  tiie  front  with  a  rntln 
narrow,  i'lterrupted,  yellowish  pollinose  band;  jiile  Idack 
brownish  black.  Face  yellow,  the  (cheeks  in  front, and  thence  to  the  mi 
die,  along  the  oral  margin,  and  a  moderately  broad  facial  strijie,  loiH; 
ing  acutely  to  the  base  of  the  antenna',  black.  Cheeks  behind,  a; 
across  behind  the  mouth,  yellow.  Thorax  shining  greenish  black,  i 
the  pleur;x!  with  whitish  pile.  Scutelluiii  dark,  subtranslucent,  oiilv 
little  yellowish,  with  black  lule.  Abdomen  broader  than  the  tliuin 
shining,  with  three  pairs  of  slender  spots  ;  first  pair  more  broadly  sij 
rated,  their  outer  eml  attenuated,  cur\  ing  forward  to  meet  the  latti 
margin  ;  second  and  third  pairs  scarcely  a  fourth  the  width  of  the  si, 
nieuts,  interrupted  by  about  their  own  width,  reaching  nearly  or  (]ii; 
to  the  lateral  margin;  fifth  and  sixth  segments  wholly  black.  Lc 
dark  yellowish  red;  base  of  all  the  femora  (on  the  hind  pair  incliiiiii 
the  larger  part),  and  the  hind  tarsi,  black;  the  hind  tibiie  excep!  tl 
base,  and  the  front  and  middle  tarsi,  brown.  Wings  lightly  tinged  wi;  Bjfjfhxi 
brown  ;  the  stigma  brown. 

One  specimen;  an  additional  one  in  the  Museum  of  Comparative  Z 
ology  at  Cambridge.  JEfab 

The  front  in  this  species  is  rather  broad  above,  and  the  abdoiiiiii       i,$ 
spots  are  unusually  narrow. 


Ante.iii  Wiifg.' 
Wan 
l*e 
tiniBtly 
the  bti 
N(»rth 
Hifttor 
It  diff 
nafiov 
veriiel: 
except 
more  s 
sid«B€ 
spe^e^ 

f   S: 
i,  L 


Syrphus  disjectus. 

Syrphitu  diKJuyictits  WilliHton  (noii  Macqu.art),  Proc.  Aui.  Phil.  Soc,  xx,  314  (1  ■■ 

Habitat. — Washington  Territory ! 

i  .  Length,  1)  to  12""".     Kyes  bare.     Frontal  triangle  shining  iiietal! 
greenish  olack,  narrowly  yellow  along  the  eyes,  the  i)ile,  and  that  ot  tt 


Fnmt 
ish  bla 
blatoh 
ten^in, 
of  ^e 
sUibtl 


\*    il 


*^ 


MUSEUM. 

ish  yt'llow  ;  tar. 
ases  only ;  win;- 
wuisli,  third  lot 

ton. 

the  whole  lowe 

female  conipar,, 

male  distinct! 

lifferent  from  a: 

MusiMini  by  tliiv 
,  tlic  other  (lin 
itHOKi.r.  Tlu'  (1 
t  is  verv  uniiie;;: 


SVNOI'SIS    OF    NORTH    AMERICAN    SYRFHIDVE. 


TS 


black,  exteiidii 

la',  l)ut  the  liittf 

•ont  with  a  ratb 

blaek.     Antciii: 

:henee  to  the  mi 

eiai  stripe,  rein 

eeks  behind,  a: 

reenish  black,  i 

anslncent,  only 

than  the  tiioi.i 

ore  broadly  sc] 

)  meet  the  late: 

width  of  the  si, 

g  nearly  or  (jn; 

dlv  black,    h: 

id  pair  inclnilii 

tibiie  except  ti 

Hhtly  tinge<l  wi: 

Comparative  1 

id  the  abdoniiii 


l.Soc,  XX,  314(1-. 


L^  shining  metal! 
e,  and  that  oftl 


vertex  also,  black.  Aiiteiuiiii  brownish  black,  the  first  two  joints  and 
the  base  of  the  third  below,  red<lish.  Face  yellow,  with  a  bluish  reflec- 
tion, on  the  sides  thinly  wintish  pilose,  no  dark  spot  nor  stripe  on  the 
tubercle;  (cheeks  below  the  eyes,  in  front,  black,  behind  and  across  the 
posterior  oral  margin,  yellow.  Thorax  brownish  gr*}enish  black,  shin- 
iug,  ihc  pile,  especially  on  the  sides  and  on  the  pleura),  orange  colored. 
Soafc^llnm  only  a  Utile  yellowish,  more  bluish  opalescent,  black  at  the 
base  and  corners;  pile  in  large  part  black.  Abdomen  black,  but  little 
shining,  except  on  the  first  segment,  the  h-.M-row  margin  of  the  second 
and  third  segments,  and  the  fourth  and  fifth  wholly;  with  three  pairs 
of  bright  yellow  spots,  all  very  distinctly  separated  from  the  lateral 
margins;  the  first  pair  small,  oval,  broadly  separated  from  each  other, 
near  the  middle  of  the  segment;  second  ])air  large,  nearly  square,  with 
rounded  angles,  more  than  half  as  wide  as  the  segment,  not  reaching 
the  front  margin,  sei)arated  by  s(!arcely  hai'"  their  width;  the  third  pair 
a  little  smaller,  somewhat  oblique,  au<l  sometimes  totu;hing  the  front 
margin ;  fifth  segment  yellow,  with  a  large  triangular  black  spot.  Legs 
reddish  yellow;  coxjB,  excej)t  the  trochanters,  front  and  middle  femora, 
hind  femora,  except  narrowly  at  the  base  and  the  outer  third  or  fourth, 
hind  tibiie,  excei)t  tiie  base  and  tip,  and  the  hind  tarsi,  brown  or  l)lack. 
Wings  tinged  with  brownish,  the  stigma  brown. 

I^ur  specimens. 

The  large  sjjots  on  the  third  and  fourth  segments,  which  are  very  dis- 
tinctly separated  from  each  other  and  the  lateral  margins,  together  with 
the  bare  eyes,  will  distinguish  this  species  from  any  described  from 
NiHrth  America.  A  single  female  from  the  Boston  Society  of  Natural 
History  (S.  Ilenshaw)  is  closely  allied  to  this,  possibly  it  is  the  same. 
It  differs,  howes'er,  in  the  spots  of  the  second  segment  being  larger, 
naiTOwly  se])arated,  those  of  the  third  and  fourth  segments  longer  trans- 
versely and  not  so  wide,  and  nu)re  narrowly  separated;  the  abdomen, 
exoept  the  second  segment,  is  more  shining,  the  dorsum  of  the  thorax 
more  shining  greenish,  and  on  the  sides  thickly  yellowish  i)ollinose  ;  the 
sides  of  the  front  are  j'ellow  on  the  lower  i)art.  It  is  probably  another 
speeies,  but  more  specimens  are  needed  to  settle  the  question. 

BjXfihuB  velutinuc. 

Sip-phiis  vehitiniis  ■"Villiston,  Proc.  Am.  Pliil.  Sdc,  xx,  314,  1882. 
;,  lHcliiiroK!irphu8  tricolor  IMyot,  Annates  Soc.  Eiit.  de  France,  1884,  73. 

Sabitat.—'Mouut  Hood,  Oregon!,  California  (Bigot). 
4,9.  Length,  11  to  12'"'".  Eyes  very  distinctly  pilose  in  both  sexes. 
Front  shining  green-black  with  black  pile.  Antennre  black  or  brown- 
ish black.  The  yellow  of  the  face  is  ob  cured  somewhat  by  a  metallic 
blntoh  reflection,  a  rather  broad  black  shining  stripe  in  the  middle,  ex- 
tending along  the  oral  border  to  the  (jlieeks,  which,  with  the  lower  part 
of  tjie  posterior  orbits,  are  gn'eiiish  black.  Dorsum  of  thorax  black, 
slijl^tly  greenish,  only  a  little  shining,  ])ile  abundant,  rather  long,  light 


M 


74 


BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 


,l.    '  I 


'■  iir 
'II    l^l-'"' 

m 


I   •!  i 


i       !.'"j| 


orange  colored,  or  light  yellowish,  except  across  the  disk,  where  r 
blackish.  Scutellum  obscure  yellowish,  translucent,  the  sides  audi 
broadlj'  bluish  black.  Abdomen  elongate,  scarcely  broader  than 
tl  orax,  the  sides  nearly  parallel  to  the  end  of  the  third  segment ;  ojni 
black;  first  segment,  tli3  hind  border  of  the  fourth  segment,  dilau, 
the  middle,  and  the  fifdi  segment  wholly,  shining  greenish  nu'tu 
second  segUHMit  with  large  spots;  in  the  male  rounded  on  tlie  inncii; 
and  only  touching  the  front  border  on  the  outer  part,  somewhat  at 
uated  before  reaching  the  lateral  margin  ;  in  the  female  longer,  hk 
square,  attaining  the  front  border  for  nearly  their  whole  length  ;  tl 
and  i'ourth  segments  before  their  middle  with  a  straigiit,  narrow  ci 
band,  inteirui)ted  in  the  middle  for  about  their  own  width.  Legs  1)1 
terminal  lialf  of  front  and  middle  femora,  front  and  nuddle  tibia',  cxi 
brownish  rings  beyond  the  middle, yellow.  Wings  hj  aline,  stigma  bio 

Syrphus  pauxillus,  n.  sp. 

Habitat. — New  Mexico ! 

9  .  Length,  7'""'.  Eyes  pilose.  Face  yellow,  a  broad  median  str 
not  reaching  the  antenna},  and  cheeks,  shining  black ;  in  profile  tlic; 
is  projecting,  the  distance  from  antennse  to  tip  of  tubercle  distin 
greater  than  from  the  antenna}  to  ocelli.  Antenn.'e  black ;  the  ti 
joint  brown,  on  the  under  side  near  the  base  r«  ildish.  Dorsuii 
thorax  shining  bluish-black,  with  light  yellowish  pile.  Scutellum  i 
faintly  yellowish.  Abdomen  broadly  oval,  shining  black,  with  tl 
pairs  of  yellow  spots,  which  are  narrow  and  rather  narrowly  sepiini; 
all  of  them  narrowly,  but  distinctly  separated  from  the  lateral  mar, 
first  i)air  straight,  transverse;  the  second  and  third  pairs  oblique,  ii: 
ate,  their  anterior  end  nearly  touching  the  front  margin  the  postt 
end  near  the  middle  of  the  segment;  the  spots  are  concave  iuti 
and  convex  behind,  of  nearly  equal  width;  fourth  segment  with  a: 
row  hind  margin  ;  fifth  segment  with  a  small  spot  on  the  front  aiij; 
and  a  narrow  margin  behind,  yellow.  Legs  yellow,  femora  black  iit 
base  (the  hind  legs  wanting).     Wings  hyaline,  stigma  brownish. 

One  s])ecimen  (G.  F.  Gaumer). 

Syrphus  sodalis,  n.  nj). 
Habitat. — Colorado ! 

9 .  Length,  10""".  Eyes  pilose.  Face  yellow,  lightly  pollinost 
the  sides,  a  small  brownish  spot  on  the  tubercle;  oral  margin  ami 
cheeks  metallic  bliick.  Antenna'  black,  third  joint  reddish  below i 
the  base.  Front  black,  broadly  grayish  pollinose  across  the  iniii' 
leaving  the  vertex  and  a  small  spot  below  more  metallic  black ;  a  > 
der  arch,  immediately  above  the  antennas  yellow;  i)ile  of  front  li 
Lateral  ])osterior  orbits  thickly  grayish  pollinose.  Dorsum  of  tlin 
dei'jt  shining  green,  with  light  yello-.,  ])ile.  Scutellum  lid»t  yellow 
subtran^lucent.  Abdomen  broadly  oval,  shining  black  ;  the  ci 
bands  yellow,  interrupted.    Tiie  first  pair  of  spots  is  more  broadh  > 


L.   MUSEUM. 

le  disk,  where  i 
.,  the  sides  and  1 
,'  broader  than 
d  sejjinent ;  ojia 
segment,  <lilaUi 
jii-eeiiish  incta: 
d  on  the  inueic: 
rt,  somewhat  at 
nude  h)n;i;er,  lu; 
vliok^  lengtli ;  ti 
liyiit,  narrow  ci 
V  id  til.  Legs  1)1 
niddle  tibia',  t'Xi 
dine,  stigma  bio 


road  median  str 
;  in  profile  tlie: 
tubercle  distin 
e  black;  the  ti 
ildish.  Dorsiui 
le.  Scutelluiiii 
;  black,  witli  tl 
larrowly  separa: 
the  lateral  mar; 
pairs  oblique,  a: 
largin  the  postc 
re  concave  in  li 
egment  with  a; 
m  the  front  an;. 
femora  black  at 
na  brownish. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIID^. 


75 


ightly  poUiiiost 
nil  margin  and 
reddish  below i 
across  the  iniii 
allic  black  ;  a  ^ 
pile  of  front  bli 

Dorsum  of  tln' 
im  liv'ht  yellow 

black  ;  the  ci 
i  more  broadly  > 


arated,  and  have  a  slender  anterior  prolongation  that  reaches  quite  to 
the  lateral  margin;  the  second  and  third  pairs  are  less  widely  sepa- 
rated and  the  outer  ends  are  distinctly  cut  otlfrom  the  lateral  umrgins; 
the  spots  are  on  the  front  part  of  the  segments,  moderately  broad,  their 
inner  ends  nearly  touching  the  front  margin  of  the  segments;  they  are 
very  slightly  obiiqne  in  position,  gently  concave  in  frou  and  convex 
behind,  then-  outer  i)osterior  putts  rounded ;  fifth  segnitnt  with  a  nar- 
row hind  margin  narrowly  interrui)ted,  and  coalesceut  on  the  sides 
with  the  yellow  of  the  next  segment  in  front;  the  fifth  segment  also 
■with  a  slender  yellow  hind  border.  Legs  black;  «listal  half  of  front 
and  middle  femora,  tip  of  hind  femora,  broad  base  of  all  the  tibiai  and 
tips  of  four  front  tibia',  yellow.  Wings  hyaline;  stignui  light  yellow. 
One  specimen  (II.  K.  Morrison). 

Byiphus  lotus,  II.  H\y. 

Mabitat.—Aiizouii ! 

t.  Length,  10""".  Eyes  pilose.  Face  and  cheeks  yellow,  the  former, 
in  ttie  single  specimen,  of  a  strong  green  tint ;  a  facial  stripe,  not  reach- 
ing the  antenuie,  brown.  Front  black,  grayish-yellowish  dusted  across 
the  middle,  leaving  a  large  oval  sjiot  below,  and  the  vertex,  black.  An- 
tennae brown,  the  third  joint  below  near  the  base  reddish.  Pile  of  front 
wholly  black,  of  theocciput  light  yeMow.  Dorsum  of  thorax  deep  green,  in 
front  with  two  grayish  poUiiiose  stripes.  S(!Utellum  subtranslucent  ob- 
BOnre  yellow,  the  i)ile  chietly  black.  Abdomen  but  little  shining,  black ; 
the  Lands  all  distinctly  seimrated  by  •:  black  interval  from  the  lateral 
margiis;  first  cross-band  interrupted  by  a  small  interval ;  second  and 
third  bands  bilaterally  oblique,  cut  off"  squarely  at  the  ends,  and  touching 
the  front  bolder  for  a  considerable  distance  in  the  middle;  on  each  side 
in  front  a  little  concave,  on  the  sides  behind  nearly  straight,  or  gently 
convex,  the  two  si<les  forming  a  very  shallow  inverted  V  ;  posterior 
margin  of  the  fourth  segment,  a  spot  on  the  anterior  angle  of  the  fifth, 
and  a  slender  hind  margin,  yellow.  Legs  yellow,  base  of  all  the  femora 
black.    Wings  hyaline,  stigma  brownish. 

One  specimen,  Arizona  (II.  K.  Alorrison). 

.Another  female  specimen  from  New  Mexico  (Geo.  F.  Gaumer)  is  i)er- 
baps  allied  to  this.  The  facial  strijie  is  black,  and  there  is  a  black 
atripe  on  the  cheeks;  the  second  and  thii'd  abdominal  cross-bands  are 
more  obli(jue,  and  strongly  concave  in  front,  and  the  second  is  nar- 
rowly interrupted  in  the  middle;  they  are  both  more  convex  behind, 
and  the  form  more  deeiily  V-shaped.  The  hind  femora  are  black  on 
newly  their  whole  length;  the  hind  tibiu'  have  a  lilack  ring,  and  the 
hind  tarsi,  except  the  base,  are  also  bhuik.  From  (inialopNis,  with  which 
it  Bnay  be  conlbunded  when  the  sjiots  are  separated,  it  seems  to  be  dis- 
tiUQt  in  its  hii'ger  size,  more  oblicpit'  spots  (all  ot  which  are  distinctly 
separated  froni  the  lateral  margins),  lighter  <<>loied  scutelluni,  etc. 


I; 


i   * 


t'  ( 


i^ 


^ 


76 


BULLETIN  31,  UNITED  STATES  NATIONAL  MUSEUM. 


SyrpbuB  diversipes. 

SyrphiiH  (liversipeH  Miio(|imrt,  Dipt.   Exot.,  4'  Sni>pl.,   lo.'i,  54;  Osteu  fi.v 

Priic.  Host.  Soc.  Nat.  Mint.,  xviii,  141),  IHTf). 
T  SyrphiiK  diictcllim  Zi'ttorsti'dt,  Dipr.  Sciiml.,  ii,  7\'2,  4."). 


.^ 


ftoni 

domii 

cediii 

Syrpb 


''^"hitat. — White  -Mouiitiiiii.s,  New  Ilaiiiitsliirc,  New  York,  Wasli 
ton  Territory!,  Liike  Superior  (O.  S.),  New  l-'oniKlland  (Macc].). 

3,9.  Leiifftli,  i)""".     "Abdoineii  narrow,  with  nearly  i)aralU'l  si 
first  segment  (  $  )  grecMiish  bhiok,  with  more  or  lessyeUow  anteriorh  opalet 
on  the  sides;  in  tlie  female  the  yellow  prevails,  leavinj^  only  a  met  quite 
j;re(Mi  spot  on  eacth  side,  wliich  often  is  subobsolete ;  the  followiii-    small 
sejiiiients  have  eacli  a  yelloM' cross  ban  !  (»n  their  anterior  iialf;  tin    lower 
cross-band  is  broadly  inteniiptecl :  in  the  male  tin;  interruption  •   browii 
the  .shape  of  an  iu\erted  bhick  tiian^ile,  exi)andin;;'  anteriorly  so;,  thean 
occupy  nearly  the  whoh-  anicrinT-  marj;in  of  the  .sejiiuent;  in  the  fti  befcwe 
this  triaiifile  is  narrowband  occupies  but  a  small  jiortion  of  the  aiiti  with  1 
marjiin  ;  thus  in  the  female  the  yelhtw  of  the  cross  band  coalesces  ■  pile^ 
ihat  npoTi  th(;  lirst  sej;inent ;  the  following;-  cross  bands  areentiiv.  side^ 
second  and  third  nearly  of  the  same  breadth  and  not  attenuated  oi!  the  fir 
sides;  the  fourth  band  in  the  male  o<;cnpies  neaily  the  whole  scliu  fornlec 
except  a  bhuik  semicircle  ])osteriorly  :  in  tlu'  fennde  it  occupies  tin  abdom 
terior  half  of  Mie  seii-inent,  and  is  <rently  arched,  and  distinctly  nob  only  a 
posteriorly.     Face  yellowish,  with  a  l»luisli  retle<':tion,  soniotinics  In  aoglU" 
ish  in  the  inich'le;  above  the  antenna*  a  conspicuous  black  s])()t  i-derpoi 
rounded  by  the  yellowish  ])ollen,  which  covers  tiie  rest  of  tiie  I'roiii ;  altoget 
tenuiB  reddish,  upjx'r  half  of  the  third  joint,  as  well  as  of  the  prcci  and  on 
ones  brown.     Eyes  bare.     Thorax  nietalli*;  {jreen  ;  scMitelluni  yellnvters  bl 
with   a   metallic  j^rcen    reil.'ction  ;    humeri  and  a  i>art  of  the  jih  costlU 
clothed  with  yellowish  jtollen.     Leys  yellow;  outer  half  of  the  istraigh 
femora  (sometimes  i^early  the  whole  hind  femora,  ex(!ei)t  the  base),:     F^nr 
tibice  and  tarsi  brown  ;  knees  yellowish.     \\'in;;s  with  a  brownish  si  onlyin 
ou  the  apex,  usually  distinct  in  the  female,  often  nearly  obsolete  iii^n  th<^ 
male.  3aoken 

Ten  male  and  thirty  female  specimens.    Two  male  specimens  ligyrphui 
the  four  anterior  femora  distinctly  infuscatcd  at  the  base.  m 

8.  cinctellus  Zetterstedt,  is  vt'-y  like  this  species  and  probably  idi        .Sy 
cal  M'ith  it.     His  description  ajfrees  with  the  North  American  sp'     .xl 
mens.     A  European  specimen  in  the  Museum  of  Comparative  Zonli        f 
named  by  Dr.  Loew,  does  not  show  any  dilference  worth  noticiiif; 
Osten  Sacken,  1.  c. 

Two  male  and  sixteen  feu)ale  si>ecimens  from  the  White  Mouiitu 
New  Hampshire  (.lackson,  July  25),  aji'n-e  fully  with  this  descripti 
a  sinj>le  female  from  the  same  locality  has,  ''owevei',  the  lirst  ai)(l> 
ond  alxlominal  sefiinents  as  in  the  male.  A  sinjile  female  from  Ur 
ington  Territory  agrees  throughout.  My  female  specimens  li;iv 
peculiarity,  not  noticed  by  Jiaron  Osten  Sacken,  wherein  they  d 


MUSEUM. 


SVNOl'SIS    OF    XOUTII    AMEHK'AN    SYIM'HID.E. 


Tt 


55,  54;  Osteu  Sai 


flponi  all  tin-  No'tli  Aiiicrican  Syrphus  known  to  nio,  vi/,,  tlic  fifth  ab- 
dominal so^rniciit  is  unnsiially  lonj,',  more  than  half  as  long  us  the  pre- 
ceding, a},MO('in{j  in  this  respect  with  Eupeodes, 


iw  York,  Wasli 
a  (MacMj.). 
arly  i)arallf'l  si- 
ellow  anterioii' 


Syrpbus  protritiia.  • 

SjiriihiiK  j>folritii.t  Ostcii  Sackcii.  WeHt.  Dipt.,  328. 

Uflfc/^f/.— Caliioniia  (().  S.) 

**i.  L(Mij;tli,  10  to  1-""".  My.'s  ylabrons.  Face  yellow,  with  a  bluish 
opaleseencc  ;  on  the  checks  a  lar;ie  blaekish  ii*j)ot  below  the  eye,  and  not 
inj;  only  a  imi  qaite  reachiiif;  tiie  oral  niarfjin  (it  is  variable  in  size,  sometimes  very 
the  following;  small );  tin;  lower  edge  of  the  head  behind  the  month  and  between  the 
erior  half;  tin  lower  ends  of  the  eyes  is  again  yellow.  Antennse  red,  sometimes  faintly 
interruption  i  brown  ois  the  upper  side  of  the  third  joint;  front  brownish  yellow  above 
anteriorly  so;  the  antenna-,  black,  slightly  pruijiose,  and  with  black  pile  in  the  corner, 
lent;  in  the  fci  between  the  eyes;  vertex  black,  with  black  pile;  occiput  grayish,  beset 
tioii  of  the  aiitt  with  i)ale  hairs.  Thorax  dark  bronze  green,  beset  with  dense  yellowish 
land  coalesces  pile..  Scutcllniii  yellowish,  with  black  pile,  some  yellowish  hairs  on  each 
iiids  are  entiit.  side.  Abdomen  black,  opaque,  with  three  reddish  yellow  cross- bands, 
t  attenuated  on  the  first  of  which  is  broadly  ipterrupted;  the  two  yellow  spots  thus 
the  whole  se^ni  formed  .nv  prolonged  along  the  lateral  margin  to  the  very  base  of  the 
1  it  oc(!U]iies  till  abdomen;  the  second  and  third  bands  reach  the  lateral  margin,  being 
1  distinctly  iioionlya  litth^  attenuated  before  it;  they  are  biconvex  posteriorly,  witli  an 
1,  sonu'tinu's  Itn  anjinilar  ciuargination  in  the  middle  ;  fourth  segment  with  a  yellow  bor- 
s  black  sjiot  i-  der  posteriorly;  the  fifth  red,  with  a  black  triangle  in  the  middle.  Legs 
•st  of  the  from  laltogetlicrieddi.sh,  often  a  brown  shade  in  the  middle  of  tiie  hind  tibifo 
as  of  the  preci  and  on  the  liiiid  tarsi,  femora  red  I'lom  the  very  base;  coxie  and  trochau- 
cutelliim  ye]lo«ter8  black.  Wings  subliyaliiie;  their  root  tinged  with  brownish,  the 
•art  of  the  [ili  costal  ecll  with  yellowish;  stigma  brownish  yellow,  third  vein  nearly 
r  half  of  tlif  i straight. 

i;ept  the  base).:  'Ppnv  males.  Is  veiy  like  the  common  S.  rihcsii  of  the  Atlantic  States; 
:h  a  brownisli  sianlyin  that  species  tlu-  male  has  black  hind  femora,  the  black  spot 
arly  obsolete  iii^n  the  cheek.s  is  smaller,  and  the  antennai  are  much  darker." — Osten 
3aoken.  I.  c. 

lie  specimens  li3yq;Ausribesii. 

l^f^*^*-'-  ''.;ifH.>((((  r(/jM;)T,iiin('.Fann;i  Siicc,  liSl()(l78l);  Sehrnnk,  Eiiiuu. Insect.  An8tr.,905. 

nd  probably  W.  ■SyrplntK  rlbcuH  Liitnillr.  Hvn.  C'nihit.,  iv,  :)-J5;  Faljricius,  Spec.  Insect.,  ii,  432,  57; 

ll  American  t^Y       -k        ''''''^<""-  '^.V'*'-'  i^'-  -'W;  tOO;  Mei<;on,  Syst.  Bt'sclir.,  iii,:50tJ,  4'.);  Walker,  Ins. 
mparative  Zool.,     "l       ^^"^•'  '   -""''  ' '  ^~''^''"  ^"'^^'^•■"'  Cat.  Dipt.,  12:J;  Scbiner,  Verb.  Z.  B.  Ges., 


vii,  ;{l(i;  Fiiiina  Aiistr.,  i.  ;U0. 
Scwva  rihcHii   l"al)riciiis,  Aiitl.,  '24>i,  1;  Fallen,  Syrpb.,  40,  6;  Zotterstedt,  Dipt. 
„       Scand.,  ii,  707;  ildd.,  viii,  :!1;W. 
^^-.Syrphii.i  reciiis  Osteu  Sackcn  (uon  Xovicki),  Proc.   Bosl.  Soc.  Nat.  Hist.,  xviii., 

"^f  Sijrpluts  ])ltil(i(Mi)hi('un  Maciiuart,  Dii»t.  Ivxot.,  ii,  2,93,  11;  tal)..  xvi,  fig.  2. 

/af.— Eurojie,  Atlantic,  Middle,  and  Pacific  States! 
Ip  .  Length,  7  to  12""".     "  $  .    p:yes  glabrous;  hind  femora  yellow, 

^vherein  they  ,i>™*^^^*^  '^  ^*^"^^^"  '''"^'  ^^^^^^*^  ^^^^  ^^P- 

i .  Eyes  glabrous;  hi'ul  femora  black,  except  the  tip. 


worth  noticing 

White  Mouiitii: 
h  this  descripti 
r,  the  first  aiid- 
female  from  ^\  r 

specimens  li:iv 


■-■>'' 

4i 


fS 


BULLETIN    31,    TNITED    STATES    NATIONAL    MUSEUM. 


•■  ( 


(    I 


m 


I'.i 


.1  '■  I 


M 


!■)       Ii' 


I  ,; 


Female.  Very  like  tbe  female  of  S.  torvua;  the  differences,  as  git  Iq 
above,  coiusist  in  the  entirely  glabrous  eyes  anil  the  femora,  whicli  |g  ^itX 
yellow  from  the  very  base  (coxa^  black);  in  niost  si)ecimcn8  tliolifeoei 
femora  have  a  brown  rinjj  before  the  tip.  j  im^ 

The  si/A',  as  well  as  the  shape,  of  the  abtloniinal  stripes  are  very  v;i;the  E 
ble  (the  female  of  »S\  torrus  shows,  in  both  respects,  much  less  variati  the  ai 
lietween  tlu^  followinjr  two  extremes  all  intermediate  stajjes  occuv,  bandc 

(1)  The  smallest  specumens,  from  7"""  upwards  in  length,  havtrowly 
yellow  stripes  on  the  third  and  fourth  segments  (piite  straight,  tidclose. 
tenuated  before  coming  in  contact  with  the  lateral  margin;  theirltennie 
borders  show  no  perceptible  convexity  or  concavity ;  such  spccin  that  t 
usually  have  a  distinct  brown  ring  on  the  hind  femora,  a  little  ))•  Osten 
the  tip.  S.  rib 

(2)  Larger  specimens,  up  to  11  to  12"""  long,  have  the  stripes  diuona  ] 
third  and  fourth  segments,  with  a  distinctly  biconvex  hind  margin,  which 
a  sinus  in  tlie  middle;  these  stripes  are  distinctly  attenuated  on  men  ft 
side,  before  reaching  the  lateral  margin.  Such  large  specimens  Ijlaok; 
have  no  brown  ring  on  the  hind  femora.  jncts; 

Male.  Differs  from  the  female  in  the  femora  being  black  at  I 
the  four  anterior  ones  for  about  one-third  of  their  length  ;  the  hind 
altogether  black  or  brown,  except  at  the  tij).  The  majority  of  tlic  s 
mens  before  me  are  of  medium  size  (about  8  to  10"'"').  but  some  In 
ones  also  occur.  The  shape  of  the  yellow  bands  does  not  vary  as  iiiiii 
in  the  female ;  they  are  always  attenuate<l  at  both  ends  and  bicn: 
posteriorly,  with  a  siims  in  the  middle.  The  altogether  glabrous 
easily  distinguish  S.  n'hcsii  ^ ,  from  S.  torrus  i  ;  in  other  resjjccts  >6r),  E 
look  very  nuu^h  alike.     The  average  size  of  ^.  ribcsii  <? ,  is  a  littlesm,  <^»  ,» • 

Minor  differences  between  .V.  tornts  and  S.  rihesii,  available  foi  '^T  «' 
sexes,  are:  neeyef 

(1)  The  face  under  the  eyes  is  altogether  yellow  here ;  there  is  uo;^''®'** 
ish  spot,  as  is  always  visible  in  .S'.  torrus.  ^^  ^ 

(2)  The  sides  of  the  face  in  S.  tor  run  are  beset  with  very  distinct  w'**'^*? 


lyiplm 

Sc 


ish  pile;  in  aV.  rihesii  this  ]>ile  is  of  a  pale  color,  and  almost  impen 


abeeec 


ble ;  hence  the  face  looks  smoother.  ^nt^n 

(3)  The  antenna;  are  less  dark,  more  reddish  in  iV.  ribesii.  ^^^^ 

(4)  The  scutellum  is  of  a  slightly  purer  yellow.  rcnifi 

(5)  The  four  anterior  tibiae  are  less  brown,  more  reddish,  espec^'^ffP* 
on  the  first  joint.  "*^* 

(G)  The  contact  of  the  abdominal  yellow  spots  and  bands  witlP*®**!** 
lateral  margins  is  slightly  broader  in  /8.  ribesii;  hence  the  yellow^"*^**' 


longation  or  neck  of  the  spots  on  the  second  segment  is  broader, 
consequently,  seems  to  be  shorter. 

(7)  The  stigma  of  the  wings  is  much  paler,  yellow  rather  than  br 

(8)  The  metallic  green  thorax  is  somewhat  more  shining,  loss 
than  in  8.  torvus  ;  in  many  specimens,  however,  this  difference  is  sca:^ 
perceptible." — Osten  Sacken,  1.  c. 


QdUa 
a>I,  pro 
inches 
lenti  1 
ften  in 
ttenoa 


f    S 


\^  U 


MUSEUM. 


SYNOPSIS   OF   NORTH    AMERICAN   SYRPlIIUiE. 


79 


Serences,  as  giv  ]n  coinpnrisoii  of  o  large  number  of  apeciniens  from  the  Ea«>t  there 
femora,  which  |a  Mttle  additional  worthy  of  note,  except  that  rarely  the  tubercle  of  the 
|)ecimen8  the liftMjels  distinctly  brown.    From  WushinKton  Territory  and  California 

I  have  eight  females  that  do  not  «litler  in  anything  that  I  can  see  from 
pes  are  very  vn  the  Eastern  specimens.  The  bh-ck  of  tlie  front  extends  down  nearly  to 
nch  less  variat;  the  antenna-,  the  femora  are  wholly  yellow,  and  the  alMbmiinal  cross- 
»,  stages  0(!cuv,  bands  reach  quite  to  the  latcrid  margins  of  the  abdomen,  though  nar- 
1  length,  hiivf  Towly  so  as  in  our  Eastern  forms.  From  S.  opinator,  which  is  very 
te  straight,  no' close,  tl'c  latter  character,  and  the  lower  part  of  the  front  above  the  an- 
inargin;  thoirltenntB  not  being  yellow,  are  the  chief  difterences.  It  is  very  possible 
V  such  spcciii  that  these  females  may  Ix'long  with  the  males  describe<l  by  liaron 
nora,  a  little  ht  Osten  Sackeii  as  S.  proiritm,  which  ditier  chietly  from  the  males  of 

8.  ribeKii  in  the  femora  not  being  black.  From  ■Montana  and  Ari- 
1  the  stripes  on  Bona  I  have  examined  a  number  of  specimens,  b<>th  male  and  female, 
X  hind  margin,  which  undoubtedly  belong  to  .S'.  rihcuii.  A  single  small  male  speci- 
iittenuated  on  men  from  Northern  California  has  the  cheeks  and  a  broad  facial  stripe 
•ge  specimens  I  black  J  the  yellow  on  the  sides  is  also  obscure.     It  may  indicate  a  dis- 

•jnct  species, 
eing  black  at  '•  5y,p||i,g  torvus. 

igtli ;   the  hind  gca-m  inpimia  Zetterstedt  (iioii  Mfigcn),  Dipt.  Lapp.,  591*;  id.,  Dipt.  S.  and.,  ii, 

lajority  of  tlu's;       f     723;  iuid.,  viii,  3i:$;»,  ac. 

'..$!/rj>liii8  io,iiiniiis  Wallii'r,  IJst,  <'te.,  iii,  582;  ScliiiH-r,  Vi'i'h.  Zool.  Bot.  Oj'h.,  vii, 

:{IT;  I-'iiuiia  Aiislr.,  i,  :i04  ;  StacfjiT,  Bon.sdorf,  Malm,  etc. 
,0>irpluis  linriis  Csteii  Saskcii,  I'r(»c,  Host.  Soc.  N.  II.,  xviii,  139  (Ir*"."!). 

HaXntat. — Atlantic  States,  Washington  Territory!,  Greenland  (Stae- 


"'),  but  some  b: 
i  not  vary  as  nuir 
ends  and  bicn: 
rether  jihibron 


II,  av 


'  other  respects  'er),  Europe.  Siberia  (auct.). 

ii  '^ilittlesni    ^»  8.  Length,  10  to  iL'.o""".    "Female.   Face  and  cheeks  yellow,  with  a 

'    'liViblc  foi  ■©ry  *^iy'''t  bluish  retlection  ;  a  faint  grayish  si)ot  on  the  cheeks,  under 

he  eyes;  oral  border;  in  the  middle  of  the  notch,  usually  slightly  brown. 

ii    ««icnr,r^ntand  vertex  greenish  black  ;  the  former,  on  both  sides  along  the 
pre;  tuereisuop        .  "^  '  '  ^ 

r     '  yes,  with  a  broad  border  of  yellowish  pollen,  almost  meeting  the  similar 

,..•  ^1,1  order  of  the  opposite  side.     Eyes  pubescent  (in  many  specimens  the 

Li    1        +  imnen''*^*®'*®"^^  is. very   much  rubbed  off  and  very  difficult  to  perceive). 

intense  inserted  on  brownish-yellow  ground;  the  dark  color  of  the 

..     ..  rent,  begins  immediately  above  their  root,  forming  a  blaokishbrown 

'  roh  with  a  projecting  angle  in  th3  middle.   Antennre  dark  brown ;  third 

1  V  I    esnec'**^??*'  joint  more  or  less  reddish  below,  sometimes  altogether  dark 

'         towa.    Thorax  greenish,  with  but  little    luster;    in  well-preserved 

,       ,    mpedl^ens  a  faint  tinge  of  a  geminate,  grayish,  middle  stripe  is  percep- 

^^     til    vellov'^^*"^®"^'^'^'  scutellum  dull  yellowish,  with  a  slight  bluish  reflection 

'^^  .  .    ,.„„.i..,  nd  Wack  pile.    Yellow  spots  on  the  second  abdominal  segment  ellipti- 

a>l,  prolonged  usually  as  a  narrow  neck,  which  reaches  forward  and 

i.1    „  K,)nol||n  the  margin  ;  the  yellow  cross  bands  on  the  third  and  fourth  seg- 
w  rather  than  l)r~;w:  xi    u-  i-    i  -.i  i    ., 

"*"~*****ave  a  very  gently  biconvex  hind  margin,  with  a  very  shallow, 

distinct,  sinus  in  its  middle ;  on  each  side  the  cross-bands  are 

ted  and  curved  forward,  so  as  to  reach  the  anterior  margin  of 


»re  shining,  les'^ 
difference  is  Rca:' 


hi 


«;' 


m 


til 


III 


II 


don 

I   C( 


80  BULLKTIV   :il,    rMTKD   STATKH   NATIONAL   MUSEUM. 

the  fu';;inent ;  tlio  blaiik  iiittTvnl  'x'twiK'n  the  8tri|M's  is  twice  as ! 
as  tlic  .stri|><'s.  Koiirtli  and  liftli  f.c^fnu'nts  with  yt'llow  posterior  iiiai, 
th«^  linii  usually  witii  two  vcilow  spots  ou  «'a<'h  side,  at  tiu^  base,  i 
and  basal  tliir<l  oi'  Ifuiora  blacii  ;  on  t!i<>  bind  pair  the  blacli  rciicln  A^m  t 
yond  tlic  niichUe  of  tht*  b'niora  ;  iiiud  til)ia^  often  with  a  biownish  O^O-** — 
four  anterior  tarsi  brown,  the  root  of  tiu'  lirst  joint  often  re«hlisli;  Ban 
tarsi  darlv  brown.  IJoot  of  the  win;;s,  as  far  as  the  humeral  cross  *  8p«c 
slifihtly  brownish,  or  yellowish;  costal  cell  almost  hyaline;  sti^'miihr    '^^o 

"Male.  Similar  to  the  female,  but  abdomimd  (iross-bands  liiu'P®*'*  ^ 
the  bi(!onvexity  on  their  hin<l  side  stronf;er,  and  the  sinus  in  the  in'*'  ^^^ 
deeper;  the  {^ray  spot  on  the  cheeks,  under  tlie  eye,  often  h'rger. -jy^^, 
times  occupyinj;'  a  considerable  portion  of  the  cheek  ;  the  brown  ri.  ^(. 
the  hind  tibiie  usually  exi)anded.  so  as  to  reach  the  tip  of  tliei  811 
The  eyes  are  more  distinctly  pubescent;  the  front  ia  beset  with  v  Sy 
pollen,  except  a  narrow  black  space  above  the  antennae.  Habi 

"  In  drawinjiup  the  des(!ription,  I  had  a  large  number  of  speciiiiti  "3»  5 
fore  me.     Amonjj  them  was  a  lot  of  twenty-three  males  and  tliirtiolor  Oti 

females,  caught  by  ]\Ir.  IJ.  I*.  Mann,  on  the  7th  of  duly,  1.S74,  all he  dia 

the  same  spot,  in  the  subalpine  regions  of  Mount  Washington,  /vnoeng  tl 
lot  of  twenty-seven  iiuiles  and  twenty  females  was  collected  by  Mi,*hi  n>o 
lisoii,  also  in  the  White  Mountains.  Other  specimens  were  from  .\®^<li«h 
achusetts,  IMaxle  Island,  Canada,  the  Kocky  Mountains  in  CoIilacWsli 
etc."— Osten  Sa(!ken,  1.  c.  rasiy-i 

From  an  examination  of  a  large  series  of  this  species  coUeJtted  ii^^S®*  ol 
Whirc  Mountains  in  company  with  numerous  individuals  of  A.  i^®**'^' 
(July  li.V.'iO),  with  others  from  various  localities  in  the  East,  the  )l^  O^^-f' 

iree»n 
lem;  tl 


St'ttcs,  Washington  Territory,  etc.,  I  find  nothing  worthy  of  add 
the  above  full  descrii)tion. 


arkedl 
inds  d( 
le  sides 


Syrphus  Leaueurii.     (Pluto  IV,  lig.  "-i.) 

>//>7>/(M8  Lesiteitrii  Mat'qiiai't,  Dii)t.  Exot.,  ii,'J,92  (ft.'iiialf) ;  Ostcii  Sac 

tJd.Nt.  Soe.Nat.  Ili.st.,  xviii,  141!. 
I'-piHlrnphc  iviiJutKjciia  Walker,  Dipt.  Sauinl('r8.,24'^;  tab.  vi,  111^.5  (male)    OftHttlO 

Hahi fate's (i\y  England,  Washii.gton  Territory  !  't^  segi 

"  5  ,  ? .  Length,  12  to  lo""".  'Larger  than  S.  torvus  and  with  aL"**"  ^^ 

narrower  abdomen  ;  in  the  female  the  abdomen  is  a  little  broadir**"  **■" 


less  broad  than  in  the  allied  species.    The  yellow  face  has  a  browi 


Fenuih 


breviated  stripe  in  the  middle  (sometimes  wanting);  the  autcmi-     **  * 

uniformly  black.    Eyes  bare.    The  yellow  spots  and  cross-bands  1®^**" 

abdomen  are  straight,  and  reach  the  sides  of  the  abdomen  with^  "^^ 

full  width  ;  the  yellow  has  a  bluish  reflection  (seldom  in<listinct);  i™®**%ttl 

male  the  baud  on  the  third  segment  has  a  sharp  triangular  nGtclji;"^®'*:^' 

middle  of  the  hind  margin,  which  does  not  exist  in  the  female;  '.r^]r^ 

and  fifth  segments  often  have  a  greenish  reflection,  and  are  niai;  ^'^' 

with  yellow  posteriorly.    The  femora  are  black  at  the  base,  tin °^^^° 

tibial  have  a  disiinct  brown  ring.    The  wings  usually  have  u  di;    ^^* 

yellowish  tiugc.  '''    \^ 

ogethe: 


f     i| 


MUSEUM. 


iH  tw'u'i'  lis  ' 
•  posti'rior  iiiai 
it  the  biisc.    I 


SYXOPHIS    oK    NORTir    AMKRICAN    SYLTIIIIM:. 


81 


ftonif  liilf  spcciliM-lis  t»t  Ixitli  sixes  iilc  only  N' \**Uii, 

u  Tiiy  i»n««-.    '     '  coiiii'iiiv.l  iilM.iit    iiiiM'ty   miilf  ainl   fciimh'   spi'ciiiu'iis,   principally 

i.i,.,.i.'J...„.i  flfom  tln'  Wliilf  Moiiiitiiiiis;  iilsd  Irniii  Miiinr,  Massaclmsrtls,  New  York, 
t<  i)ia(  iv  ii'<i(ii>**^ 

hiihn)VVliisl,:etO.''-<)slciiSack.Mi.  1.  r.  ,  ..        , 

iltcn  ivdtlisli-     Baron  Osii'n  Sii.kcn  ciaild  see  iiu  <lin('r('ncf  lu'twccn  .s.  Icxucnni  and 
Imiut'ral  ta  ),sv»»P««'"""  "'"'"  ''"'"I"'  h\ho]vi\  "Silesia,"  whicli  In- coinpaird. 
V\w  Kti'Mniilit     '^^^  IVinalc  spiriincns  IVoin  Wasliin-ton  'IViritoiy  a«;m'  in  cvoiy  re- 
bands  Uio'P*®*  ^^'''''  "'""^''•'"•^  spccinH'iis  wliicli  1  liavj'  iKtin  Mount  Wasliingtom 

•,..,u'i,.  f»i<.  „  In  on«  tilt'  alidoMiinal  (•ro.s.s-l)ai..i.s  uiv  sti'onjiiy  bluish. 

SlllllB    111     III'      III 

,  often  larger,  iyrpkua  abbieviatus. 
:  the  brown  ri 


he  tip  of  the 
a  beset  with  \ 
ince. 

berof  .specinu' 


Sciira  iihhnritiid  Zi  I  tc  rstclt,  I  »i|it.  Scand.,  \  iii,  lillKi,  i:!  i  foiiiulo)- 

$yriilii(x  I.II  imin  >^(h\t\rv.Vii\\i\,{  Aiisti.,  i,  :!1 1  ^iii  pail). 

Syriiln,.'  (ihbni-'itilitH  Osttii  SarUcii,  I'hm'.  |5(isI.  Sue.  Nal.  Iliftt.,  xviii,  144. 

Eabitut. — Conneeticair,  Mas.sa. hu.setts I,  Kuropc. 

"*»'•  I-engtli,  about  S""".    Male.    Face  yellow  ;  cheeks  Ida*  k,  which 

lales  and  tliiitiiOlo' 'DoalcsceM  witii  the  brown  oi-al   bordeis,  and   i.s  connected  under 

lulv   1<H71  aim  he  dral  openiuf;- with  the  lilacU  on  the  oppo.site  side :  in   some  speci- 

hin"ton.     Aliens  the  laciiil  tubercle  is  also  brownish;  third  antennal  Joint  brown- 

11 'cted  bvMi  *h>  more  or  less  reddish  on   the   under   side,   soinetiines  altogether 

MIS  were  from  .^^^'^^'h  '    front    yellow;    no   brown   spot  above   the  antenna-;    vertex 

^  .;.>o  ill  r\,i,lacki8h  bronze   color.      Eves  bare.      Tlioiaci<'  doisiiin    rather  bright 
inTaiiis  III  v^iiiii, 

rassy-green.      Yellow   sjKits   on   .second    ;'l)doMiiiial    segment    rather 
'■ 's  collected  i^'*ff®»  ^''''''l'"''^  triangular,  touching  tlu'  niaigin  with  the  apex  only; 

•    •  1  .„'  ,  .a-    V  ,ie  interval  between  them  moderatelv  broad,  eiiiial  to  about  one-third 
iviuuais  oi   »>.  I  •  ' 

L.   ,  i,^,.^,*.  t]^.  y,P  0110-foiirtli  of  the  breadth  of  the  spot;    yellow  bands  on  segments 

ti  .,  ,J  .wiait  ire©  ^nd  four  rntiier  bi-oad.  much  broader  than  the  black  band  between 
oriliv  01  cUKiii 

lem ;  th«i  jiosterior   margin   in  both   is  sinuate  in   the  middle,  more. 
arkedly  in  the  band  of  the  third  than  of  the  following  segments;  the 
inds  do  not  reach  the  abdominal  margin,  and  are  cut  off  obliquely  on 
.);     !,  (Ml    '"^  "  ,e  gidtei^ ;  the  distance  of  their  anterior  corner  from  the  magin  is  very 
•  li.r  .^(iiiali)   [>ftH,however ;  fourth  .segment  with  a  nariow  yellow  border  jtosteriorly; 
th  segment  yellow  with  a  small  transveise  black  sjtot  in  the  mithlle, 
•  nd  with  a'^*^  *^  base.     Legs  yellow,  but  base  of  all  the  femora  black  ;  on  the 
v'ttlo  broaiU'i^^ '*''**^'^'^  ^^'*^  black  occupies  ono-tiiird  or  one-half  the  femur. 

1  „o.  r.  lArnui^^naftlc.  Resembles  the  male,  but  with  the  following  dillerences  :  lower 

ace  has  fi  uu)»l       j»  '  '^ 

.  tl  p  anteinr'''^  ■  '  *'"""^  above  the  antenna?,  yellow;  upper  part  and  vertex 
1  '•  ■  •  -  bands  1 1*""'*'^  green ;  oral  border  less  infuscated,  the  infu.scation  being  usually^ 
abdomen  witlr 


a 


ji|3tinotin  the  middle  of  the  excision   only;  the  yellow  spots  on  the 

V  fin<.f\.  "<*nd-*lbdoininal  segment  are  larger,  tlie  interval  between  them  imr- 

1  •   „^f,.i,r'''®i*.®ften  linear,   sometimes  obsolete;  the  bands  on  the  third  and 
angularnotcui     .»t  ' 


n  the  female;  t> 
n,  and 


are  mai: 


^ments  are  comparatively  narrower  than  in  the  male;  and  but 
lader  than  the  interval  between  iiem;  their  hind  margins  are 
.      I  ^ji^.atlyf|Boncf.ve-sinuato  in  the  middle,  and  convex-sinuate  each  side; 

11      1  '„,.'.!  ,11.*^  hiiD<i«  distinctly  reach  the  iiVubuninal  margin;  fifth  segment  vel- 
■  «',  Wftti  a  triangular  black  spot  in  the  middle  ;  coxa*  black,  but  femora 

ogetiiier  yellow  (the  four  anterior  femora  in  t:ome  specimens  are  black 


■»?■ 


I  )4     >l  I 
•  I' 


I  > 

i  'l: 
i'  *'■ 


V, 


'(I'; 


r 


i::l 


:•  Ki 


1/   <. 


I':  {• 


82 


BULLETIN    :n,    l/NITED    HTATKS    NATIONAL    MUSEUM. 


at  the  cxtrnijo  base  only);  tlir  liiiid  r«'moraiir«(  altoK»'tlu'r  yellow,   p^n.^, 
ditluriii^^  widely  IVoin  ilios(^  ortlic  tiiaU'.  the e.> 

Tlinu^  male  and  six  tciiialf  .sptcitiu'iis,  nil  IVoiii  MassacliUHettM.  ring  it 
A  pair  (S  ,9  )  <>!'  Kiiidpfan  s])rciiii('ns  ohtaiix'd  Ironi  Dr.  Schiin;  tiUm 
exactly  niiiiilar  to  tim  Aiiu'rican  spcciiin'iis;  tliey  also  show  nil  ji^j 
sexual  tlint'n'iiccs,  as  explained  above.  Zett('rstedt'sdeseri|)ti»»n  ;i;  eaoh  a 
very  well  with  niy  feniah'  speciinens.  In  my  repoit  on  the  Dijiii  anddii 
C()lora<lo  Territory  (IJ.  H.  (leol.  and  (U'ofjr.  Snrv.,  ete.,  by  V.  V.  ]h  they  >i 
for  1S7."»,  p.  r>(!4),  1  nu'iitioned  !<.  corolla'  as  oeiairrinj,'  there.  I  \v,h  tbetbi 
taken  in  this  determination  ;  the  specimen  is  more  like  S,  nbhnr  leaoenl 
althoM;ili  I  would  not  without  further  proof  identify  it  ev«'n  witi  coale8< 
speeies.'' — Osteii  SackeuJ.e.  The  fo 

Four  male  sjieeimens  from  Connecticut  and  Massachusetts  nsaalh 
throughout  with  the  above  full  description;  the  se(;ond  alMlomiii:il  the  ba.> 
in  one  does,  however,  distitu'tly  attain  the  lateral  mai';;in  of  the  sc.  Htthi 
in  front.  I  have  a  male  and  a  female  si)ecimen  of  N.  corolUv.  ircVjrgfDJ 
from  ^Ir.  V.  1\I.  v.  d.  Wiilp,  tlu'  male  (»f  which  does  not  showanvi  oommo 
enco  that  I  can  see  t'rom  my  specinu'iis  of  S.  ahhrcriafun.  and  ei^ 

Syrpbus  Amcricanus.  j      L 

SjjrphuH  .lHiericn»iM«  VVifdiMiiHini,  Aiinm.  Z\v.  Iiih.,  ii,  ViO,'i'i;  Oaten  Stukti,  ' 

HoHt.  ScM-.  Niit.  Ili.st.,  xviii,  I'l.-..  •'*•*  •nt( 

JTahitaf.—^L'W  England,  Montana!,  British  Possessions,  New  ^®**'*"* 
Delaware,  Virj^inia,  Michijjtan,  Texas.  n£(Or 

B,9.  Length,  9  to  lO""".  " Fonuile.  Fac«'  yellow,  often  '"■"  '^^V'^" 
with  n  hroivn  stripe  in  the  nnddle,  which  bej^ins  at  the  oral  mar;:!'  P**""'*' 
does  not  reaith  the  antenna';  the  latter  brown,  reddish  on  the  iiml  ^,/f" 
of  the  third  joint.     Cheeks  blackish;  hut  seiuirntnl  f'roin  ^//f  ;;/'(•/  ^*, 

IfiflM  All  I 

narrow  yellow  border,  which,  on  the  underside  of  the  mouth  con '  , 

cuts  off  the  connection  between  the  black  color  on  Iioth  sides.    '      .  fl' 

brownish  bronze  (iolor,  jiowdered  with  yellow  on  each  side;  (Ik  ' 


l)art  of  the  front  is  more  or  less  yellow,  but  immediati'ly  abovi 
antenna  there  is  a  brownish  sj)ot,  which  soiiu'times  coalesces  wi 
bronze  color  of  the  upper  front ;  vertex  bronze  color.     Eyes  biui 
first  abdominal  cross-band  is  not  interrupted,  but  coarctate  in  tL 
die;  its  ends  do  not  touch  the  niargiu  of  the  abdonuMi,  hut  are  scp 


from  it  by  a  narrow  black  border;  (sonu^times  a  brownish  mark     .. 


nordiui 

md  ae^^i 
he  blac 

hesesr 
•ral  giai 
aotwitl 


•e: 


heeki, 

ana|gr( 
rati(ei 


middle  of  this  band  gives  it  the  appearance  of  being  subinten 
The  second  cross-band  is  nearly  as  broad  as  the  black  cross  ha 
tween  it  and  the  next  yellow  band;  it  is  usually  i)erfectly  stnii; 
some  specimens  the  hiud  margin  is  gently  sinuate) ;  its  endsi 
touch  the  lateral  margin  of  the  abdomen ;  they  are  cut  obliquely, 
ing  a  sharp  angle  anteriorly,  and  a  rouiuled  one  posteriorly  ;  tlioi'^IJltt* 
almost  touches  the  margin  of  the  abdomen.    The  third  band  is<        %rj> 
to  the  second,  oidy  its  hind  margin  is  more  percei)tibly  arcuatiMl   ^Oi^ta 
posterior  margin  of  the  fourth  segment  has,  as  usual,  a  narrow    "(^|  9 
border;  the  tifth  likewise,  and  two  yellow  spots  at  the  base  1  i**e©l»,  a 


MUSEUM. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIID.K. 


m;j 


{I'tlier  yellow,  p^^toia  .vcliow;  tin*  four  antriior  oiu-h  in  soiiit'  spooiiiieiis  hrowiii.sli  at 

the  extrciiic  haisu  only  ;  tlu;  hind  pair  w  itii  a  iiioiu  or  \vnn  (liHtiiirt  brown 

ssachuHetts.     ring  on  tlu' ilLstal  half;  four  antt'rior  ti()i!i-  anil  tarsi  .yellow ;  the  liind 

ni  Dr.  Schiiii:  tIbUBNonictiiiM's  with  a  Im-o  "  ninh  riii^;,  tlit'liitHJ  tarsi  hiownish. 

also   show  ill       Male.     I'ront  yellow,  with  a  mo  c  or  less  distinctt  hiown  spot  a!>ov« 

uleseriptioii  ii;  each  antenna  ;  erosshanils  on  the  alxloinen  Itroailer  than  in  the  female, 

on   the  Diiib  anddistinetly  Itroader  than  the  lilack  inteivnl  het  wi-en  them;  posteriorly, 

!.,  hy  !"\  V.  ll;i  they  iire  often  nearly  straij'lit,  sometimes  distinctly  jircnate.  »'s[ie(!ially 

J  there.     I  wi-  the  third  hand.     The  yrllow  spots  on  the  second  si'jjment  are  not  eoa- 

likp  S.  nhhrir  leioeDt,  hnt  sepa'ated  hy  n  luiirow  black  interval  (in  some  specimens  snb- 

ry  it  even  witl  coalesceni) ;  the  ;.'''li  seynienl  is  yellow,  with  a  black  spot  in  the  middle. 

The  foni-  antericr  lemora  are  bhuik  at  the  base;  tli«'  hind  femora  are 

iissai^hnsetts    asoally  bhick.  witli  a  yellow  tij);  s(»nietimes  there  is  a  traceof  yelh)W  at 

)iid  abdomiiia!  the  base;  hind  tibiic  nsnally  with  a  brown  lin;;  in  the  middle. 

r^iin  of  the  sc:     Habitot. — Ibifisli   j'osscssions,  New  Kiifiland,   N«'W  Yoik,  Delaware, 

N.  cor<>//a'.  Ill  Virginia.     In   l)«'troit.  Mich.,  in  Anynst,  I   lonnd  this  to  be  the  most 

not  showanvi  oommon  species.     It  seems  also  to  lu;  common  iii  Texas.     Sixteen  males 

UltHH.  and  eight  lemales. 

8,  amerivanun,  ?  ,  dill'ers  from  S.  nhhrfrhttiis,  9  ,  besides  Iwiufi  lar}>er, 

-  in  the  presence  of  a  brown  stripe  in  the  fac«',  and  of  brown  spots  above 

'  the  antenme;  in  the  spots  ot  the  second  segment  beinj;'  altojjether  <'oii- 

Jesoent  (instead  of  narrowly  intermitted);  in  the  cross-bands  not  toiidi- 

ing  (or  hardly  tonchinj,')  the  abdominal  nniryin,  while;  in  S.  ahhreriafnn 

,      the  contact  is  broad  and  distinct  ;  in  tlu;  cross-bands  beinf-'  (in  nmsr 
low,  often  brov  ....         •        ,  .    •     i 

'       ,            jpeoinaens)  more  straiL'ht,  less  sinuate  i)osteiiorlv. 
the  oral  mar;.'!' *„  _ / ,     ,7,,.  .    ... 


sessions,  New 


lisli  on  tin'  mil 
1  from  the  won 


8.  ainctintnus,  S  ,  tlillers  from  *S.  uhhrcritttuN,  i  ,  besides  bcinj;'  lar;;er, 
jy  the  brown  stripe  on  the  faiu",  the  more  strai;;lit  second  cross  band 


ic  numtli  coll  1 
n  both  sides. 
iU'li  side;  tin 

i'diately  abnv 
■s  coalesces  w  ■ 
)r.     I'^yes  biin 

loarctate  in  tl; 


leas  ainuate  posteriorly)  and  by  the  coloring  of  the  liin<l  femora,  in 
ihoaeapecitnens  of  .v.  rf/w^>w'6'«HH.v  which  have  the  hind  fenioia  iiltogetlier 
jlaokiBh,  the  yellow  space  at  tlu'  tip  is  narrower  than  tlie  yellow  s[)ac6 
n  ordinary  specimens  of  S.  abbrev'uttm,  $  .  The  yellow  spots  on  the  see- 
mdaeguJent  (in  all  my  <f  specnmens)  do  not  touch  the  lateral  margin; 
ho  bUick  interval,  although  small,  is  <listin_ct;  in  all  my  <i  ahln-evinlits 
hesO'  spots  distinctly  (tome  in  contact  witli  the  lateral  margin.     The 


•ralnargin  is  not  infuscated  here  (except,  of  course,  at  the  point  of  eon- 
act  With  the  facial  brown  stripe).  Attention  should  also  be  paid,  in 
ownisii  l.ln.l^  ^^^  i^xes,  to  the  ditlerence  in  the  extent  of  the  black  coloring  of  the 
ng  subinteiMij^^jj^^  .^^  ,lcscribed  above."— Osten  Sacken,  I.  c. 

black  cross  u   ^,jumi,^.j,  „,•  speciuuMis  from  New  England  and  four  (3,5)  from  Mon- 
perfectly  '^"•"i- ana  agree  throughout  with  the  preceding  description.    The  front  above 
te);  its  en.ls.^  ^^^  narrower  than  usual. 
I  cut  obliquelv, 
steriorly;  tlioi'y»I*Mopinator. 

bird  band  i^^         mfrjih hx  ophmlor  Ocirv  Sacken.  AVcstcrn  Diptoni,  :V27, 1877. 
tiblv  arcuati'il   -fliflll»<«^— Washinjiton  Territory,  California,  Oregon  ! 
ual,  a  narrow    "  ^  (  2  •  l-cn-t  h,  !» to  11""".    Male.    Kyes  glabrous;  face,  including  the 

at  the  base  liitieelUf,  altogether  yellow  or  reddish  yellow;  no  brown  stri^ie  on  the 


84 


lUf.l.KTIN    111,    UNITKD    STATES    NATIOXAI-    MUSKUM. 


V  •\i: 


;''■^^ 


I      f: 


liiciiil  liil'fii'lt':  iiiitciinji'  l)nt\vii,  it'ddisli  on  llic  iiiuler  .side;   IVoiit  iilmv 
tlic  Miitciiiia'  yellow,  tlic  ;iii;ilt'  itt'twei'ii  tlie  civcs  jjjrct'iiish  bhick.  Vflli, 
isli  pniiiiosc,  l)i'S('t  with  black  liiiir;  small  hiowii  marks  alK»V(^  the  root, 
tlu'  antiMiiia'-.     Tlioriix  iinitallic  l»luisli-}>ivcn,  densely  hestt  with  vtlln 
l>ilf;  the  broad  j^cnimate,  firayisli  stripe  in  the  iniddli*  is  snboljsoic 
Sciitellum  yellowisli  metallic-opalescent,  b»'sel  with  black  i)ile.     Alii 
men  black,  opa(iue  on  the  anterior,  siiboiiacpie  on  the  posterior  part 
the  segments;  the  two  yellow  spots  t)n  the  second  sej;itieiit  are  prol()ii;'e 
anteriorly,  so  as  to  rea<'h  the  lateral  margin  of  the  seijinent  at  its  a 
terior  corner ;  the  two  other  cross-bands  aie  rather  narrow  (not  inn 
bioader  than  one-fourth  of  the  breadth  of  the  se}j;nient),  atteiiuateil 
the  middle  (even  subinterrupted  in  one  of  the  specimens);  their  ends  a: 
►separated  from  the  lateral  margin  by  a  narrow  black  interval;  po.v;: 
rior  margin  of  the  fourth  segment  with  a  narrow  reddish  border;  that 
the  lifth  still  narrower.     Legs  reddish  yellow;  proximal  half  (or  iii';ii 
so)  of  the  four  anterior  femora  black;  hind  femora  black,  exceiit 
tip;  hind  tarsi  infuscated.     Stigma  brownish;   both  costal  cells  d 
tiiictly  tinged  witli  browi. 

Two  specimens. 

I'emale.  I  have  two  specimens,  which  I  n'fer  t(»  this  species,  on 
count  of  their  entirely  yellow  face  and  the  course  of  the  cross-baii- 
wliich  is  nearly  the  same  as  iu  the  males;  but  the  femora  are  entii> 
reddish  yellow,  coxre  and  trochanters  remaining  black.  Vertex  .yin 
isli  black  ;  front  metallic  green,  densely  yellowish  pollinose,  its  lo 
l)art  reddish  yellow,  except  two  brownish  marks  above  the  root  ol' ; 
anteanaj." — Osten  Sacken,  1.  c. 

I  have  examined  nearly  fifty  s])ecimens  of  this  si)ecies,  male  ami 
male,  from  California,  Oregon,  and  Washington  Territory,  which  ;i;:! 
closely  with  the  above  suflicieiitly  full  description.     The  yellow  cIht 
and  face,  bare  eyes,  and  the  second  and  third  abdominal  cross-bai 
not  reaching  the  lateral  margin  will  distinguish  the  sj)ecies. 

Byrphus  geniculatus.     (Plato  IV,  Wis,.  3.) 

Syrphus  geniculafiisMiicqwiirt,  Dipt.  Exot. ,  ii, '2,  101, '^4  :  tab.,  xvii,  fig.  5: 
tcuSai'kon,  Proc.  Bost.  Soc.  Nat.  Hist.,  IHT"),  ir>tl. 

Habitat. — Newfoundland  (Macq.),  White  jMountains! 

(J.  Length,  7.5  to  8™",  Eyes  bare.  Antenmxi  unusually  small  lo: 
Syrphus,  short,  third  joint  nearly  round  ;  black  throughout.  Facep: 
duced  downward  and  forward,  the  tubercle  prominent;  dull  yelloff 
on  the  sides  and  below  the  antennai,  b'lt  in  large  part  obscured  b; 
greenish-black  reflection,  the  yellowish  part  clothed  with  ,■  hitish  iioi! 
cheeks  and  lower  part  of  the  face  greenish-black,  extending  up  fiuH 
in  the  middle,  shining  on  the  tubercle.  Frontal  triangle  grei'iii' 
black,  thickly  (tovered  with  yellowish  dust,  and  with  long  black  \>. 
vertex  black.  Thorax  black,  or  dark  brown  with  a  faint,  giri'ii 
tinge,  and  with  lather  abandaiit  black  pile.  IMeurai  whitish  dii> 
aiid  with  light  colored  pile;  scutellum  obscurely  yellowish,  with  b!i 


dbli  b 


iiv 


ll 


SKUM. 


SYNOPSIS    OF    NORTH    AMEKICAX    SVRPIIID/E. 


85 


L' ;   front  iilmv. 
black,  .vi'lhii 
(ovc!  tlii^  root, 
ft  with  vclli 
iS  .sul>t)l)S()lf: 
k  ]»il«'.     Aliii 
)steii()r  l)iut 
t  are  j)r()l()ii;'f 
lu'nt  at  its  a 
row  (not  mil 
,  attenuated: 
;  their  ends  ii: 
nterval ;  \w>k 
border;  that 
half  (or  nc';ii 
ack,  ex(jt'i)t 
ostal  cells  d 


i  species,  oil 
he  cross-1)iiii'; 
ira  are  eutiu 
Vertex  .u'lVf 
inose,  its  lo' 
the  root  of ; 

!S,  male  and 
■y,  which  a:: 
yellow  cIhi 

iial  cross-bii: 
ies. 

b.,  xvii.fig.  J: 


lally  small  k 
out.  Fatei': 
(lull  yellow: 
t  obscured  b) 
hitish  iHiil' 
(ling-  up  fiut 
angle  grceiii' 
ong  bUick  Y- 
faint,  griH'ii 
whitish  »lii^ 
vish,  with  b!. 


lie.  Halteres  yellow :  tegu'..e  with  a  brownish  border.  Abdomen 
longate  oval,  black,  oi)aque,  only  .;  little  shining;  second  segment 
^ith  a  very  small  reddish-yellow  spot  on  the  sides  before  the  middle; 
Aird  and  fourth  segments  with  a  narrow  cross-band  near  the  front, 
Sroadly  and  rectangularly  interrupted,  touching  the  lateral  margin; 
iarrow  hind  margins  of  the  fourth  and  fifth  segments  and  anterior  an- 
pes  of  the  fifth  yellow.  Legs  dark  brown;  the  tips  of  the  femora  and 
iase  of  the  tibia'only  narrowly  and  obscurely  yellowish;  the  hind  legs 
lilid  all  the  tarsi  black,  the  hind  metatarsi  a  little  thickened.  Wings 
llbscjurely  hyaline,  the  stigma  only  a  little  darker,  all  the  veins  blackish. 
:  " Diders  from  S.  iiniheUatartnn  in  being  a  little  smaller  (about  1. ')""") ; 
liie  face  in  protile  is  much  more  i»roJecting,  tlie  facial  tubercle  a  metal- 
lic blackisiigreen,  which  color  extends  on  botii  sides  along  the  oral 
Hiorder;  in  the  other  species  the  facial  tubercle  bears  a  distinct  stripe; 
JS^  the  female  the  sides  of  the  face,  jiowdered  with  yelhnv  jyollen,  hav(^ 
# brownish-yellow  ground  color;  tlH>  antenna'  are  inserted  on  black 
"roinid;  the  front  in  the  female  is  brownish  green,  much  broader  than 
,S.  innhellfifdnnu  ;  the  i)ollen  on  the  si«les  is  much  less  thick;  it  fol- 
Ijpws  on  l;oth  sides  the  orbit  of  the  eye  t<t  al)out  one-half  (he  distance 
•Ifetwccn  till!  ocelli  and  the  antenna',  an«l  does  not  reach  as  nuich  tow- 
$||d.s  the  vertex  as  in  the  other  sjjccies;  it  does  not  form  a  well  delined 
'||fch  ;  the  glabious  space  above  the  antenna'  is  smaller.  TUv  tlioiax  is 
ilownish  green  (not  bluish  green);  the  s(!utelluni  has  a  strongci-  bluish 
itnllic  rcllcction  :  the  yellow  markings  on  the  abdomen  arc  somewhat 
krrower,  and  jjaler  yellow;  the  four  anterior  legs  are  of  a  darker  rcd- 
ih  brown,  sometimes  almost  black,  with  i)aler  knees;  when  the  legs 
l»alcr  the  base  of  the  femora  does  not  appear  al)ruptly  tinged  with 
ick,  as  in  S.  umhcUatanun.^'' — Osten  Sacken. 

}hus  iimbellatarum. 

/  Siiri>luiK  nmhcUalnrum  Sc'liiucr,  ]'"iiiina  Austr.,  i,  p.  307. 

''.  Siirphus  (jnttatux  Walker,  List,  etc.,  iii,  oSi). 

Siirphim  Ct-qitadrtihiH  Walker,  LJHt,  etc.,  r>e6. 

.■>///7>/(MN  iiiiilicnatnriim  Osteii  .Sacken,  Proc.  Host.  Soc.  Xat.  Hist.,  187."),  l.")l. 

ihitat. — White  INIountains,  New  Hampshire,  Arizona  I 
f,9.  Length,  8  to  9""".  Antennie  blackish  l)rown.  Thorax  shining 
llic  green;  pleura;  thickly  whitish  pollinose  and  with  whitish  i>ile. 
omen  subopaque  black,  with  three  interrupted  cro.ss-bantls,  about 
hird  of  the  width  of  the  segments,  situated  on  their  anterior  ])arts. 
^emale. — Eyes  glabrous.    Face  yellow,  with  a  whitish  pollen  almost 

icealingthe  ground  color;  in  the  middle  a  brown  stripe,  cr(»ssing  the 

Mid  prominence,  but  abrui)tlystoi»ping  before  the  base  of  the  antt'iiUie; 
stripe  does  not  run  down  on  both  sides  along  the  oral  margin  (it 

Bs  so  for  a  short  distance  in  a  very  few  specimens);  oral  margin  yel- 
as  well  as  tin;  (dieeks;  front  and  vertex  bluish  green  (not  brownish 

^eiO  ;  the  yellowish-gray  i)oIlen  on  the  front  forms  a  well-marked  arch, 
-interrupted  in  the  middle,  leaving   iiare  on    one  side  the  veitcx, 


I     I 


) 


i 


86 


BULLETIN   31,    UNITED    STATES    NATIONAL    MUSEUM. 


i; 


V      I 


t  fi 


on  the  otluT,  a  well  «U'flne(l  triangle  above  the  antenna.';  the  sk 
of  this  arch  run  down  along  tho  eyes  and  coalesce  with  the  facial  j)oll, 
antenna?  inserted  on  brownish-yellow  ground;  thorax  bluish  grtr 
scutelliun  dull  yellow,  brown  at  the  exti'enie  ends  on  eiich  side;  it> 
doni  shows  any  trace  of  a  bluish  metallic  reflection  ;  the  four  front  li, 
are  .'eddish  yellow,  femora  black  at  base ;  tibia?  with  a  trace  of  a  bio\> 
ish  ring;  tarsi  brownish.  The  abdominal  cross-bands  usually  reach  t 
lateral  margins  of  the  segments,  but  quite  often  they  stop  a  little  d 
tance  before,  leaving  a  narrow  black  border  between  ;  their  color  isn 
ish  or  |)ure  yelic^w,  with  a  more  or  less  (li«^M«<.t  whitish  i)ollen,  wbi 
often  gives  them  a  whitish  ai)pearance. 

Mnic. — The  face  often,  not  always,  has  a  more  distinct  metallic  biii> 
reflection  ;  the  oral  border  is  more  often  bordered  with  brown  heretL 
in  the  female;  the  ground  color  of  the  abdomen  i  .  more  opaque. 

I  compared  twenty-flve  males  and  sixty-five  females,  mostly  tal; 
by  Mr.  Morrison  in  the  White  Mountains,  New  Uampshire." — Om. 
Sacken,  1.  c. 

Several  specimens  from  the  White  Mountains  agree  very  well  w: 
the  foregoing  description  of  Baron  Osten  Sacken.  A  single  female  fri 
Arizona  does  not  show  any  appreciable  diftereuce. 

Syrphus  zanthostomus,  u.  sp. 

Habitat. — Pennsylvania! 

S.  Length,  11  to  12'""'.  Face  and  cheeks  wholly  yellow,  anteii: 
reddish  yellow,  the  third  joint  somewhat  brownish  above,  but  lit 
longer  than  wide,  the  arista  black.  Frontal  triangle  with  a  small  bla 
spot  in  the  middle,  gray  pollinose  along  the  eyes,  black  pilose  in  t 
middle.  Dorsum  of  thorax  shining  metallic  green,  with  light  colnr^ 
pile.  Scutellum  wholly  yellow.  Abdomen  black,  but  little  shining.i 
three  principal  bands  very  broad,  attaining  the  lateral  margins  in  tli' 
full  width ;  flrst  band  interrupted,  the  spots  narrowly  sei)arated,  w 
their  inner  ends  rounded;  second  and  third  bands  with  a  narrow ' 
deep  emargination  in  the  middle  behind  ;  fifth  and  sixth  segments  v: 
a  yellow^  hind  margin.  The  black  forms  narrower  bands  than  the  ydln 
and  does  not  quite  reach  the  margin.  Legs  yellow,  the  tii)  of  hind  til 
and  their  tarsi  brownish.     Wings  hyaline,  tlie  stigma  yellowish. 

9.  Front  metallic  green,  yellow  below,  on  the  lower  half  witli} 
lowisU  pollen.  Yellow  spots  of  t':;>  second  abdominal  segment  lai^' 
more  nearly  sfjuare,  and  only  narrowly  sej)arated. 

Two  si)ecimens,  Pennsylvania  (Mr.  Keen). 

Syrphus  genualis,  i;.  sjr. 

JIahiltil. —  New  ilam])shirc! 


$.  Jicngtii,  7..')" 


Front  sb.ining  black,  with  an  interrupte.!  h 


of  whitisli  policii  across  the  middle.  Antcnnte  yellowish  red,  tlic  tli 
joint  brownish  above.  Face  yellow,  a  median  stiipe,  the  oral  iiiai. 
and  the  cheeks,  deep  shining  black.     Dorsum  of  thorax  sliining  iiu' 


ItC^prct 

m^hh 
iailrru] 
routed  i 
hvoA  nii 
femora 
soticost 
Onti  s 

flyiphus 

^ahit 

■%.  L 
bli^k.  1 1 
Ittt^scci: 

Head 
taberclt' 
briellN  1 
estlndii 
Invtt  stet 
pabes(H' 
opaque, 
middle  1 
sabincri 

tibin  loi 

Si|>hus 
J^ahitt 

thorace 

flavidis, 
sdgmoito 
nigris,  j\ 
cli»  hi/al 
Antei 
en  dess( 
mddiantj 
d'un  cot 
av0e  la  1 
h  viUosi 
blancs.  1 
jaupatrc 


,1   ! 


USEUM. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


87 


'HDSL' ;  tin'  siij. 
be  facial  \n)\l[ 
X  bluish  {iiei; 
■acli  side ;  it  > 
0  lour  front  li. 
race  of  a  brow 
isnally  reacli  i; 
stop  a  littliMi 
heir  color  is  re 
di  i)olleii,  will 

t  metallic  blui' 
brown  here  tk 
e  opaque. 
s,  mostly  tat 
ipshire." — O.-i' 

e  very  well  wi 
ngle  female  fn 


yellow,  anteui 

above,  l)ut  lit 

ith  a  small  1)1* 

ick  pilose  iu  t; 

ith  lij,'ht  coliir- 

ittleshining.i 

margins  in  tlit 

sejiarated,  w; 

ith  a  narrow' 

h  segments  w; 

than  the  yello' 

rip  of  hind  til' 

ellowish. 

er  halt  witliy 

segment  lai't't 


iterrui)te.l  h: 
sh  red,  the  tli 
the  oral  iiiai. 
X  sliining  iiu'! 


llti^^reen  black,  nearly  bare.  Scutellum  wholly  light  yellow.  Abdo- 
nllp  shining  black  with  narrow  yellow  bands ;  the  first  rather  narrowly 
in^rrupted  ;  the  second  and  third  straight,  entire,  not  appreciably  nar- 
rOtjied  at  the  margin;  lifth  and  sixth  segments  with  narrow  yellow 
hmi.  margins.  Legs  yellow  ;  the  hind  i>air,  ex(!ept  the  base  and  tip  of 
ftiiora  and  .le  Itase  ol'  the  tibia',  brown  or  blackish.  Wings  hy.'iliue, 
aii|icostal  cei'  ligiit  yellow. 

^i\c  si)ecimen,  near  the  base  of  Mount  Washington,  August. 

Byiphiis  simplex. 

Sjirphiix  simplex  Loow,  Wieu.  Eiit.  Moiiatsulir.,  v,  40;  Cfulur,  vi.  ■V.i. 

Muhitdt. — Cuba  (Lw.),  San  Domingo! 

'■f.  Length  8..')""".  Steel  blue,  lighr  yellow  pilose,  antenna}  and  legs 
Uy^U.  l)ase  of  front  and  middle  tibise  and  the  knees  of  the  hind  legs 
lati*^c«'iit.     r>asal  half  of  the  wings  ])ure  hy;iline,  tij)  blackish  cinereous. 

J|[ead  bjackisli-steel  blue,  shining.  Face  white  poUinose,  the  small 
tHWrcle  l)are.  Eyes  bare.  Antenna-  black,  third  Joint  ovate.  Front 
brfelly  black  |)ilose  on  each  side,  with  a  nnirginal  white  pollinose  stripe 
«l||nding  from  the  middle  of  the  front  to  the  face.  Thorax  and  scutel- 
Ittlif  steel  bine,  shining,  clothed  with  whitish  i)ile.  Abdomen  whitish 
pubescent,  steel  blue,  each  segment  on  the  ])osterior  part  obscure, 
opaque.  Venter  steel  blue,  shining.  TiCgs  black;  base  ol"  front  and 
middle  tibi;c  and  the  knees  of  the  hind  i)air  lutescent,  hind  metatarsi 

fncrassate.    Tegular  whitish.     Halteres  sordid  lutescent.     Wings 
ine,  the  apical  half  blackish  cinereous,  stigma  blackish  fuscous, 
I  longitudinal  vein  nearly  straight. 
'Wiiv  specimen,  San   Domingo  (G.   F.   Frazar). 

fljmhiis  quinquelimbatus. 

'W    Sjirpliiin  qiiinquvUinhuinK  Hifjot,  Ann.  Soc.  Ent.  I'r,,  l';84,  Ul. 

Mol'ifot. — California  (Digot). 

||,  Long.  0  mill.  Antonii.s  iiiffris,  had,  hiferne,  fulvo  notaiis;  fronte 
etMcic pallidc  Jfavin,  paivvfuHCo  tonicntosis,  rittin  media nis  nitjris pictis, 
•'^'TBct'  obscure  nitente,  scutcllo  tcstaeeo,  Jlai'ido  iomentosls;  calyptris  et 
rihus  palidi  tcstaccin;  ahdomine  uiiiro,  I'ittin  irantiVfrsh  quinque 
dis,  prima  intcrruptu,  qitartd  et  qiiiuta  anf/ustis,  ciincUs  ad  apicem 
8i0tte)itorum  locatis ;  pcdibas  paUidv  J'ulviH,  imd  ha.si,  tar.sis  apice  latd, 
niffliH.s,J'cmoribiis  posdci.s  late  fnsco  ainnilati.s,  tihitu  posticiti,  iarsis,  funds; 
aUtJuialiiii.s,  macula  .stinmaticali  louf/d,  obftcurc  Icstaced. 

Aiiteniies  et  chete  noiratres,  W'  segment  assez  <;ouit,  ovalaire  et  teint 
en  dessous,  a  la  base,  d'un  pen  tie  fauve  ;  front  jaunatre  avec  une  bande 
mMiane  noire  elargie  A  ses  deux  extremites,  convert,  ainsi  que  la  face, 
d'un  court  duvet  clairseme  noiratre,  cette  derniere  d'un  Jaunatre  clair 
avec  la  bande  mOdiane  et  les  Jones  brunes  ;  thorax  d'un  noir  pen  luisant 
^  vlllosite  Jiiuiiatre  ainsi  (pie  Tecusson  lequel  est  lestace  ;  cuillerons 
blW^cs.  boi'des  de  Jaunatre,  bahuicit  rs  testaces  ;  alxlonien  n(tir,  \ilIosit6 
jailjpfitre  assez  dense,  sise  de  cJKUpie  (iote  de  la  l)ase,  1"'  segment  avec 


i\ 


88 


HULLKTIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


i'  I!!  il 


I      'l; 


-i!l 


",'1 


I.I 


Li     I 


i  • 


(leiix  inacuU's  inediiines  liinuU;c*s,  allongecs,  auiiiu;io>s  latOralenu'iit 
atteignant  les  cotes,  3^"  et  4^  avec  une  laryo  baiide  basilairc.  atom, 
lateralement  et  atteignant  aussi  les  c6t6s,  ce  tleniier  aiiisi  (|iu'  ], 
bor(16s  (I'm.  janne  obscur,  tons  deux  d'uii  jamie  iiale;  i)ie(ls  fauw 
hauches,  base  extreme  des  cuisses  et  tarses  lai'j;eiiieiit  iioirs,  pie 
post6rieur8  avec  iin  large  auueau  brunatre  difl'iis,  sur  les  eiiissos.; 
tibias  presqiie  en  eiitier  et  les  tarses  d'un  brun  WnwO, ;  ailes  hyalint 
macule  stigmatique  fdlong<5e,  d'liii  gris  jaiuiatre.  Californie. — 1  specim. 
Bigot,  1.  c. 

SyrphiiB  maculifrons. 

S!ir])hu8  mucuUJronii  Bigot,  Aiiu.  Soc.  Eiit.  Fr.,  18(^4,  89. 

Habitat. — Oregon  (Bigot). 

Lonr/.  10  mill.  <?.  Antennis  fulvis,  apice  nir/ris,  mjmento  IP  fere  t 
biciilari ;  frontdfiiNco  toiiicntosa ;  facie  Jlava,  pi iin  minus  nifcscente,  iitr 
que pallidiore.1  ore  nitjro;  tliorave  a'neHcente,  utriiique  obscure  liar ido;  j. 
tello  teslaceo,2)arum  metallcsceute;  calijptrispalli<li:/ulris,  liatleribusjlnt 
abdomine nigra,  utritique maculis  tribns  snlxiitadraiisjlavis',  jiedibiis/nh 
femoribus  posticus  obscure  fiisco  a.  'tdutift,  tibiis  pra'ter  tricntem  hasnh 
t arsis  plus  mimis  iufuscatis;  alis  obscure  hyaliuis.  2.  tSimillima;  /i\ 
nigra  nitida  late  vittatd. 

<?.  Antennes  d'un  fauve  rougeatre,  dessus  et  extreniite  <lu  ii'  h 
juent  noirutre,  ce  dernier  de  lornie  ovaloide  arroiidie,  ehete  rougcai: 
front  brun  i\  ])oils  noirs.  face  d'un  jiuine  plus  on  nioins  rougeatre,  W 
de  I'ouverture  buccale  et  dessous  de  hi  callosite,  noirs;  thorax  d 
bronze  obscur  a  duvet  jaunatre,  lat^ralenient  teint  d'un  jaunatre  obsi 
flancs  noirutres  avec  duvet  jaunatre  ;  ecussou  jaunatre  avec  des  rt^i!' 
bronzes,  souveut  peu  marques ;  cuillerons  testaces,  balanciers  jaim 
abdomen  d'un  noir  mat,  incisions  luisantes,  2*',  3''  et  4^'  segments  iiv 
chacun,  une  grande  macule  lat(^'rale  jjiesque  carree,  ayant  les  ;iii; 
arrondis,  4^  avec  deux  macules  laterales  oblitpies  atteignant  les  cd; 
les  derniers  segments  d'un  noir  luisant  liseres  de  fauve ;  i)ieds  fauv 
cuisses  posti^irieures  avec  un  anneau  obscur  peu  distinct,  tibias  et  vai' 
postdrieurs  d'un  brun  plus  ou  moins  fonce,  sauf  a  la  base  desdits  tili 
ailes  presque  hyalines,  macule  stigmatique  allongee.d'un  testaee  obsi 
5  .  Semblable  au  uu'ile,  front  jaunatre  avec  une  large  bande  media 
d'un  noir  luisant.    Amer.  septentr.  (Mont  Hood). — .19,  2  9 


-Bigot. 


ADDITIONAL  NOKTII  AMERICAN  SPKCIES. 

Syrpkus  agilis  Uijifit,  Aimali's  Soc.  Ent.,  France,  1884,  iW. — Mexico. 

Syrphus  Antiphates  Walker,  List,  etc.,  iii,  589. — Jamaica. 

Syrplius  coUudens  AValker,  TraiiH.  Eut.  Soc.,N.  Ser.  v,  292. — Mexico. 

Syrphus  delineatus  Macinuut,  Dipt.  Exot.,  ler  Supjil.,  i:il):  pl.xi,  tig.  13.— Moi 

Syrphus  eupeltatus  Uigot,  Aiinales  Soc.  Ent.  France,  1884,  91. 

Syrphus  jactator  Lo'^w,  Wicn.  Ent.  Monatschr.,  v,  40;  Centnr.,  vi,  40. — Cuba. 

Syrphus  limbatus,  Wicdiniiiun,  Anss.  Z\v.  Ins.,  ii.  ]:]'.),  ;!().— West  Indies. 

,'<c(iira  liinhalii  I'alii'iciiis.  Syst.  AntL,  '-l.A,  10. 
Syrphus  mutuus  Sav,  ,J.  Acad.  I'Lil.,  vi,  1<!4,  -J  ;  Conipl.  Wi'.,  ii,  358. — Mexico. 


USEUM. 

liitOiiilenu'iit 
isilairc,  nU-m, 
•  aius'i  {[vxv  V 
' ;  pieds  lauv- 
t?ut  uoir.s,  ))i(: 
les  cuissos. 
;  ailes  liyaliiir 
lie. — 1  .speciiii,. 


')ieuto  .'5°  fciio 
rvfcscentv,  uh' 
•jure  J^dvitlo;  S( 
ItaltcrihKsJIm 
,s;  pi'ilihKS  I'uh 

SimiUima;  /c- 

L'lnite  <lii  o"  >f 
uliete  rougcii!: 
rougeatre,  \u 
irs;  thorax  d' 
jaunutre  obsr 
3  avec  des  ivi!' 
ilaiiciors  Jaiiif 
r**  segments  av 
ayaiit  les  an; 
igiiant  les  co; 

e;  i)ie(ls  I'auv 
t,  tibias  et  rai- 
se (lesdits  tibi. 

n  testaee  obse 
e  baiide  niodia 
>  $  .—Bioot. 


iXlCO. 

xi,  fig.  13.— Mes 

vi,  46.— Cuba. 
st  Indies. 

:iuS. — Mexico, 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIID.E.  80 

Ulrrphusnigripes  I..<»t'w,  Ceiitur.,  vi,  14.— Cuba, 
•rphus  praeustus  L<"'w,  Ceiitiir.,  vi,  4."). — Cnlta. 

phus  quadrifaBciatuB  Bigot,  in  R.df  la  Sagra,  etc.,  y04  ;  pi.  20,  fig.  5.— Cuba. 

anus  radiatuB  I>igi>t,  in  R.  do  Iti  Sagra,  etc.,  804. — Cuba. 

ahus  Btegnua  Say,  .J.  Aiad.  Phil.,  vi,  lO:?,  1 ;  Conipl.  Wr.,  ii,  358.— Mexico. 

,  DIDEA. 

Didea  Macquart,  HiHt.  Nat.  Dipt.,  i,  .W8,  1834. 
Fnica  Mei^ren,  Syst.  Hi'sclir.,  vii,  140,  1838. 

liSirge,  iiietallic  black,  not  bare   species,  with   flattened  yellow  or 

gjpeenish-yellow  banded  abdomen.     Head  hemispherical,  broader  than 

tbe  thorax.    Anteniiic  short,  third  Joint  oval,  with  a  basal,  bare  arista. 

iW|K;e  gently  concave  below  the  anteiinre  to  the  obtuse  tubercle,  thence 

fii^eding ;  chiefly  yellow.     Eyes  contiguous  in  the  male,  bare  or  pilose. 

iiorax  without  yellow  on  the  dorsum,  though  it  may  bepollinose  near 

sides.     Scutellum  yellow  translucent.     Abdomen  broadly  oval  and 

ttened,  broader  and  much  longer  than  the  thorax.     All  the  legsslen- 

Wings  ('omi)aratively  sliort  and  broad ;  third  vein  with  a  consid- 

Ible  sinuosity  bending  info  the  flrst  posterior  cell;  otherwise  as  in 

l^|rphus.     Type  of  genus,  D.faseiaia  Macquart,  Europe. 

/iThis  genus  cainiot  be  distinctly  sepnrated  from  Syrphus;  as  its  chief 

o3|iract.eristic,  the  (curvature  of  the  third  vein,  is  also  found  in  one  of 

^^  varieties  of  Syrplim  arcioifits.     It  is,  however,  useful,  and  may  be 

riUkiincd. 

TABLE  OF  SPECIES. 

-  '4' 
Lif-Third  joint  of  antcniue  ()l)tu.s(.'ly  pointed  at  tip;  eyes  bare;  abdominal  cross- 

bandu  broader  toward,  but  not  quire  reacliiufr,  the  lateral  margin  of  tbe 

abdomen fuscipes 

i  Third  joint  of  antenuic  olitusely  rounded  at  the  tip 2 

f-Eye8  bare  ;  cross-bantlH  broadly  interrupted.     (See  Syrphus  arcuatiis  var.  lapponi- 

CUH. ) 

|EyeN  I  hinly  jtilose  ;  the  abdominal  cross-bandH  reacli  narrowly  quite  to  the  lateral 
niargiu laxa 

XMdea  fasciata  fuscipes. 

lUdcafiisdpes  Loew,  Centnr.,  iv,  82;  Osten  Sackeu,  Cat.  Dipt.,  245,  note  212. 

Sahitat. — Connecticut,  Pennsylvania! 

5  ,  $  .  Length,  11""".  Eyes  bare.  Antenna^,  black,  the  third  joint  at 
•tiMS  base  sometimes  reddish,  elongate  oval,  obtusely  pointed  at  the  tip; 
arista  reddish.  Face  yellow,  with  a  small,  elongate,  brownish  spot  on 
tlUB  tubercle.  Front  yellow,  with  two  brownish  spots  above  the  anten- 
nfOi  or,  in  the  female,  with  an  inverted  V-shaped  brown  stripe  connected 
'witti  the  black  of  the  upper  i)art  of  the  front.  Orbits  thickly  yellow- 
ish: poll  inose,  and  with  a  fringe  of  yellowishwliitisli  ]»il('.  Thorax  shin- 
ing greenish  black,  on  the  nl('^■o,  i)te)'o,  and  stcnioidcuiic  yellov,  thickly 
covered  with  similar  colored  jtollcn  and  jjilc.  8(nitellum  light  yellow, 
translucent.     Abdonji'ii  l)hick,  with   four  yellow  cro.ss-bands,  the  first 


i'>    ' 


,t. 


Il1 


'   I, 


l>  . 


II    '  I 


'    ,    I  ' 


li!: 


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M  I 


IMK 


) » 


|i: 


\ 


90 


BULLETIN    31,    UNITED    SVATES    NATIONAL    MUSEUM. 


consisting  ot'  two  large  ovate  spots,  narrowly  sei)aratcd  and  reacbin; 
the  lateral  margins ;  second  and  third  cross-bands  broad,  separated  tVo: 
the  lateral  margins  by  a  black  narrow  border;  tlie>  are  mncli  narrower 
the  middle  of  the  segments,  the  lrt)nt  maigin  straight,  touehiug  tlio.u 
terior  edge  of  the  segments;  fourth  band  similar,  but  miu;h  siuallc 
posterior  maigin  of  the  segments  shining,  dilated  in  the  mithlle.  Lc. 
brown,  the  posterior  libiu' and  all  the  tarsi  blaeki.sh;  souietinies  tl, 
legs  are  luteous,  the  base  of  ieuKua,  distal  portion  of  tibiie,  and  the  tiir^ 
brown.  Wings  grayish  hyaline,  the  base  before  the  humeral  cross  vi 
and  the  st.gma  brown,  the  r«'mainder  ol"  the  subcostal  cell  and  tl 
costal  cell  may  be  biownish  :  tliird  vein  rather  deejdy  curved  near  tl 
middle  of  the  first  ]»osteiior  cell. 

Three  specimens,  Connecticut,  Pennsylvania  (S.  Auxer,  E.  Keen). 

This  species,  as  it  has  been  called,  shows  but  slight  differences  fro: 
D.fasciafa  of  Eurojie.  The  i)ropriety  of  se]>arating  them  sjiecitieal; 
is,  to  say  the  least,  very  doubtful.  The  only  real  diiieience  appears; 
be  that  the  legs  are  a  Uttle  lighter  <!olored.  In  a  single  specimen  tb 
I  have  from  lloUand  the  bands  are  narrower  on  the  abdomen  and  tl 
brownish  color  of  the  wings  fainter ;  the  legs  are  black,  with  the  ba> 
of  the  tibisB  reddish. 

Didea  laxa.     (Plate  IV,  figs.  4,  4a.) 

Didea  laxa  Osteii  Sackon,  Bull.  Buff.  Soc.  Nat.  Sci.,  111,50;  Cat.  Dipt.,  21; 
note  212. 

Habitat. — New  Hampshire,  California,  Washington  Territory,  0: 
egf  n  !,  Michigan,  Maine  (O.  iS.). 

5,9.  Length,  10  to  1.3""".  Eyes  pilose,  more  distinctly  so  in  tl 
male.  Antennae  black,  third  joint  oval,  obtusely  rounded  on  the  eiic 
arista  black.  Face  yellow,  with  a  broad  shining  black  or  brown  stiiit 
not  rea(!hing  the  antennae.  Cheeks  brown.  Frontal  triangle  bliiti 
yellowish  dusted  along  the  eyes,  pile  black;  front  in  female  sliiiiiii. 
black  ;  on  the  sides  the  yellowish-gray  dust  extends  up  along  the  eye 
and  expands  in  the  middle,  nearly  meeting.  Thorax  blackish  metall 
green,  shining.  Scutellum  dull  brownish  yellow,  with  a  slight  greeiik 
or  bluish  metallic  luster.  Pleurae  with  a  whitish  vertical  stripe.  Al 
domen  black  or  bluish  black,  with  greenish  yellow  cross-bands;  oritl 
second  segment  two  large  oval  spots,  reiiching  (rarely  narrowly  scp. 
rated  a'om)  the  lateral  margins ;  third  and  fourth  segments  each  wi;. 
a  cross  band,  extending  narrowly  quite  to  the  lateral  margins,  bicoiivK 
behind,  and  with  a  sharp  jiosterior  notch  in  the  middle,  in  some  s\w: 
mens  distinctly  interrupted  ;  fourth  segment  behind  narrowly  yellow: 
the  middle,  forming  with  the  anterior  angles  of  the  fifth  an  entire  cros 
band;  fifth  segment  behind  yellow;  ])ile  on  the  black  portions  blact 
elsewhere  yellowish.  Venter  black,  the  second,  third,  and  fourth  w. 
uients  each  with  a  broad  cross-band,  narrowed  in  the  middle.  Leg.s  yi 
lowishred;  iiroximalhalf  of  front  ai  1  middle  femora  black,  hind  feiiio: 
black,  except  at  tiji;  hind  tibite  with  a  brown  ring  in  the  middle,  .mim 


irt' 


i» 


USEUM. 

tl  and  reacbini 
,  separated  IVo^ 
ucli  iiiuTower; 
oucliiiigtluM; 

iiiucli  .sniilllf; 
e  middle.    L- 

sometimes  tl 
Hi,  and  the  tiir. 
iieral  ciuss  vt; 
al  cell  and  tl 
iirved  near  tl 

i'V,  E.  Keen), 
lillerence.s  frut 
lem  s])ecificali 
[ince  appears! 
'  .specimen  tb 
domeu  and  tl 
,  with  the  ba> 


i;  Cat.  Dipt.,M 

Territory,  0: 

uctly  so  ill  tl 
ed  on  the  eiic 
)r  brown  stiiiif 
triangle  bliiii 
female  sliiiiiii. 

along  the  eye 
ackish  metall 
slight  greeiii>. 
ill  stripe.  Al 
-bands;  oiitL 
narrowly  scp. 
lents  each  wi:. 
rgins,  bicoiivK 

ill  some  spii 
mwly  yellow:. 
an  entire  cros; 
l)()rtioiis  blaii 
ind  fourtii  st. 
die.  Le^s  yi 
Ltkjliiiid  I'ciiin: 
e  middle,  son- 


SYNorsis  01'  Noirnr  amkricax  SYHPiiiDiE. 


tl 


les  extending  over  the  whole  tibia- ;  trout  and  middle  tarsi  brownish, 
«icept  the  biise  and  lip;  liitid  tarsi  on  the  three  intermediate  Joints 
lllackish;  tiie  metatarsi  also  sometimes  blackish.  Wings  with  a  grayish 
tinge ;  stigma  brownish  ;  veins  on  basal  part  red  ;  curvature  oi  the  third 
V6in  more  shallow  than  in  D.fuscipcs. 

'  Tiiree  specimens  from  the  AVhite  ]Monntains  (Dr.  George  Dimmock, 
1800)  and  thirty-three  from  Oregon  and  Washington  Territory;  also, 
Hffee  from  Calilbrnia.     In  some  of  the  Western  siiecimeus  the  front  and. 
middle  tibiai  have  a  small  brownish  ring. 
This  species  corresponds  to  i>.  i«/«e/i' of  Europe. 

XANTIIOGRAMMA. 

Xnnthogrnmma  Scliiiior,  AVicn.  Kiit.  Moiiiitsclir.,  iv,  215,  1860. 

[oderately  large,  nearly  bare,  sj)ecies,  black,  with  yellow  markings 
oi  head,  thorax,  and  abdomen.    Anteniuii  shorter  than  the  head,  third 

||nt  ova),  arista  basal,  bare.  Face  yellow,  tuberculate.  Eyes  bare. 
Contiguous  in  the  male;  front  long  in  the  female,  narrowed  above. 
I^jorax  with  yellow  lateral  stripes.  Scutellum  yellow,  its  base  black. 
Abdomen  more  than  twice  as  long  as,  and  wider  than,  the  thorax  ;  ellip- 
tical or  with  the  sides  nearly  ]»arallel,  not  club-shaped.  Legs  simple, 
gfender.  Wings  as  in  >^yrphiift,  the  third  vein  often  gently  curved  into 
tl|e  lirst  jiosterior  cell.     Type  of  genus  A',  onidtu  i\I(!igen,  Europe. 

This  geu"s  cannot  be  sharply  distinguished  from  ^i/rjyhus,  as,  except 
Ui  acqualis  and  Jlavipcs,  the  later.il  dorsal  stripes  are  not  much  more 
CifDspicuous  than  in  certain  species  of  Syrphus. 

TABLE  OF  SPECIES. 

3^>r-D()rsuiu  of  thorax  bctorc  tli«  seiit(;Ilimi  with  two  coiilcsr.eiit  light  yellow  spois ; 

i  wings  with  a  lirowii  aiitt'iior  margin aequalis 

,1  Dorsum  of  tiiorax  without  vcllow  spots  on  thr  hind  margin  ;  wings  not  brown  in 

■  front a 

J||t-r!cura;  with  light  v('lh)w  spots flavipes 

rirurac  without  distinct  liglit  yellow  siiots :{ 

3,»(— The  yellow  banil  on  the  second  abdominal  segment  attains  the  lateral  margin. 

emarginata 
_  V    The  yellow  band  of  the  second  segment  is  sei)arated  by  a  distinct  black  interval 

"  from  the  lateral  inargin 4 

#i"— All  the  cross-bands  of  abdomen  broadly  interrnjited divisa 

All  the  cross-bands  not  broadly  inti'rrupted falix 

SBjUithogramma  felix. 

'.,       X<iiilhoijr(iniw<i  jVIix  O^ivn  Sacken,  Hull.  Ibilf.  Soe.  Nat.  Sci.,  iii, (i?  ;  Cat.  Dipt., 
^:  l:2f)and^l7,  note^iir.:  Wiiliston,  Proe.  I'hil.  Soc,  xx,  lill. 

M'lhitiit. — Illinois,  New  York  (().  8.),  (Connecticut! 

, "  5  .     Length  D.n  to  10. .")""".     Face  and  <!lieeks  yellow  (in  all  my  speci- 

B|©ns,  except  one,  the  face  has  the  brownish-red  tinge,  which  the  faces 


>i 


m 


!  If 


1 


I     'I 


^'      II 


2!^ 


'i 


|;i:l:  1^ 


•^ 


J;|\  1. 


Ivi 


M    ,    ,■   h 


i       't 


¥  t 


i 


:^ 


! 


92 


HULLETIN    :U,    UNITED    STATES    NATIONAL    .MUSEUM. 


of  Syrplius  Hometiines  assume);  vertex  dark  nietallic  {,'roeu,  emiltiii; 
stripe  of  tbe  same  color,  whidi  readies  the  base  of  the  ajitenim',  wIh 
it  expands  a  little;  between  this  stripe  and  the  eyes  the  front  is  ydli, 
Antenna'  black,  sometimes  faintly  reddish  on  the  under  side,  neai  i 
suture  of  the  second  and  third  Joints;  third  Joint  rather  larae,  ov 
blunt.  Thoracic  dorsum  of  a.  rather  bright  metalli<!  {jreen ;  on  eacli  si, 
a  yellow  stripe  runs  j'rom  the  humerus  to  the  callosity  near  the  scute 
the  latter  yellow,  the  extreme  base  and  corners  blackish,  or  brow; 
Pleurae  with  a  larjye,  ill-deliiied  yellow  spot  below  the  win{,'s.  First  a 
dominal  sefjuu'ut  with  a  yellow  spot  each  side  (Just  under  the  haltcii" 
the  first  cross-band,  (on  the  second  se<?mcnt),  is  eitliei'  interrui)te(l  In 
very  narrow  black  line  in  the  ini<ldle,  or  j-ntirc  ;  the  second  band  isi 
arctate  in  the  middle,  its  hind  margin  beiny  a  shallow  obtuse  anjjlc;  i 
same  may  be  said  of  the  third  band,  excejit  that  the  obtuse  aiijLjIc 
deeper,  and  often  has  a  notch  in  the  middle,  which  sometimes  cuts  t; 
band  in  two;  there  is  a  narrow  fourth  band  at  the  base  of  the  fifth  ■.(, 
ment,  f>ncroachiiij;  ui)on  the  hiiul  margin  of  the  jjiecediufj  segment ;  i 
fifth  segment  has  a  imrrow  yellow  posterior  nmrgin.  Legs  yellow,  lii;i 
legs  black  or  brown,  exce])t  th<'  base  of  the  femorii,  and  a  s])ace  on  ln- 
sides  of  th<'  knees.  Wings  with  a  distinct  brownish  tinge  on  thcdiv 
half,  anteriorly;  stigma  brownish;  sometimes  the  whole  wing  hh 
brownish  yellow  tinge. 

"Habitat,  West  Point,  X.  Y.,  in  September  S-](),  three  females;  i: 
nois;  Pennsylvania.  (The  speciiiuMi  from  the  latter  locality  is  siim!!, 
wings  more  hyalitie,  legs  and  antennie  of  a  ])aler  color).  The  first  ;; 
third  bands  are  as  often  interru])ted  as  nut;  the  secoiul  often  sli(i\v> 
vestige  of  an  interru])tion  in  the  slia])e  of  an  iiidistin<!t  l>lackish  line 
tbe  middle.'' — Osten  Sacken,  1.  c. 

A  single  female  s])ecimen  from  (.'onnecticut  (Dr.  L.  T.  Day)  ii^in 
very  well  with  the  Ibregomg  descrijjtion,  except  that  the  third  Joint 
the  anteinia;  is  black  above  and  at  the  tip,  and  the  other  Joints  arc  it 
dish.  The  first  ami  third  cross  bands  of  the  abdonuMi  are  narrowly  i 
terrnpted,  the  second  entire,  but  emarginate  behind. 

Xanthogramma  divisa. 

A'anthoyramma  dirisa  WilliMtoii,  Proc.  Am.  Pliil.  Soc,  xx,  311. 

JIahitat. — Washington  Territory,  White  Mountains! 

9  .  Length  9  to  1P"°'.  Face  and  cheeks  yellow,  or  red<lish-yollo' 
Face  nearly  perpendicular,  gently  concave  below  the  antemne,  and  wi 
a  large  obtuse  tubercle  below.  Front  above  metallic  greenish -blai: 
continued  as  a  broad  strii)e  to  the  base  of  the  antenna',  soniewhiitt: 
panded  below;  on  the  sides  yellow.  Antenna'  black;  sotnewhiU  iv 
dish  below  on  the  sides  of  the  se(!ond,  and  of  the  third  Joint  near' 
base.  Dorsum  ol'  thorax  dee[)  metallic;  green,  with  rather  ill-dc'iii' 
yellow  lateral  stripes.  PleuraMvith  a  large  ill-defiiu'd  sjx.t.  Sculi'llii. 
a  somewhat  translucent  yellow,  its  base  luirrowly  l)lack.      Abdoim; 


lUSElIM. 

,'n'('n,  oniittiii; 
1  iuitcniiii',  wlif. 
L*  front  is  y\']\ir. 
er  side,  near  ti 
Mier  larce,  ov; 
■en ;  on  eacli  si, 
near  the  sciitt 
'Uisli,  or  l»ro\n 
tinjfs.  First  a 
ler  the  hiiltcri- 
interrni)tetl  Ir 
cond  band  is, 
btuse  angle;  i 
',  obtnse  an ;,'!(• 
letinies  cuts  li 
'Of  the  fiftlis,, 
u<i  sejjinent;  t 
L'gs  yellow,  lii:i 
1  a  si)ace  on  lie 
ufjeon  tli('(li> 
lole  wing  li;h 

ee  females;  i; 
I'ality  is  stiiiill. 
.  The  first  ;; 
d  olten  sli(i\v> 
blackish  liin' 

T.  Day)  ii-iv 
le  third  Joint 
n- joints  arc  iv 
are  narrowly  r 


m 


SYNOPSIS    OF    NOKTir    AMEHICAN    SYUrillD/i: 


5)3 


reddish-yello' 
itennse,  and  w: 

greenish -bliU: 
e,  soniewhiit  •; 

somewhat  n 
•(1  Joint  near ;. 
itlier  ill-d('iii? 
l)(,t.  Sentcllri. 
ek.      Alxloiin: 


J  jUrst  segment  with  a  small  yellow  spot  on  eaeh  si<h'.Jiist  un<ler  the  hal- 

^ijires :  second  segment  with  an  oval  spot  on  eaeh  side,  not  reaching  the 
JUlte'al  margin,  somewhat  atteimalcd  t<nvard  the  inner  end;  third  and 
,|j»urtli  \^itll  large  reetangnlar  spots  separated  by  nearly  their  own 
width.  Mid  not  (piite  reaching  the  lateral  margin;  liltli  with  an  anterior 
lilHcia.  naiKiWfr  in  tiie  middle,  and  encroaching  slightly  npon  the  j)re- 
4}||diiig  segment.  I.cgs  yellow,  ;interior  and  middle  femora  sometimes 
narrowly  Itrown  aninilate  near  the  base;  posteiior  legs  mostly  brownish 
or  blackish,  except  the  l»ase  (»f  fenu)ra,  and  bi'oadly  on  the  knees. 
Wings  hyaliiK'  with  a  slight  smoky  tinge;  stigma  yellowish. 

Plight  sp«'cimcns,  Washington  Territory,  and  a  single  female  from  the 
White  .Mountains,  New  Hampshire.  .Inly  I'.'t. 

iThis  species  is  very  elo-sely  related  to  A, /cZ/.r,  and  1  am  not  at  all 
l^re  l«iit  that  it  may  be  the  same.  The  broadly  interrupted  bands  of 
,|^e  atxlonu-n.  however,  seem  to  indicate  a  speeilie  dilference.     The  ab 

.4puieii  in  all  my  specimens  is  broadest  at  the  tip  of  the  third  segment; 

,li| my  single  specimen  of  X.fclix  it  attains  its  full  width  at  the  end  of 

.Jlie  second. 

SCRntho  gramma  emaiginata. 

Scira  ciitdrijiiiata  Say.  .1.  Acad.  Phil.,  iii,  '.)1,  .j;  Coinpl.  Wr.,  ii,  79. 
Si/riiliiis  iinarfiinatiin  \\'ii'(l('iiiaiiii,  Auss.  Zw.  Ins..  ii,  Hit, 4. 
•        !  .llliiiirdjild  rmavfiiiitilii    O.sti'ii   S;i(Ucii,    Cat.DijJt..  Iviti.     (The   (iiiery   i.s  Osteri 

Saikcii's.) 

lltilnfdt, — I'lorida.  I'ennsylvaina,  >.'«'w  llam]»shirel 
*  ^  .  9  .  Length,  10  t(»  11""".  Face  wholly  yellow  (or  rcddi.sh-yellow). 
ABtciiiiic  reddish  ;  the  third  Joint  near  the  ba.se  and  on  npi)er  ])art 
biackisli.  Frontal  triangle,  Jnst  above  tin*  antenna',  with  two  blackish 
spots,  connected  by  a  brownish  arcuated  band  ;  elsewhere  the  triangle 
igyelldwish  pollino.se.  Front  in  female  shining  metallic  green:  on  the 
St^es.  iVom  a  little  below  the  ocelli,  yellow  like  the  face,  and  yellow  ])ol- 
liljtosf':  ]»ile  black.  Thorax  shitung  bronze-green,  with  a  rather  broad, 
not  conspicnous  yellow  stripe  on  each  side;  an  ill  detined  yellow  spot  on 
the  i)icnra'.  Scntellnm  translucent  yellow,  with  black  and  yellow  pile. 
Abdomen  opaque  black:  first  segment  shining,  yellow  on  the  sides, 
near  the  halteres ;  second  segment  with  the  extreme  fi'ont  angles  yel- 
low, and  two  large,  oval  sjmts,  imrrowly  .se])arated,  and  only  a  little 
attenmited  before  the  lateral  margins,  which  they  touch;  third  segmeni". 
narrowly  yellow  at  the  anterior  angles,  and  near  the  middle  with  a 
broad  yellow  crossban<l,  not  attenuated  at  the  sides,  separated  from 
tbe  lateral  margins,  or  the  anterior  anglesonly,  nearly  touching,  behind 
iri'the  middle  with  a  bioad,  angular  eniaigination,  reaching  about  half 
way  through  the  band;  posterior  edge  of  the  third  sej^ment  also  nar- 
rowly yellow,  but  not  reaching  the  sides,  fornung  with  the  yellow  mar- 
gin of  tin;  next  segment  a  narrow,  gently  arcuate  band  ;  fourth  seg- 
ment with  a  similar  median  cro.ssd)anil,  but  the  posterior  emargination 
deeper,  and  more  aonte,  nearly  cutting  the  band  in  two  (in  some  speci- 


1"  r 


11    '''. 


p.  i; 


t 


I 


f|i    M 


V     '  I 


'I:      I 


I     '  ■ 


I S :. 


f  I 


94 


mir-LKTiN  :ti,   i'mted  states  nationaf.  muskum. 


I 


mens  distinctly  inti'rrnptcd),  the  postt'iior  inurt;iii  of  tlu'  soKnieii- 
luoro  broiidly  yrllow;  fifth  scjjiiuMit  with  a  triiuifxiilav  hiisal  spot  oik,, 
side,  and  the  jjosterioi-  inar^'in  yellow.     Le;;s  yellow  :  the  hind  fen, 
and  tibial  with  a  ratln'i-  broad  liny-,  and  the  hind  tarsi   brown.     W 
hyaline  ;  sti;,nna  liylit  yellowish. 

A  sin},'le  speciiinen,  IVoni  Trofessor  liiley's  eolleetion,  labelled-: 
found  under  bark  of  <'otton  tree,  l"'la.  Apr.  20,  '74.''  Another  spiMJn 
was  reeeivi'd  from  Mr.  I'^uf^ene  Keen,  of  IMiiladflphia,  eollectiii 
Pennsylvania  ;  also  three  males  and  one  female,  collected  by  my. 
near  the  bas(^  of  iMt.  \Vasliii>'4;ton,  near  evening,  .Inly  25. 

Tn  a  siiecimon  from  the  White  Mountains,  examined  since  the  al 
was  written,  I  tind  the  si)ots  of  the  second  segnu'nt  distinctly  sepnir 
from  th(»  liiteral  marj^in.  It  niijiht  readily  be  confounded  with  >| 
mens  of  X.fcJix^  but  the  species  otfeis  other  distinct  ditlerencses.  ji 
ema){fin(it((  the  last  se(;tion  of  the  fourth  vein  is  longer  and  more  oIiIhi 
the  first  posterior  cell  broade^  ;  tiie  first  i)air  of  abdominal  sitots 
more  broadly  separated,  and  the  tw(>  following  bands  more  ronmldl 
their  posteiior  angles;  the  black  of  the  abdomen  is  less  shiniii;:, 
dorsum  of  the  thorax  more  metallic  than  in  the  two  specimens  m 
feliv  known  to  me. 

Xaiitbogramma  flavipes. 

DoroxJIaripvH  Louw,  Ceut\ir.,iv,  8^. 

Habitat. — Pennsylvania,  Connecticut!,  New  York  (O.  S.) 
<J  ,  9  .  Length,  7  to  10""".     Head  jjiire  light  sulphur-yellow;  in 
female  the  front  much  nairowed  above,  with   a  blender  black  st; 
reaching  from  the  black  vertex  to  the  base  of  the  antenna\     First } 
of  antenujii  yellow;  .sect)nd  Joint  yellowish  reddish;  third  joint  lili 
ish,  reddish  toward  the  base  below,  rounded,  laiger  in  the  fenialr, 
the  male  an  inverted  V-shajJcd  ridge  above  the  antenme,  Vvith  a  .^ii 
black  dot  in  the  apex.     Face  coiisideiably  receding,  with  a  proiiiii; 
tubercle  below  theniiddle ;  i»ile  yellow,  on  rlie  ])osteiior  orbits  wL 
Thorax  shining  greenish  black,  the  lateral  stripes  entire,  bright  ycl! 
sharply  distinguished;  on  the  pleurai,  a  middle  stripe,  reaching  m\ 
sterno-j>leura,  a  spot  above  the  anterior  eoxa^,  and  the  sides  of  the  iiit 
notum, yellow.    IScutellumliglityellowalong  its  uuirgin.blackat  tliobi 
Abdomen  velvety  black.     In  the  male  the  lii"st  segment  shining;  secc 
segment  with  a  broadly  interrupted  yellow  fascia  near  the  front  pa 
third  segment  with  the  broadest  fascia  entire,  on  the  front  pait,  cm 
ginate  behind;  fourth  segment  similar,  and  also  on  the  hind  boii 
narrowly  yellow,  not  reaching  the  sides,  but  forming  with  the  aiitn 
angles  of  the  fifth  segment  a  stronglj'  arcuated  band,  the  latter  > 
ment  yellow  behind;  hypopygiuni  blackish;  third  segment  across'    wltht\ 
middle  with  a  narrow  shining  fascia,  which  in  some  specimens  iiuiy    nlate. 
reddish;  fourth  segment  with  a  broader  shining  cros*sband;  fifth  wIk    with  t 
so.     In  the  female  the  first  three  cross- bands  are  narrower  than  in     niMdle 
male,  of  an  even  width,  not  interrupted  nor  emarginate,  the  sliiir    of  Ihe 


i    ! 


MTSKUM. 


HVNOI'SIS    OK   NORTH    AMKRICAN    HYRPHIP/K. 


!'5 


f  tlu'  soKiiieii: 
biisiil  spot  on  (., 
;  the  hind  rcn, 
i   blown.     W 

on,  liibelU'd": 
Xnotlior  M|)(;(i.| 
|)Iiia,  collcctd; 
llcctcd  l>y  iiiu 

I  .since  till'  al» 
stinirfly  scpiiin 
nndcd  witli  >| 
itteionci's.  h 
Hid  more  olilnj 
loniinal  spots 
jnoie  ronnddl 
loss  sliiniii;:, 
)  specinitMis  oi 


D.  S.) 

nr-yellow ;  in 
idcr  bliiclv  st; 
■nna;.  First; 
third  joint  lil,i 
n  the  I'onialt'. 
mil',  v.itli  a  •!! 
with  a  pioiiiii; 
I'ior  orbits  wL 
iro,  brifjht  yAV 
',  roacliing'  oir 
sides  of  the  iiit 
.black at  tliflu 
t  shining;  socc 
r  the  front  pa: 
front  part,  m 
the  hind  boii 
with  the  aiitK 
ul,  the  latter  > 
gfnient  aoross' 
ipeciinens  nniy 
)aud ;  fifth  win 
rower  than  in 
nate.  the  sliii; 


||g|(;iii'  across  the  second,  third,  and  fourth  si'gnients  arc  bioader  and 
iOnn'times  (pnte  reddish  or  yellowish  in  the  middle;  pile  yellow  on  tho 
jftllow  jiortions,  black  elsewhere.  Le},'s  yellow;  the  hind  tarsi  reddish 
or  blacliish,  except  the  last  two  joints.  Wings  hyaline;  the  stigma 
yellowish. 

Six  specimens  from  Connecticut.     This  species   is   foniul   nsnally  in 
thick,  shady  vegetation,  in  damp  p!a(!es. 

Ztnthogramnia  gequalis.     (I'lati^  I\',  tii;.  <1.) 
IhiriiH  (i<liiiilin  I. new,  Cent  ill'.,  iv,  "T 

ffahltot. —  rennsylvaiiia  (Lw,),  District  of  ('olnmbia  ! 
9.  liCiigth.  S""".  I'^acc  briglit  yellow,  a  brown  spot  on  the  cheeks, 
aiad  11  siiiiill  laint  one  on  tlw  tubercle.  Antennie  black,  the  basal  joiut.s 
and  ba>e  of  the  third  Joint  reddish.  I'roiit  rat Iicr  narrow  above  ;  yel- 
low, black  lit  the  vertex,  <'oiitinned  us  a  rather  nairow  bla(;k  stri|)0  to 
tilebiisc  of  t  lie  antenna'.  Thorux  black,  nearly  bare  ;  near  the  iniddle  of 
the  dorsum  with  two  iiiint  pollinos.' strijies;  on  the  lateral  margin  with 
auarrtuv,  well-defined,  bright-yellow  strijie  ;  on  the  posterior  margin, 
with  a  rather  small  transverse  yellow  spot,  cut  in  two,  or  nearly  so,  by 
a  rectangular  black  einargination  in  front.  Plennc  with  two  oval, 
bright  yellow  spots,  one  on  the  sterno-pleura'  and  one  above  the  fnmt 
coxa"-.  HtMitellum  reddish,  blackish  at  the  base,  along  its  border  with 
a  row  of  short,  light-colored  hairs.  Abdomen  cylindrical  in  front,  com- 
pressed behind,  shining  black,  with  rathernarrow  bright-yellow  bands, 
aa  follows:  An  arcuate  band  near  the  middle  of  the  second  segment; 
aitraiglit  one  at  the  base  of  the  third  segment ;  one  at  the  base  and 
one  at  the  jiosterior  margin  of  the  fourth  segment,  the  i>osteri(U'  one 
dilated  in  the  middle  ;  on  the  posterior  margin  of  the  third  segment 
there  is  a  small  median  yellow  s])ot,  and  on  the  til'th  segment  tliert^  is  a 
Blonder  longitudinal  stripe,  not  quite  rcuchiiig  the  anterior  niargin. 
Vonter  with  four  yellow  cioss  bands,  the  first  three  rather  broad,  and 
ittmated  ui)oi;  the  ])osterior  niaigin  of  tlie  i>receding  and  anterior  mar- 
g£tl  of  the  following  segments ;  tlu'  foiuth  band  is  linear,  and  situ- 
ated upon  the  hind  margin  of  the  fourth  segment.  Legs  yellow ;  the 
femora  broadly,  in  the  middle  (es])ecially  the  hind  pair),  the  tip  of  tho 
hind  tibiie,  and  the  hind  tarsi,  reddish  or  brownish.  Wings  nearly 
hyaline,  along  the  front  border  rather  narrowly  and  e(puilly  brown. 

'^sf  .  Length,  9.5'"'".  Head  yellow,  vertical  triangle  and  occiput  black, 
t]|0  latter  white  pollinose  on  the  margin.  Frontal  Innnle,  antenna), 
and  cheeks  blackish  pitchy.  Thorax  black,  clothed  with  Intescent 
and  whitish  blackish  pile ;  dorsum  on  each  side  with  a  yellow  stripe, 
and  on  the  [posterior]  margin  with  two  confluent  sjiots:  besides  these, 
with  two,  more  obsolete,  whitish  pollinose  stripes.  Pleura)  yellow  bimac- 
nlate.  Scutellum  testaceous.  Abdomen  of  equal  width,  black,  shining, 
with  three  narrow  yellow  fascia;;  the  first  moderately  anniate,  in  the 
middle  of  the  second  segment;  se(!ond  and  third  straight,  at  the  base 
of  the  segments,  both  narrowly  interrupted;  basal  fascia  of  fifth  seg- 


Of; 


i»ui-li;tin  :ti,  rxm:!)  status  national  muskum. 


■r  ;  r  •» 


■     <i 


\  I 


iiK'iil  foiK'ciilcd ;  poHtcrior  iiinijiiiis  of  third  :iti<l  foiiitli  .st'fjiiUMits  •, 
low,  tillli  scyiin'iit  with  ii  ,v»'Ihtw  Iriiiii^-h'.  N'riitiT  bhick,  with  [1, 
iiaiTow  insriii",  and  the  hind  margin  dl"  the  tit'tii  st';,'im'nt  .vcMow. 
tciior  fciiioui  tiis<"oiis,  (»ti  thtir  po.'^tci  inr  si'i'-s  riiscoiis  ItliicU,  on 
apical  tiiird  ,V('ih)\v;  iiiiid  I'einDia  iiisr  us  l)la('k,  husr  liitcoiis,  lip v 
h>w;  tihia!  yrHow,  <li.stal  half  of  tiir  hind  oncM  liiNcons  nchiiuih 
anterior  tarsi  Intt'ons,  hin<l  ones  ochraccons  i'nscuuH.  \Vin;;.s  u 
<lilntfl\  snlwnfnscatc,  costa  Itroadl.v  and  of  (M|nal  width,  ('h)udiMi  w 
l'ns(!ons. — Translation  fi'«Mn  liOcw.,  1.  c. 

A  sin^'U'  rcnialc   from  N'irj-inia,  lorwhiidi  I  am  iink'l)t«'d  to  the  kr 
iit'ss  of  Mr.  Th«'o.  IV'r;4and<',  l»(don;;s,  I  believe,  to  this  s|)ecies,  notw: 
standing;  the  di!!'eren(;es  from  Loj'w's  descrription  in  tliu  n)arkin;>'s  cif 
aWdonM'n  and  le;;s.     It  is  a  very  .striking?  species,  an<l  may  perhaps  li. 
true  Doros. 

An  exannnation  of  the  typo  specimen  asisurtvs  nio  that  tho  iuuIcn: 
female  here  described  belon;,'  toj^ether. 


ALLOGIIAPTA. 


llMlfet  s 
flhWe  j 
ring,  a  I 

AUograpia  Otiunx  Sackcii,  Hull,  linll'.  Soc.  Nat.  Sci.  iii,  .|<»,  1^7(5.  T6lllH  li 

ICIon^iiite,  snmll,  bare  species,  thorax  with  yellow  lateral  stripes,;      *  ^^' 


abdomen  with  yellow  ban<ls,  and  on  the  fonrth  and  fifth  segments  w 


Nt 


,,    II 

two  slender  median  stripes  and  (ddique  side  spot.     Kyesin  thenndow  "wWy- 
an  ai'eaof  distinctly  enlar;;'ed  facets  on  npjx'r  part.    <  celli  as  in  Sijqi  iMtegraj 
Thorax  without  median  cinereous  dorsal  strii)e.     In  this  latter  aih;  J/ 

other  respects  as  in  Syrphiin.    Type  of  yenns,  A.  obliqua  Say.  Aahi 

TABLE  01'  SPECIES.  slightl.N 

Face  wholly  yolliiw,  or  in  tho  iiiiddlf  only  f.i.'itly  brownlsli obliq:       ™     ' 

"I'iui'  with  a  bluish  black  stripe,  oxtondiiif?  froui  tho  orni  niarj^in  to  tho  untiii!;  '""Ifl  J^i 

frac:  brigbt 
AUograpta  obliqua.  huBiern 

Scaeva  obliqita  Say,  J.  Acad.  Phil,  iii,  89,  2;  Conipl.  Wr.  ii,  78.  feUovvi." 

Sjirphtts  ohliqitiis  Siiy,  Ainer.  Eiit.,  pi.  xi ;  Coinpl.  Wr.  i,  2";  Wit'deniaiiii,  A. .  _|-^ 
Zw.  Ins.,  ii,  r.5S.  30  (translation  from  Say) ;  Sehincr,  Novara  Exped.,  XA  .  7*^ 
Syrphuaseciiriferua  Macqnart,  Dipt.  Exot.,  ii,  2,  lOd,  22  ;  id.,  ibid.,  lor  Siippl,,:  '•"■•1"* 
(female).     (Typo  compared  by  Osten  Sacken.)  domten 

Sphacrophoria   Jiacchidcs  Walker,  List,  etc.   594.     (Typo  compared  by  0;  aegllien 
Sacken.)  browder 

Sinyhna   dimciinus  Walker,  Dipt.    Saunders.,  23,").      (Typo  comi)ared  by  Of  xl|- 

Sacken.)  . 

Sj/rphiig  Hifi)iahi8  v.  d.  Wnii),  Tijds.  v.  Ent.,x,  144,  l.'i ;  pi.  iv,  lig.  12.  ^^  ""®  ' 

Jlloqrapta  obliqua  Osten  Sacken,  liull.  Buff.  Soc.  Nat.  Sci.,  iii,  49;  Cat.  D;:<rf them 
12(5  and  note  214  ;  v.  d.  Wulp,  Tijds.  v.  Ent.,xxvi,  1,  33;  pi.  i,  lig.  1.        whbt  le 

Habitat. — Atlantic  and  Pacitic  States!  Argentine  liepnblic  (v,  broWnis 
Wnip).  with  tw 

5,9.  Length,  0  to  7""".  Face  yellow,  often  with  a  bluish  red.  ctihia^tai 
slightly  brownish  on  the  tubercle.     Frontal  triangle  yellow  ;  front  iniinej  st 


lUSKlIM. 


SYNOPSIS    or    NOIMII    A.Mi:i:i(  AN    svUI'lIlDiK. 


97 


ihifk,  witli  li. 
'lit   vcllow. 
IS  l>liu;U,  on 

llllCOllS,   Ii|i  , 

oils  ocliiai'cii 
8.  \Vni;;s  V 
Itli,  cUnuU'il  \\ 


htJ'd  to  the  ki 
spi'cit's,  ii(»t\v 
i  iimrkiiifis  of 
nay  perhaps  1 


Uttalcsliiiiiii;^'  Idack  on  tlic  vnicx,  ((iiiliiiiicd  a>  a  hiu.iil  slript-  (hroailt'st 
tNdow)  to  tilt'  aiitt'iiiia' :  on  tlic  siili'S  tlif  yellow  of  tli*>  lact'  coiitiiiiU's  up 
Ull^Ii^  tlii'  f.vcs  nearly  lo  the  ocelli.  Aiileiiiia'  it'ihlislihrown,  hiaekish 
^the  a|)iiei'  |iart  ol  i  !ie  thii'l  joint.  Thora.x  <h'ep  Nhiniii;;  Ki'*'*''><  <>'■  ^''^ 
ddeH  Willi  a  yellow  sliipe,  leaehin;,'  from  the  hiinieii  to  thesntiire,  where 
ittoshaiply  tnineate;  post  alar  callosity  also  yellow.  S'litellnni  wholly 
light  .\«'lh)w,  taiiitl..'  ledflish  on  the  disk;  pile  l»la«  k.  Alxlonicn  hlack, 
or  brown;  lirst  sej^iin'iil,  except  a  slender  traiisvers*'  spot  on  each  side 
bfcbind,  yellow  ;  se<'oiid  .sejjnu'nt  with  a  slender  yellow  anterior  fascia, 
and  a  Itroadcr  one  in  the  middle,  altoiit  a  third  of  the  width  of  the  se^- 
HWlt,  straijiht  and  Init  sli;;litly  widened  at  the  sides;  third  sef,'ment 
wftti  !'  Itroad  arcuate  hand,  not  cpiite  toiichinj;  the  jiosterior  anodes  on 
tll^sides;  fourth  si'j,'meiit  with  two  slender  parallel  stripes,  having;  a 
fllikth'i'  l>l;»('k  stripe  between  them,  on  each  sid<'  a  broader,  ol>li(pie,  oval 
lat  the  uialea:  gpijj^^  touchin;^,  or  narrowly  separated  from  the  aii'eiior  (  ed  of  tlieyel- 
l0#  hni<;itii<linal  strip*',  and  reachiii;,'  to  the  posterior  anjiles;  lifthsejj- 
Irtitlt  similar,  hilt  the  side  H]»ots  less  ohlitpie.  l.e^is  lif^lit  yellow;  last 
tbne. joints  of  all  the  taisi,  the  ifiiid  tihiie,  except  the  base  and  a  middle 
ring,  and  a  iiii;;oii  outer  jiart  (d'hiiid  femora,  brownish.  W'inj^s  hyaline, 
relllH  l>lack. 

Jk  widely  spread  and  common  species.  1  have  it  from  (Jonnectieut, 
New  Hampshire,  Iveiitiicky,  t'olorado,  Calilbriiia,  and  Washinjrton  Ter- 
ritory.    S(!hiiier  and  \'.  d.  Wulp  record  ii;  from  South  America. 

elli  as  ill  Sjirpl  JkJlOgrapta  fiacta. 

this  latter  aUil  Allmirniita  frucln  O^U-n  Sinkm,  \\\>\.  Diiii..  lilil. 

ua  Say.  JIfl/>//<//.— California  (().  S.) ! 

♦*i  .  liCiiiith,  7""".  Face,  including  the  frontal  triaiifile,  pale  yellow, 
slightly  oi)alefs{;eiit  ;  a  bluish-black  stripe  exteials  from  the  oral  edfje 

, ,.  to  the  antenme,  formiii''  a  semicircile  above  them.     Anreiina'  reddish, 

,     .     obliq'. 

n  to  tlio  iintcnr  thW  se>>inent   brown   alon<i:  the   upper  edjic,  vertex   black.      'I'horax 
frac: bright  Jiietalli*!  jjreeii,  a  jtale  yellow  strii)e  on  each  side  between  the 
hamcrus  and  the  root  of  the  wiii;;s;  antes(!utellar  [post  alar]  callosity 
^^-  jrellowish;  scutellum  of  a  saturate  yellow,  the  extreme  corners  dark; 

^^y'l*^,eT"rJ  ***^*®'^*'''^  with  yellow  knobs.     First  abdominal  sejiiiieiit  metallic  j^reen- 
ii)i(l    ler  Siippl.,  **^  ^^''*''^'  '^^^  tixtreuie  anterior  marj;in  only  yellow;  the  rest  of  the  ab- 
domen l)hick,  opacpie;  an  interrupted  yellow  cross  band  on  the  isecoiid 
compared  by  Orsegllienr  e<pial  to  about  one-third  the  se<;iiient  in  breadth  ;  a  sonu'what 
broader,  slij;htly  arched,  and  not  interrupted  yellow  cross-band  on  the 
coinparedljy  O-^jjjj^g^.^iii^^iij  .  ^^^^  the  fourth,  two  narrow,  paiallel,  loii-iitudinal  lines 

iv  li"  12.  ^^  ^^  middle,  and  an  obli(piely  jilaeed,  lar^^e,  oval  spot   on  each  si(b' 

.,iii,  49;  Cat.  D:of  them,  yellow;  the  narrow  tifth  .segment  shows  a  yellow  pi(;tnre,  s(»me- 

,  pi.  i,  lig.  1.       whkt  rcsembliny  that  of  the  fourth  segment.     I^cgs  yellow  ;  tip  of  tarsi 

5  liepublie  (V,  brownish ;  hind  femt)ra  with  a  brown  rinj^'  before  the  tij*;  hind  tibiae 

with  two  such  rinji's,  one  before  the  middle,  the  other  before  the  tip; 

bluish  retl.c'tihinci  tarsi  brown,  excei)t  the  under  side  of  the  first  joint.     Wings  hya- 

How;  front  in  :line;  stigma  brownish  yellow. 


Id7«i. 

iteral  stripes.- 
til  segments  w 
sin  the  male  w 


''I  !■■'■''! 


r 
1 

1     I 
i  i,l   .V 

'     1   '  1 

:    1 

1 

1  ,j;,l  li 

'    i 


;> 


u: 


98  BULLETIN   31,    UNITED    STATES    NATIONAL    MUSEUM. 

^^  Hahifat. — Siuita  ]Moi»i(ia,  Califonii.'i,  February  20,1876.     A  sin? 
male." 

The  chief  differences  thar  this  description  shows  from  A.  obliqua 
in  the  bhick  stripe  on  the  fsKie,  and  the  first  abdominal  segment  b«: 
black. 

MESOGRAPTA. 

Toxomerm  Macquart,Di|it.  Exot.,  ."ic  Suppl.,  9'.J,  1855, 
Meitof/ramma  Loew.Centur.,  vi.  47,  IHOr*. 
Meaiv/rapta  Loew,  Ceiitur.,  vol.  ii,  ji.  "jyO,  1872. 

Small,  somewhat  ehmpate  species,  thinly  pilose,  shining  black,  r 
3'ellow  markings  on  head,  thorax,  and  ab<lomen.  Head  hem)s]i|, 
ical,  face  small,  sliort,  prominent  in  the  nuddle.  Aiitenna3  sitiw' 
near  the  middle  of  the  head  in  i)rotile,  sliort,  third  joint  oval,  an. 
basal,  bare.  Eyes  narrowly  contiguons  in  the  male,  midway  betw^ 
the  antennae  and  ocelli ;  vertical  triangle  long,  acute;  front  in  fem. 
longer  than  the  face,  narrowed  toward  tlie  vertex.  Ocelli  in  both  sti 
remote  from  the  vertex.  Dorsum  of  "thorax  with  a  median  ciiicivi 
linear  stripe  and  lateral  yellow  margins.  Scutellum  black,  with  yd 
border.  Legs  rather  slender ;  hind  femora  in  the  male  somctii: 
thickened  and  arcuate.  Wings  as  in  Syrphus.  Tyi)e  of  genus,  M.}' 
vula  Loew,  Xorth  America. 

The  sj)eciesare  very  variable  in  the  coloring  of  the  abdomen,  anch, 
tion  should  be  used  in  founding  new  species  on  such  differences.  . 
deed  here,  as  elsewhere  in  this  family,  specific  characters  are  usu;; 
more  or  less  doubtful  when  not  based  upon  some  structural  diffcreii 

TABLE  OF  SPECIES. 

1. — Hiud  femora  in  nial*<  tliickencd  and  arcuate,  the  tibiaj  dilated  at  ti])    .     gemii 

Hind  femora  in  m.'ile  «imj>lo 

2. — Scutelliiui  yellow  ;  legs  yellow,  except  the  hind  tarsi Soh 

Scutellnm  black  with  a  yellow  margin;  front  of  female  much  narrowed  ;r  r* 

hind  femora  in  part  bluck parvula,  Bci  ^^p,,j 

Scutellnm  black  or  biowti   witln   a  yellow  border;  front  of  fennile  above  i:  ^^ 

little  narrowed;  hind  femora  wholly  yellow marginata,  __^ 

3. — Front  of  female  only  a  littlt!    narrowed  above;  third-fifth  abdominal  .-f^t  VWiex 

■with  narrow  lateral  yellow  margins maigiE  p|i|tei' 

Front  of  female  much  narrowed  above;  third-fiftli  abdominal  segmeutu  iH';  4t|j^in( 

low  on  the  margins pc  m^p  ^ 

For  other  species,  see  descriptions,  and  also  appendix.  shitiin 

Mesograpta  polita.  Whitis 

Scava  polita  Say,  J.  Acad.  Phil.,  iii,  08;  C.    ipl.  Wr.,  ii,  77.  With  a 

Syrphua  politus  Say,  Amer.  L,utoiu,,  i,  pi.  xi,  <ig.  3  ;  Wiedemann,  Anss.  in6tlt, 

Ins.,  ii,  i:w,  5i8.  hand 

Syrphnu  viiujulniuhin  Maccjnart,  Dipt.  Exot.,  4e  Snpi)l.,  155,  53.     (Typo  roiir     Ka^ 

by  Onlen  Sacken.)  , 

Syrphus  heclirua  Jaennickc,  Neue  Exot.  Dipt.,  90.  ^^  **' 

Habitat. —  North   Carolina,   Kansas,  Connecticut,  Georgia!,  d    ^m^^' 
(O.S.).  ^     '       limer. 


[USEUM. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDA:. 


99 


1876.    A  sin; 

im  A.  obliqua ; 
I  segment  bei: 


iniiig  black,  r 
[lead  lieniisjiL 
LiitcniiiU  situa; 
joint  oval,  ail' 
midway  betw^^ 
;  front  in  iein. 
i;elli  in  both  sci 
median  cinciii 
)lack,  with  ye! 
:  male  sometit 
of  genus,  .1/.  ]' 

ibdonien,  aiuU 
li  dift'erences.  '. 
acters  are  usii;: 
cti'ral  difi't-Tt'iir 


I  at  tip    .    gemb 


null  iiiirrowt'lt  n' 
.    parvula,  Bc; 
friiiiilo  above  v: 
,    marginata 
abdoiiiiual  Kf;;i: 
.     .     maigii. 
Qal  Bi'gmeutH  im: 
.     .     .    .    Pt- 

Llix. 


fiedemanu,  Auss. 
53.    (Typo  com; 

,  Georgia!,  t 


'■}  3,5.  Length,  8  to  9™™.  P'uce  yellow,  with  whitish  dust  on  the  sides, 
gntennai  a  little  more  reddish  yellow,  narrowly  brownish  or  blacldsU 
albK)ve.  Frontal  triangle  yellow ;  vertical  triangle  black,  poUinose  in 
ftOnt  of  tiic  ocelli.  Front  in  female  black,  rather  thickly  yellowish- 
Whitisli  i)ol!inose;  on  the  sides  below  the  ocelli  narrowly  yellow.  Oc- 
ciput grayisli-y«'ll()wish  pollinose,  silvery  on  the  sides.  Median  cin- 
ereous ,strij)e  of  tiiorax  very  distiii(;t ;  on  the  upper  border  of  the  yellow 
lateral  stripe  indistinctly  glaucous  green;  between  these  and  the  niid-^ 
die  stripe  the  color  's  brownish  or  olivaceous,  iiidistin(ttly  divided  by  n 
ctoereons  line,  the  beginning  of  which  in  fiont  is  dilated  and  very  dis- 
^ct.  Plennc  shining  nictallic,  with  three  yellow  spots,  viz.,  one  ou 
t&e  meso,  one  on  the  sterno-pleiira',  and  one  above  the  front  coxte, 
smaUcr  tiian  the  others.  Scntellnin  wholly  yellow,  somewhat  reddish 
<^  the  disk.  Abdomen  shilling  black;  first  segment  yellow  at  the  base 
mid  si(l«'s;  si'(!on(l  segment  with  a  broad  median  entire  yellow  cross- 
tlJiDd  ;  third  and  foirth  in  the  female  with  'i  narrow  yellow  anterior 
birder,  and  a  slender  median  line,  passing  thi'ongii  the  rather  narrow 
ilrterrnptions  of  the  rather  broad  Uicdian  yellow  cross-bands;  fifth  seg- 
miut  yellow,  except  two  rectanguhir,  ])arallel,  more  or  less  continent 
tlHilck  spots.  In  the  male  the  third  und  fourth  segments  are  yellow  or 
yullowish  red,  except  a  pair  of  black  luie.-,  on  each  side,  like  the  three 
d^es  of  a  square,  more  or  less  indistii.'it ;  fifth  segment  and  the  liy- 
pjpyginm  wholly  yellow.  Legs  bright  yellow;  hind  tarsi  reddish,  tlu^ 
terminal  joints  blackish.  Wings  nearly  hyaline,  the  stigma  dilutely 
ydlow. 

Thirty  sjiecimens. 

li*BOgrapta  parvula. 

M(n(><irninmti  ptirnila  Loew,  Centiir.,  vi.,  47. 
.)fexo(irai>tti  jKirriila  Ostvn  Sacl^on,  Cat.  Dipt.,  125. 

irfl/>(7f//.— Georgia!,  Florida  (Lw.). 

d,?.  Length,  5  to  0""".  Black,  somewhat  metallic.  Face  yellow, 
rilVery  i)ollinose  on  the  sides.  AnteniKc  yellowish^  somewhat  infuscated. 
Front  in  female  very  narrow  al)ove,  shining  greenish  black,  bronzed  at 
veiftex,  yellow  on  the  sides  below  the  vertex.  Cheeks  black;  lateral 
POSteiior  orbits  silvery.  .Median  dorsal  cinereous  stripe  only  moderately 
dirtinct,  on  either  side  of  which,  and  more  outwardly,  separated  by  a 
more  shining  >,tripe,  a  second,  morcolivaceous,  less  shining  one.  Pleural 
shining  bluish  black  with  a  yellow  spot  on  the  mesopluraj,  and  a  more 
whitish  one  below;  no  si)ot  above  the  front  coxae.  Scutellum  black, 
with  a  yellow  margin.  Abdomen  black  ;  o])aque,  excejjt  the  tirst  seg- 
ment, an  anterior  and  jwsterior  band  on  the  second,  and  a  posterior 
band  on  the  following  segments,  shining;  yellow  markings  as  follows: 
base  of  the  first  segment,  sometimes  a  .slender  band  on  the  second,  en- 
tire or  interrupted,  a  broader  anterior  liand  on  the  third  and  fourth 
segments,  inteiini)ted,  and  jjroduced  into  a  process  posteriorly  at  the 
inner  ends;  in  the  interrupted  spaces  a  slender  longitudinal  stripe;  on 


ii 


^li.U.*Jt.f»*- 


•i 


I    I' 


',<    I' 


11  .■' 


Ml 


,  t'l'  ', 

'  >Vil'  A' 

f  !|!  F 

:  ill  I'!': I 


,    ,  V  III 

'til 


I 
II 


[I 


■'1 


I-  (!:■ 


'    I 


100 


IJUIiLETIN    31,    UNITKD    STATES    NATIONAL    MUSEUM. 


tlio  fifth  si'i^riKMit  ti  broiully  intcriiipti'd  lasciii,  in  the  male  iiioie  sl('ii(l> 
Ih.m  in  tin'  female,  son>etinies  yellow  with  three  lar^i'  oval  l(»n,iiitn(liii,. 
Rpots.  Lei:s  yellow;  hiinl  femora  with  a  ralln-r  broad,  preaijical,  lihn, 
riu,i>';  the  hind  til)iic,  exc'ei)tthe  base  and  tip,  blaek;  hind  tarsi  iikhii, 
less  reddish,  blackish  toward  the  tip.  Winjjfs  m-aily  hyaline,  siiyn, 
hnbinseous. 

Oiie  male  and  two  female,  sj)ecimens  from  Georgia.  Tiie  males  liav- 
IIk-  abdomen  obsctnrely  brownisli  reddish  beyond  the  second  sejji'iiicn; 
Avitli  narrow  indistinct  blackish  nnirkinjis.  From  .1/.  (iciiii)t<ifa,  \\\\'\r[ 
it  closely  resembles,  it  may  be  distins'nished  l)y  the  hind  femora,  wlm 
are  |)erfectly  straight,  and  somewhat  compressed,  not  curved  an; 
cylindrical;  the  fifth  abdominal  segment  is,  in  the  female,  in  iJ/.j>«rti(!i 
much  longer  i)roj)ortionally  than  in  .1/.  geminufa. 

Mesograpta  marginata. 

hmera  marfjinata  Say,  J.  Acid.  Phil.,  ii,  92,  (i;  Coiupl.  Wr.,  ii,80. 
Sijrphm  maryinutiiH  Wiedcmanii,  Aus.s.  Z\v.  Ins.,  ii,  14(5,  52. 
Mes<t(/ramma  plaiiivcnIriH  Loew,  CiMitur.,  vi,  40. 
iS.  •phii/<  Qiiinlhm  Walker,  Dipt.  Saundors.,  '231). 
Mrsoi/rapta  marffinata  Oaten  Sackcii,  Cat.  Dipt.,  12.'>. 

Habitat. — Atlantic.  Southern,  ^Middle,  and  Pacific  States! 

9.  Lengtli,  5  to  (»""",  Face  whitish  yellow,  thinly  poUinose,  chcel 
black.  Antennae  reddish  yellow,  a  little  fuscous  above:  arista  blad 
Front  oidy  moderately  narrowed  above,  greenish  black,  shining  at  rt 
vertex,  lightly  yellowish  pollinof>v.  below;  on  the  sides  below  the  oc({ 
jiarrowly  yellow  like  the  face;  posterior  orbits  yellowish  ])ollinosi', ; 
some  retlections  silvery.  Dorsum  of  thora.x  olivaceous  black,  but  lit; 
(shilling,  median  cinereous  stiipe  distinct,  bordered  nai'iowly  on  la 
side  with  brownish;  ideumii  shining  greenish  black  :  beside  the  ycllr 
spots  on  the  me.so  and  sterno  pleura',  there  is  a  third,  minute  one.  iilm 
the  front  cox;x3.  Scutellum  yellow,  with  black  ])ile.  Abdomen  blar^ 
shining,  narrowly  margined  with  yellow  ;  oval,  tlatteiu'd  ;  first  segiin: 
at  the  base,  second  segment  with  a  median  cross-band,  thiid  a' 
fourth  segments  each  with  a  median  line  and  a  somewhat  oblicine  lai. 
spot  on  each  side  attaining  the  base  of  the  segment,  fifth  segment  wi  ' 
two  oblique  spots  conlluent  at  the  tip,  yellow.  Legs  ye!low,  the  lii:, 
tarsi  a  little  brownish,  blackish  at  the  tip.     Wings  nearly  hyaline. 

This  description  applies  to  twenty  specimens  from  Xew  York  ai 
Connecticut,  which  agree  quite  with  Say's  descrii)tion,  and  hence  iii; 
be  considered  as  the  typical  marcjinata.  This  species  is  variali 
scarcely  any  two  specimens  being  preciselyalike  in  tlie  abdominal  inai 
ings,  which  makes  it  seem  strange  that  Loew  should  base  a  species  up' 
such  characters.  The  head  in  the  male  ditfers  only  in  the  frontal i: 
angle  being  yellow  and  the  vertical  triangle  black.  Of  the  diflVn 
variations   in  the  abdomen  the  following  are   such  as  my  specinu'^ 


show 


Ten  specimens  from  Colorado,  all  males,  are  rather  smaller  than 


Eastern  specimens  and  have  the  scutellum  wholly  yellow,  excei)t 


\  lai; 


JSEUM. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHID^. 


101 


Ic  iiioie  sIcikI, 
•ill  lonjjjitudiii,; 
ircapiciil,  lilar, 
(1  tarsi  iiKucii 
lyulino,  sti<;ii). 

riie  males  liav. 
I'COlid  St'<>lil('!i: 
niii)utia,  wliii; 
,  leiMora,  wim. 
i)t  curved  aiL 
e,  iu  M.parm 


,80. 


,tes ! 

lUiiiose,  clicet 

.':  arista  blafl. 

.  shiiimj''  at  t[ 

below  the  ooc: 

sli  i)()llinosf. : 

black,  but  lif 

I'l'owly  on  i;ii 

side  tiie  yell 

iiute  one.  ;ili" 

^.bdonien  lil.H'. 

lirst  si"j:m-: 

md,  thii'l  ir 

t  ()l)li(iue  lai; 

h  segment  wi' 

«!lo\v,  the  lii: 

ly  liyalint'. 

New  York  a: 

and  hence  iiu 

es    is  variaV. 

bdoniinal  mar 

e  a  species  u]' 

the  front  all: 

)r  the  dinii. 

;   my  speeiiiK: 

mailer  than  i 
^•,  except  a  k. 


leddish  color  on  the  disk,  the  yellow  band  of  the  second  abdon)inal 
«egiuent  rather  broad,  and  the  tiiird  and  following  segments  wholly 
Obscnrdy  reddish  yelh)w,  except  a  small  circular  black  spot  on  the 
middle  of  the  lifth  segment;  on  two  of  these  are  small  ob.scure  blackish 
marks  on  the  third  and  fourth  segments.  Three  more  males  from  Colo- 
rado and  four  from  Western  Kansas  have  the  black  longitudinal  and 
transverse  si)ots  very  distinct,  so  that  in  most  of  them  the  yellow  is 
oouflned  to  oblique  spots  nearly  as  in  the  typical  forn;.  A  single  fe- 
male from  Colorado,  another  from  Montana,  and  several  from  Western 
Kansas,  have  the  oblique  spots  of  the  third  and  fourth  segments  coales- 
'oent,  leaving  only  two  minute  spots  in  the  middle  near  the  front,  and 
in  the  tifth  segment  there  are  a  circular  median  sjiot  and  two  obliipie 
feteral  elongated  ones;  others,  females,  have  the  yellow  spots  distinct, 
|iB  in  the  typical  form. 

In  several  female  specimens  from  Georgia  and  Florida  the  abdomen 
ll  cliietly  black,  the  first  segment  nearly  wholly  so,  tin?  second  either 
holly  black  or  with  two  small  yellow  sjjots,  and  the  yellow  triangles 
the  following  segments  small  and  slender;  in  some  the  scutellum  is 
^stinetly  darker  above,  in  one  almost  blackish  on  the  disk;  the  speci- 
iien  tVom  Mcwitana,  however,  shows  the  same  blackish  color,  and  here 
ilie  ,m11()w  s|)()ts  of  the  abdomen  are  confluent.  A  «lozen  other  speci- 
liens  from  (Jeorgia  and  Florida  present  no  essential  dilfereiices  from 
IJ^e  Western  and  Noi'thern  ones.  Specimens  from  the  White  ]Mountains 
lire  precisely  similar  to  the  tirst-mentioned  males  from  Colorado,  and, 
||ence,  it  is  probable  that  such  specimens  will  usually  be  found  in  high 
latitudes  or  latitudes.  Specimens  from  Connecticut  agree  with  all  the 
liariations  i)reviously  mentioned;  others  from  Washington  Territory  and 
^aliloiiiia  otl'er  no  peculiarities. 

i|  1  have  no  doubt  from  the  study  of  the  material  here  described  that 
ManiroitriN  is  purely  a  synonym  of  mnnjiiiata.  The  only  point  in  which 
8l»ai)pears  to  ditter  from  the  typical  varieties  is  in  the  greater  amount 

f  yellow  on  the  abdomen, — the  bla(!k  on  the  third  and  fourth  segiiuMits 
nfined  to  two  median  spots  and  a  posterior  interruftted  transverse 
Opind  dilated  at  the  angles,  and  the  lifth  segment  with  only  a  single 
flpot.  Such  specimens  occur  in  Connecticut  ami  Colorado,  as  well  as 
Ilorida,  whence  the  species  was  described. 

One  female  si)ecimen  from  Connecticut  and  two  from  Calitornia,  al- 
tiiough  otherwise  not  diftering  from  the  more  typical  form,  have  the 
BCUtellum  a  deep  shining  black,  narrowly  edged  with  yellow.  There 
are  so  many  interntediate  forms  that  this  character,  though  a  striking 
one,  is  not  of  specitic  value. 

\  Two  liuile  specimens  from  Floiida  (Professor  Iviley)  have  the  abdomen 
wholly  reddish  yellow,  except  two  small  spots  o'>  the  tirst  segment.  I 
WQ  not  sure  that  they  belong  to  this  species. 


102 


BULLETIN    31,    UNITED    STATES    NATIONAL   MUSEUM. 


'ii    ;l- 


I'i'i 


fii  I 


,1     ! 


V      I 


!i.  r 


n 


) 


m 

m 

iV  I  I' 


I 


;V    I 


i  ! 


Ujl! 


u^ 


I ,  I 


Mesograpta  geminata.    (Piatt-  IV,  fijjs.  5,  'm.) 

Scaeva  finnhiala  Say,  J.  Acad.  Pliil.,  iii,  92,  7;  C 'iipl.  Wr.,  ii,  80. 

Si/rphiia  gcminatiiH  Wiedomann,  Auhh.  Z\v.  Ins.,  ii,  145,  50. 

Si/rpliu8  iiilfrroiiaim  Walker,  Dipt.  Sauiitl.,  238. 

EiiiHvru8 privcriiun  Walker,  I.e.  •225, 

Toxomcrui  iiottitiis  Maciiiiart,  Dipt.  Exot.  5"  Suiipl.,  93,  pi.  v,  fig.  4. 

llrnifirnmina  nomhiala  Scliincr,  Novara  Expt'd.,  347,  note. 

Miyot/ropta  qduiiiata  O.  Siickcn,  Bull.  JJiiiV.  S<ic.  N.  Scl.;  Cat.  Dipt.,  125. 

TojromeriiH  fjemwaius  WilliHtoii,  Pi'oc.  Am.  Phil.  Soc,  xx,  310. 

H'tbifat. — Atlantic  and  Pacjilic  States!,  Soiitl'  Aiiiorica  (Scliin(M-). 
3,  9.  L{Mijj,tli.  5  to  ()""".  Face,  frontal  trian.ylc,  and  aiitiM'iifp.li;;' 
yellow,  the  face  witli  white  pollen  on  the  sides,  the  antenna;  soinetiiiu's 
little  brownish.  Front  in  female  nnich  inirrowed  above,  shininji'  hliui 
narrowly  yellow  on  the  sides  on  the  lower  half.  Posterior  orbits  thick! 
whitish  dusted.  Dorsum  of  thorax  shininj;  black,  with  opafjiie  liiu. 
strii)cs,  the  lateral  stripes  entire,  the  median  cinereous  strijte  only  ino' 
erately  distinct.  Pleurae  shining  {;reenish  black  ;  an  oval  yellow  spi 
on  the  uieso-pleuriB,  and  n  smaller  more  whitish  one  below  it,  narrow; 
separatti.  Scutellum  with  an  entire  yellow  margin.  Abdomen  bro*. 
est  at  the  tip  of  the  third  segment;  broadly  flattened  oval  in  the  feiimlt 
shining  black,  variable,  usually  with  yellow  markings  as  follows :  lih 
segment  at  the  base;  second  segment  with  a  narrow  median  cro> 
band,  attenuated  in  the  middle  and  interrupted;  third  and  fourth  st. 
ments  with  a  slender  median  stripe,  broader  toward  the  front,  and 
pair  of  large  spots  on  the  anterior  margin,  on  the  third  dilated  bebii 
on  the  ends;  on  the  fourth  rather  deeply  marginate  on  each  side  li 
hind,  the  ends  rounded  and  extending  backward;  fifth  segment  wi: 
the  anterior  angles  yellow  and  sometimes  two  projections  from  the  a: 
terior  margin  near  the  middle ;  hypoj)ygium  reddish  yellow,  on  thek 
above  shining  bla(!k.  In  other  specimens  the  yellow  cross-baud  of  tt 
«ecoud  segment  may  be  contined  to  a  small  spot  on  each  side  or  wlin! 
wanting,  the  median  stripe  of  the  third  and  fourth  segment  wbol 
wanting,  on  the  fourth  only  four  small  anterior  spots,  those  on  the  a; 
terior  angles  of  the  fifth  very  small,  and  the  hypopygium  almost  wlinl! 
black.  Front  and  middle  legs  yellow;  hind  femora  black,  except  tl 
base,  in  the  female  less  extensive,  often  only  a  brown  ring;  hind  tihi 
indistinctly  biaunulate  with  brown;  and  the  hind  tarsi  brownk 
Wings  nearly  hyaline,  veins  mostly  black. 

Twelve  specimens  from  California,  Washington  Territory,  and  Co: 
Mecticut. 

Mesograpta  auiulenta,  n.  h]). 
Habitat. — San  Domingo! 

3  .  Length,  .■).5""".  Face  and  frontal  triangle  light  translucent  vt 
low  ;  cheeks  narrowly  shining  black,  behind  and  on  the  j)ost<'rior  orlc 
with  a  greenish  tinge,  (covered  with  light  ,velh)wish  i»o]len.  Eyes  l)iiii: 
contiguous;  vertical  triangle  black,  elongate;  o(;elli  remote  from  tluM'^ 
tex.    Autennieyollow ;  somewhat  blac  k  ish  above.    Lateral  stripes  oiil 


raxei 
utripi 
elong 
Scutt 
'  red, ( 
first 
with 
large 
hiud 
aoal; 
brow 
Willi 
9. 
yelh» 
spot 

third 

(Begni 
nairo 

Fo' 


lUSEUM. 


ii,  80. 


,  fig.  4. 

t.  Dipt.,  125. 

I. 

(Ml  (Scliiiior). 
(1  aiitiMMifpJi;'; 
iiiai  soiuetiiiH'> 
?,  sliiiiinji'  bl;n, 
ior  orbits  tliitkl 
\h  opiiqiie  lint. 
striiK'  only  iiuk 
oval  yellow  .sp' 
;low  it,  narrow: 
Abdomen  biw 
•al  in  the  fcinali 
as  follows :  tit. 
w  median  ci> 
[  and  fourth  si/, 
the  front,  and 
d  dilated  bcbii 
on  each  side  l^ 
h  sefjnient  \vi: 
)ns  from  the  a. 
'How,  on  the  111 
ross-band  of  ti 
h  side  or  wlinl 
segment  wbol 
those  on  the  a; 
m  almost  wliol 
lack,  excej)!  ti 
'h\g',  hind  tili; 
tarsi   bro Wilis 

ritory,  and  Cu: 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


103 


translucent  vt 

l)Osterior  oi'lr 

n\.     Eyes  hiict 

ote  fioni  tiuM'^ 

fal  stripes olii 


rax  entire,  yellow;  dorsum  black,  but  little  shining,  with  three  olivaceous 
Htxipcs,  separated  by  about  their  own  width  ;  pleune  shining  black,  an 
elongate  spot  on  the  mesopleune,  and  an  oval  one  below  it,  yellowish. 
Scutollum  black,  with  a  narrow  yellow  Itorder.  Abdomen  yellowish 
'  red,  or  reddish  yellow,  with  u  briLilit  golden-yellow  metallic  rellection  ; 
first  segment  more  biownisli.  Ia'}X!<  reddish  yellow;  front  femora 
with  a  siiKil!  l)la(!k  s|M)t  above  iieiir  tliel)ase;  ui'ddle  femora  with  a 
largt-r  s])(it  in  tile  saim?  placi',  and  the  last  two  joints  of  the  tarsi  black; 
hiud  lenioia  with  two  incomplete  black  rings,  one  basal  and  one  preap- 
ioal ;  liind  tibiai  also  with  two  narrow  black  rings;  hind  metatarsi 
brownish,  and  the  last  two  joints  of  tarsi  black;  hind  femora  thickened. 
Wings  lightly  tinged  with  dark  ;  third  vein  gently  sinuate. 
V$.  Front  shining  black,  narrowly  yellow  on  the  sides.  Abdomen 
yellowish  red,  but  little  shining  ;  the  (irst  s(>gment  on  t\w.  sides,  asmall 
spot  ill  the  niid<lle  of  the  se(!ond  segment  behind,  and  a  minute  one  on 
flf^;h  of  the  following  segments,  all  sometimes  obsolete,  black  ;  second, 
third,  and  fourth  segnu'uts  with  narrow  hind  margins,  and  the  tifth 
eegnieiit  wholly,  shining  metallic  golden,  as  in  the  male.  Front  much 
nai'rowe<l  above;  face  with  a  l>road  median  black  stripe. 

Four  sjiecimens  (two  3  and  two  2  ),  San  Domingo  ((1.  F.  Frazar). 

Jfesograpta  Boscii. 

Siirphiin  lioHcii  M;tc<iiiai't,  Dipt  IvKot.,  ii,  ■»,  |(i;l,  -IW;  |)1.  xvii,  lig.  2. 
Sfirphnx  Giinjci  Walker,  liipl.  .Samxlurs,  'S.M  (Ostoii  Hackt'ii), 

Ilahitaf. — Carolina  (Macq.),  Alabama,  Florida  (().  S.). 

9  .  Length, ."»""".  Thorace  nigro,  lateribus  tlavis ;  scutello  nigro,  rufo- 
iniirgiiiato.  Abdomine  rufo,  nigro  variegato.  Femoril)us  i)osticis  annulo 
ftttco.  Face  courte,  i)roeminente,  jaune;  cotes  a  duvet  blanchatre. 
Eront  d'un  noir  bleuatre  luisant,  borde  de  fauve.  Antennes  fauves. 
Abdomen  ovalaire  alonge;  premier  segment  noir;  deuxic'  e  a  moiti6 
ai|t<^rieure  fauve,  posterieiire  noire;  troisieme  et  quatrieme  fauves,  k 
bande  dorsale  noire,  rentlee,  arrondie  vers  le  bord  anterieur  et  divivs6e 
par  line  ligne  fauve,  elargie  an  bord  posttirieur;  ce  bord  noir,  6mettant 
46UX  rameaux  triangulaires  de  chaque  cote;  cinquieme  fauve,  {\  trois 
lignes-noires,  longitudinales.  IMeds  jaunes:  cuisses  posterieures  -X  an- 
neau  bruu  pr6s  de  I'extremite;  jambes  posterieures  -X  deux  anneaux 
btunatres  pen  distincts.  Ailes  un  jieu  Jannatres;  cellule  basilaire  ex- 
twne  sY'tendant  jusqu'au  tiers  de  la  discoidale. — Macquart. 

Thorax  black,  the  sides  yellow;  scntellnm  black,  margined  with 
yeUow.  Abdomen  red,  variegated  with  i)lack.  Hind  femora  with  a 
blown  ring.  Face  short,  jirominent,  yellow;  the  sides  white  dusted. 
Front  shining  bluish  black,  yellow  on  the  sides.  Antennre  luteous. 
Abdomen  elongate  oval;  lirst  segment  black;  second  on  the  anterior 
half  luteous,  posterior  half  black;  third  and  fourth  luteous,  with  a 
black  stripe,  dilated,  rounded  near  the  front  l)order  and  divided  by  a 
iuteous  line,  enlarged  at  the  hind  border,  the  hind  border  black,  emit- 


i 


104 


i5i:lli-:tin  :3i,  united  states  national  museum. 


tinj^f  two  triaiif^nilii)'  braiiclics  on  each  side;  fifth  Intcous,  with  three 
black  linear  stripes.  Legs  yellow;  hind  femora  with  a  brown  ring 
near  the  tip;  liind  tibiiT)  with  two  indistinct  brown  ings.  Wings  a 
little  yellowish. — Translation. 


h  ^.J 


II  i<  I 


i<  ?S 


I'm 


ADDITIONAL  NORTH  AMKlilCAN  SPECIES. 

Mesograpta  anchorata  Onfcii  Sackcii,  Cat.  Dipt..  \2'i. 

^rjj/n/s  a  II  ell  oral  II  n  Mac(iiiiirt,  Dijit.  Exot.,  ii,  '2,  'J7  ;  tab.  xvi,  fig.  8. 
Mesograpta  arcifera  Loew,  Contiir.,  vi,  iVi.— Cuba. 
Mesograpta  basilaris  v.  d.  Wiilp,  TiJdHclir.  v.  Eiitoiii.,  xxvi.— Guadeloupe. 

Sjirphiin  biiniluriti  Wii'dcinanii,  Aiiss.  Z\v.  Ins.,  ii,  Mli,  4"'. 
Mesograpta  ectypiis  Ostcu  Saokcii,  Cat.  Dipt.,  I'J."). — Cuba. 

Sijr)ihun  vctjipitH  Say,  J.  AcacL  Phil.,  vi,  Ki.'),  H;  Couipl.  Wr.,  ii,  ISiVJ, 
Mesograpta  laciuiosa  Loow,  Contur.,  vi,  .^0. — Cuba. 
Mesograpta  linearis  v.  d.  Wulji,  T'Jdsclir.  v.  Eutoni.,  xxvi. — Mexico. 
Mesograpta  miuata  Ostcu  Sackcn,  Cat.  Dipt.,  l^."). — Cul»a. 

Siirpliun  miniitiiM  Wiedcniaini,  Au.ss.  Z\v.  Iuh.  ii,  140,  Brazil ;    Biffot  iu  K.  de  la 
Sagra,  etc.,  80(i. 
Mesograpta  multipunctata  v.  d.  Wulp,  Tijdsclir.  v.  Entoni.,  xxvi. — Guadeloupe. 
Mesograpta  poecilogastra  Locw,  Centur.,  vi,  al. — Cuba. 
Mesograpta  pulchella  0.stcii  Sackcn,  Cat.  Dipt.,  1"^;'). 

Syrpliiin 2>iilchelhm  Mactiuart,  Dijit.  Exot.  Icr  Su])pi.,  138,  liti;  tab.  xi,  fig.  12. 
Mesograpta  subannalata  Loew,  Centur.,  vi,  if*. — Cuba. 
Mesograpta  variabilis  V.  d.  Wulj),  Tijdsclir.  v.  Hntoni.,  xxvi. — Guadeloupe. 


.  (!' 


SPIIyEROPHORIA/ 


«Si/)/icBro^>/ioria  St.  Fargeau  and  Scrvillc,  Encycl.  Metli.,  x,  513,  1825;  Macqnart, 

Dipt.du  Nord.  18'.;i>. 
Melithreptus  Loew,  Oken's  Isis,  1S40,  57:5. 

Slender,  small  species,  of  a  bhiclv  or  metallic  green  color,  with  yellow 
abdominal  bands  and  yellow  lateral  stripes  on  the  thorax.  Anteiuiic 
short,  a  little  remote  at  their  base,  tliird  Joint  oval,  arista  dor.sal,  bare, 
or  slightly  pubescent.  Face  l>elow  son^ewhat  projecting,  lightly  tuber- 
culate,  yellow,  with  or  without  a  median  black  stripe.  Eyes  bare,  con- 
tiguous iu  the  male;  ocelli  remote  from  tlie  vertex.  Thorax  with  yellow, 
interrupted  or  entire,  lateral  stripes.  Sciitelliuii  y«'llow.  Abdomen  slen- 
der, elongate,  pointed  at  the  tip  in  the  emale,  clubbed  with  projectin{( 
hypopygi  im  in  the  male  (ex(!ept  «S'.  micrura).  Legs  slender,  simple. 
Wings  in  the  male  often  shorter  than  the  tdxlomen;  neuration  as  in 
Syrphus.     Type  of  genus,  *S'.  avripta  Linnd. 

Tliis  genus  is  a  very  difficult  one,  and  1  have  not  attempted  its  thorough 
solution,  which  must  be  left  to  the  monographer  with  an  abundance  of 
mtiterial  at  his  disposal.  In  Europe  much  uncertainty  yet  prevails  as 
to  the  specific  characters. 

*  Sep'iiiJO'-,  sphere;  ipopii,  bearing. 


SYNOPSIS    OK    XoinU    AMERICAN    SYRPHIDiE. 


ior> 


TABLK  OF  SPECIES. 
1  _|lYj)oiiyK'""' ^''"'y  •""""  '  L'oxio  aud  UaHi)  oi"  femora  black micrura 

H.vi>ni'y;ii'""  '"''w 2 

2.— C'oxu!  iiiid  liiisi!  of  ftMiiora  blackish melaaoaa 

C'oxic  oral  least  femora  not  lilackisli  (^  ) 3 

3,_H,v|ioi).T;;iiiiii    with   a    tuft   of  yellow    pile    below   the   globular   part   in   front, 

cylludrica 
Hypopy^rinm  without  such  a  tuft,  base sulphuripes 

For  other  species  see  descriptions. 

Sphcerophoria  cylindrica.     (Plate  IV,  tigs.  1(5,  ICa.) 

SiirpliHH  v.iilhuh-ivHK  Say,  Amcr.  Eiit..  i,  pi.  xi ;  Compl.  Wr.,  i,  22;  Wiedemann, 

Au.sH.  Zw.  Ins.,  ii,  1:}H,  :W. 
Sphocrophoria  coniUina  Maccpiart,  Dijit.  Exot.,  2"  Suppl.,  (j2,  4. 

Habitat.— "Sgw  England,  Washington  Territory! 

<?.  liCngth,  8'"'".  Face  and  front  light  yellow,  shining;  tubercle  ami 
anterior  oral  margin  .somewhat  fuscous.  Antenna)  reddi.sh  yellow, 
brownish  above  on  third  Joint.  J)orsuni  of  thorax  dark  greenish  oliva- 
ceous, somewhat  shining,  with  an  abbreviated  lateral  yellow  stripe; 
pleurie  deep  shining,  somewhat  bluish  black,  with  light  yellow  s[)ots, 
Boutelhnn  sulphur  yellow.  Abdomen  slender;  tirst  segment  black; 
.second  segment  opiuiu*;  black  in  front,  with  a  broad  yellow  cros.s-band 
in  the  middle,  opaque  brown  or  black  behind;  third  segment  narrowly 
brown  or  blackish  in  front  and  behind,  el.sewliere  reddish  yellow;  foiirili 
segment  yellow  and  obscurely  brownish ;  fifth  segment  and  hypopygiuni, 
wholly  reddish  yellow,  the  latter  globose  and  with  a  tuft  of  pile  below 
in  front.  Legs  yellow,  including  the  coxie.  Wings  nearly  hyaline,  not 
exceeding  the  abdomen. 

This  description  applies  nearly  to  typical  specimens,  but  there  is 
iiiuch  variation,  how  nuich  of  which  is  varietal  and  how  nuich  specilic 
1  cannot  say.  The  following  are  some  of  the  difterences  I  have  ob- 
served : 

(rt)  (?.  Larger  (10"""),  abdomen  slender,  banded,  nu)re  blackish;  yel- 
low lateral  stripes  of  thorax  entire,  ^ew  England,  AVashington  Terri- 
tory. 

(ft)  i.  Smaller  (0'"™),  abdomen  more  blackish,  coxne  black,  base  of 
femora  blackish. 

(c)  $.  Front  shining  black,  yellow  on  the  sides  below;  yellow  lateral 
stripes  of  thorax  entire.  Abdomen  moderately  broad,  shining  black 
with  three  moderately  arcuate,  slender,  entire  bands,  reaching  the 
lateral  margins;  fifth  segment  with  an  interrupted  band;  coxie  and 
legs  yellow;  face  yellow.    New  England. 

(d)  9.  Face  with  an  elongate,  oval,  shining  black  spot;  lateral  tho- 
racic stripes  abbreviated  at  the  suture;  abdonu'n  slejuler,  black,  with 
three  yellow  bands,  narrowly  <»piH]ue  in  front  and  behind  these;  fifth 

[segment  with  a  yellow  hind  margin.     New  lOnglaiid. 


I  t 

L  ,1  . 


106 


BULLETIN   31,    UNITED    STATES    NATIONAL   MUSEUM. 


\:m 


!i 


Spheerophorla  Bulphurlpes. 

SiirphuH  Hulphiiripet  Tliomson,  Eagenies  Ress,  501. 
Sphwr.iphoria  Hiilpliiiripen  Oston  SucktMi,  VVeHt.  Dipt.,  3U0, 

Habitat. — CiiliCornia ! 

^  .  Lcuytli,  S  to  9""".  Face  atid  front  livid  yellow;  cheeks  brovcj 
beliiiid.  Anteiiii.T  yollow,  third  joint  ln-o\vni.sh  ahovo.  Thorax  olivaJ 
<'eous  black,  hnt  little  iiK'tallic, ;  antesiitnral  lateral  striite.s  broad;  scii| 
tellnni  li{?lit  oehniccons  yellow,  with  lijfht])ile;  i)leuraj  shining  bh.iki 
somewhat  blnisli,  with  light  yellow  spots.  Abdomen  black,  with  tliretj 
yellow  or  orange  bands,  slightly  arcuate,  entire;  in  front  of  and  Uj 
hind  each  yellow  band,  more  broadl,\  on  the  second  segment,  opiKjuJ 
black;  elsewliere  tlie  abdomen  is  sliining,  more  or  less  nu'tallic;  tit'tti 
segment  with  two  red  or  orange  spots:  hypopyginm  yellow  or  red,  iiiorfl 
or  less  blackish  behind.  Legs,  including  the  coxiu,  yellow;  the  tarsi,! 
especially  the  hind  pair,  ochraceous.  Wings  nearly  hyaline ;  a  littltj 
exceeding  the  tip  of  the  abdomen. 

Two  si)ecimens,  Southern  California.  With  these  there  are  others,J 
which  probably  belong  to  the  same  species,  differing  in  the  abdoiniml 
bands  being  broader,  the  color  less  black  and  less  opaque,  and  tk\ 
fourth  and  fifth  seguients  reddish  with  brownish  marks. 

Sphaerophoria  melanoaa,  ii.  Hp. 

Habitat. — California ! 

<?.  Length,  8""".  Front  and  face  light,  livid,  greenish-yellow,  til 
facial  tubercle  fuscous,  and  the  oral  margin  in  front  narrowly  brownish 
Cheeks  metallic  greenish  black  behind;  antennae  reddish-yellow;  tliml 
joint  brown  above.  Dorsum  of  thorax  metallic  greenish-black;  ttij 
ante-sutural  yellow  stripes  not  very  broad;  pleura} deep,  shining  blackl 
somewhat  bluish,  with  light  yellow  spots.  Abdomen  opaque  blact! 
first  segment,  very  narrow  hind  margin  of  the  second,  broader  hind  marl 
gin  of  the  third  au(i  fourth,  and  the  fifth  segment,  except  a  median  s])oJ 
shining  metallic ;  first  segment  with  a  narrow,  narrowly  interruptedi 
yellow  band;  third  with  a  broader  entire  one,  not  reaching  to  the  hiterii 
margins;  fourth  with  two  narrowly  separated  spots  in  front;  fifth  witll 
two  smaller  ones.  Hypopygium  globular,  not  pilose,  red,  black  beliiniii 
CoxjB  black,  the  hind  pair  with  a  yellow  spot  behind;  femora  blackijii 
on  the  basal  half,  distal  portion  and  tibial  yellow  and  luteous;  tiiK| 
brown.  Wings  nearly  hyaline,  slightly  exceeding  the  abdomen  in  leiijitLl 

$  .  Front  deei)ly  shining  black,  narrowly  yellow  on  the  sides  to  ikmI 
the  middle.     Abdomen  moderately  shining,  black;  second,  third,  ai 
fourth  segments  each  with  a  slender,  gently  arcuate,  yellow  cross-hiiiKi 
attaining  the  lateral  margins;  the  first  one  very  nairowly  interrupth^ 
in  the  middle.    Legs,  including  all  the  coxaj,  light  yellow;  the  tiiK 
especially  the  hind  i)air,  ochraceous. 

This  description  is  from  two  Ki)eciniens,  sent  me  by  Mr.  CoquilletJ 
pinned  together  and  bearing  a  label,  "Taken  in  coitu."  The  grciitdl 
ference  in  the  legs  would  have  furnished  good  grounds  for  believiiij:  ii| 
specimens  to  be  specifically  distinct,  had  they  not  been  taken  togi'tlit:|2 


[JM. 


SYNOPSIS    OF    NORTH    AMKRICAN    SYKPHID^E. 


10- 


,1 


eeks  brown  I 
horax  olivaj 
broiul ;  scuJ 
iiiiiif;;  blwil 
:,  with  tlim^ij 
;  of  and  be-l 
lont,  opaqwl 
I'tallic;  til'tti 
or  red,  inonl 
V  J  the  tarsif 
ine ;  a  littltl 


1 -yellow,  tlif| 
?ly  brownish! 
(•ellow;  tliirt 
|li-black;  tlit| 
lining  bladj 
aqiie  black, 
ler  bind  marl 
median  si)o;| 
interruptei! 
to  the  lateral 
[\t;  lifth  wit| 
slack  beliiiicl 
iiora  blackisi 
uteous;  tiir>| 
nen  in  UMijitlt 
sides  to  m\ 
id,  thirtl,  all. 
\v  {n'oss-baiKp 
y  internii)!^^ 
>w;  the  taKi 


With  these  two  spccinn'ns  were  st^veraj  others,  all  males,  ajjreeing 
3losely,excei)t  tiiat  the  iiietallio  eoloi' of  tin;  ahdomen  is  more  extensive. 
?\vo  oHier  males  hav<!  the  spots  on  the  fourlh  segnu'iit  eoaleseent  e.nd 
the  femora  less  black  toward  the  base.  One  male  has  the  lace  distinctly 
)la('kish  on  the  tubercle  and  oral  margin;  the  abdomen  deej)  bhn^k, 
rith  the  three  narrow  cross  bands  all  interrupted;  the  femora  almost 
rliolly  black;  and  tlie  tibiai  and  tarsi  much  darker  than  the  male  iirst 
h'sciibed;  the  hyi)opygium  ;dso  in  hujic  part  black.  Anollier  mah^ 
iilleis  from  the  first  only  in  the  bands  bein;;'  narrower  and  all  interrupt«'d. 
l11  these  ditferences  are  i)robably  only  individnal.  Other  males  re- 
Boniblin;^'  these,  but  with  tlu^  hind  coxai  and  the  legs  wholly  yellow, 
^■'lay  be  specifically  dillerent. 

Spbaeiophoiia  niicrura. 

Siilnrrojihoiin  micnira  Ostfii  Suckcii,  WcMt.  Dipt.,  UliO. 

n<(bitat. — California ! 

(? .  Length,  7.5  to  ()""".  Face  light  yellow,  often  with  a  greenish  tinge, 
pith  a  brown  or  blackish  stripe  not  rea(!hing  the  antennjB ;  cheeks 
ietalli(!  greenish  black  beliind,  frontal  triangle  with  a  large  shield- 
bbaped,  greenish  metallic  or  .shining  black  spot;  the  interval  between 
hie  sjjot  and  the  eyes  is  yellow,  and  yellow  ])ollino.se,  antennae  red  or 
peddish  brown  ;  the  third  joint  bla(;kish  above,  below  red.  Thorax  dark 
letallic  green,  the  yellow  lateral  stripes  only  reaching  the  suture;  scu- 
^ellum  yellow,  with  black  ]»ile;  i)hMira' dark  metallic,  .somewhat  blui.sh 
rithont  light  yellow  spots.  Abdomen  black;  hist  .segment  yellow  O'l 
the  anterior  angles ;  second,  third  and  fcuirth  segments  each  witl'  a 
ptiaight  yellow  cross  band  near  the  middle  and  attaining  the  latrral 

argins,  in  front  and  behind  with  an  opacjue  black  cross  band ;  the 
lind  margins  shining  bluish  black;  that  on  the  .second  segment  i.s  the 
laiTowest  and  sometimes  narrowly  interru]>ted  ;  fifth  segment  with 
fellow  .sides  and  twoy<*llow  streaks  in  tne  iniddle.  Ilypopygium  black, 
|reiy  small.  Legsdark  brown  or  bhu'k  ;  the  »'nds  of  the  four  front  femora 
lore  or  less  brownish-yellow.     Wings  with  a  brownish  tinge. 

Four  si)ecimens,  Southern  California. 

|lphaerophoria  scripta. 

MuH'o  nrripfa  Liiiii(^,  l';iiiiiii  I^ist'c.,  i>.  \SiiK 

('oiinp»  f/nnmnliiM  .Scojioli,  l^ntoni.  Cartiii)!if','i,  9t)."), 

Siirphus  nciipliix  l'\'iliriciiis,  S|M'c.  Ins.,  ii,  HM,  (i'2 ;    id.,  Enf.  Syst.,  iv,  :<0S,,113; 

Moifjeii,  Syst.  IJcsclir.,  ill,  :<'il,  7:'>. 
^ca-vaficriptti  Faliiiciiis,  .Syst.  Aiiti.,  2'>2,  IT. 
Sphwrophnria  nrripla  MiUMiiiarl,  Hist.  Nut.  Dipt.,  i,  ;v>l,  1;  Zotteistcili,  Dipt. 

Scand.,  ii,  7()(>,  I;  AValkcr.  List.  ctn..  iii,  5'J:5. 
MclilhrpptiiK  sryipiiiK  Sclii!icr.  I";nni;i    Aii-^lr..   i.   lUii:  \.  d.   Wiilp, 'rijdsclir.   v. 

iiutoiii,  XX  vi. 

llnhitnt. — Canada  (v.  d.  Wul))),  iMirope. 

i'  Leii'.'th,  10  to  rj""".  Abdomen  of  the  male  extending  beyond  the 
riiifis,  the  first  yellow  band  (contiguous  with  the  lateral  margins.  Yel- 
)\\  bands  distinctly  limited  only  on  the  front  part  of  the  al)domen  :  on 


■i 


V  i! 


/ 


(!     1 

'''  i"l 

'  -I'M' 

m 
'I 


\^s\ 


\\  I 


"  i'w. 


I 


I  1 


it 


J'., 


ti 


'  I 


^ 


, 


ii 


108 


IJUI.LETIN    :il,    UMTKI)    STATKS    NATIONAL    MT'SEUM. 


tho  i)ostori()r  i>iirt  llu'  hlnck  yroimd  color  almost  wholly  obsolete, r 
for  tho  ^'icator  part  chaiijiiMl  into  a  brownish  color,  in  wliicii  varioibi 
tbrmctl  vittnlu'  ami  spots  ai)i>('ar.  Thorax  dark  inotalli(!  sr^tMi,  Mh 
shiniiif;,  with  three,  often  indistinct,  lotifjitiidinal  black  stripes,  mil 
yellow,  entire,  lateral  strijies;  scntelluni  yellow.  Abdominal  bands 
front  and  behind  somewhat  euiarK'iiiate  (ansjferandet),  the  first  iiiiJ 
fonrtli  sometimes  interrni)te<l  by  ji  black  line.  Fa(!e  wliiti.sh  yt'llnij 
with  a  tnother-ofpearl  lustre;  front  yellow;  antenna'  re«ldish-ytHoJ 
at  the  tij)  sometimes  brownish.  Les«  reddish-yellow,  tarsi  somewlJ 
darker;  hind  tibiie  on  the  distal  half  thickly  beset  below  with  slKirj 
bhuikish  bristles.  Winj^s  hyaline,  scarcely  tinjf«'d  with  brownish  \>j 
low. 

9  .  Front  yellow,  the  vertex  black,  extended  as  a  median  stripe  iipin!] 
to  the  antenna'.  Abdoinen  broad  and  wholly  bhuik.  with  f(mr  ycllnJ 
bands,  the  first  usually  inteiiupted,  the  followinfj  ones  emarfriiia't| 
behind,  the  fourth  broadly  intei iui)ted. — Schiner,  1.  c,  translation, 

The  species  is  a  veiy  variabb'  one.  and  very  common  throughout  EtJ 
roi)e.  I  jjive  it  en  the  authority  of  Mr.  v.  d.  Wiilp.  1  have  not  itlciitJ 
tied  it  with  any  certainty  mys<'lf,  the  s))ecimens  designated  by  a  umlj 
S.  cj/liiHln'cd  approaching  it  most  closely,  but  differing  in  the  abdn 
nal  bands  being  neither  emarginatc  iu»r  interrupted. 

Sph3eroplioi'ia  dubia. 

Sjiliwrojiliorld  (Inliiu  Uinor,  Ann.  Hoc.  I'".nt.  Kr.,  l^-'-t,  KH. 

Hahitat. — Calilornia. 

J.  Long.  7""".  Antennis  testaceis,  ajiice  infuscatis,  fronte  et  I'm 
pallidissime  llavis  ;  thorace  nigro,  ])aruui  ivnesccnte;  caly|)tris  cr  !i 
teribus  testaceis;  abdomiue  fulvo,  basi  late,  \ittis  tribus  transviiM' 
latis,  liueu  segmenti  (juinti  intermedia,  bre\i,  nuu.'ulis  duo,  utriii(|i 
lunulatis,  opjjositis,  sexti  ma(!ulis  simillimis,  nigris;  ]»edibus  ll;i\ 
tarsis  tlavo  oV)S(Miro  tinctis. 

AntcMines  d'un  faiive  i)ale,  bords  superifurs  ct  cliete,  bruiis;  I'iUTt 
front  entierement  d'un  blanc  Jaunatre;  thoi'ax  d'un  noir  un  i)eu  bnnizi:^ 
cnillerons  et  balanciers  testaccs;  abdouu'U  fauveavecla  base  largciiif:.p 
noiie,  itu'isions  des  2"  et  3'"  segments,  bonis  du  -t'',  converts  jtar  troJ 
larges  baiules  (ransversales,  noires,  T)"  avec  une  !>ande  dorsale  et  (Icni 
nmcuies  en  forme  de  croissant,  opposdes  parleurs  j>ointes,  (»"  avec  dm 
macules  semblables,  le  tout  de  coideur  noire ;  ])ieds  d'un  jaunt?  assfl 
pale,  tarses  d'un  brun  clair,  un  pen  roussatre.  Ailes  ne  dcpassant  pal 
Tabdomen ;  face  saillante,  obtuse,  calleuse;  antennes,  .'V=  segment  presqii| 
orbiculaire.    I  sijccim. — IMgot,  1.  c. 

Sphaerophoria  pyrrliiiia. 

Sjiliiiroiilioria  fijirrhino  l!i<;()t,  Ann.  Soc.  luir.  Kr.,  l^-dt,  101. 

Habitat. — Califoinia.. 

c^.  Long.  ti""".  Antennis  fulvis,  apice  fuscis;  facie  Hava,  callositai 
fulva ;  thorace leuescente;  calyptris  feiealbis, halteribus  llavis;  abdoiniil 


JM. 


SYNOPSIS   or    NORTH    AMERICAN    SYRPIIID/E 


109 


l»l)SOl('tc,i 

li  viiridiisl 
rcoii,  rrclilj 
■triiM's,  aiij 
il  bands ; 
le  first  ill* 
i.sli  yt'lM 
lish-.V('ll(nl 
i  soMii'whJ 
with  sliorj 
^ownislive 

tripo  lu'iiif 
four  yelldi 

emavgiii,! 
slntioii 
jughout  EtI 
(i  not  iilciitl 

by  (I  \um 
the  abduiu 


lite  ft  hi: 

)tris  ct  liii 

rvaiisvi'M 

(»,  nt!'ini|i 

ibiis   tl;u 

iiiKs;  luccrt 

K'll  1  in  Ill/I-: 

iir  hiruciiii''' 
s  i)ar  tn 
ale  et  (Icr:; 
'  av('<'  tl''ii' 
jauiie  assi 
)assaiit  pii 
eiit  piosiii; 


Ifiilvo,  .sc^'iiu'iito  1"  iiij;i<),  linea  intermedia  \  ittistine  traiusversis  tribus, 
Itertiriiiiterriipta,  iua(;iiHsst'<;ni(Uit()ruiiHjuartiset(iiiiiitis,ulriii(|iie,iiif;ri.s; 
IiicdiiMis  pallide,  testa«!eis,  tibiis  i)(»stic(iriini  basi,  taisisijue  tolls,  pulli(l6 

lliilis. 

Aiili'iines  laiives,  i'Xtremite  <hi  '.'>''  se-fuient  ct  idiete,  iioiratres;  face 
Ll'iiii  j;niii('  hlaiu'.iiatr<',  iiK'tliaiis  (I'liii  i'aiive  biisant ;  front  jaiuie:  tliorax 
lliroii/e;  abdoiniMi  d'an  fauve  i'on;;t'atre,  1""  sej;rni'nt  noir,  une  lif^iie 
liiinliani'  interroniime.  idar^ie  vers  les  incisions,  an  (>''  sejiinent,  tiois 
llarfit's  bandes  transversales  sitnees  snr  lesdites  incisions,  la  3"  donble- 
linent  interronipue,  deux  jioints  arrondis,  d(^  (duKpie  cote,  sur  le  5%  et 
Luatre  macules  irreguliere.s  sur  le  G''  segment,  noirs ;  cuillerons  blan- 
K-Iii'itrcs,  lialanciers  jannes.  Ailes  ne  dcpassant  i)as  Tabdonien  ;  face  sail- 
llinitc,  obtuse,  calleuse ;  antennes,  8"  segment  orbiculaire.  1  speciiu. — 
jlJigot,  I.  c. 

|8phaerophoria  infumata. 

Sp-pliiin  iii/iiiiiatiin  Tlioiii.soii,  P^iii^ciiios  Ro.sa,  501. 

llahitaf. — California  (Thomson). 

JDneo-niger,  epistomate,  pectoris  niaculis  lineaque  frontali  utrinque 
Ijilbido  iiiargaritaceis,  antennis,  vitta  laterali  abbn^viata  thoracis,  sou- 
jteilo.  i>edibus  fasciiscpie  abdominis  llavis,  alls  leviter  infunmtis.  c?  9- 
[Long.  ;■)-()'"'". 

I'ra'cedenti  [6'.  ,suli)lturi]H'.s]  simillimus  sed  parnm  feneo-nn(!ans,  an- 
tennis  articulo  .'{"  ovali-rotundato,  linea  media  im])ressa  frontali  obso- 
li'ta,;L;nIa  ameo-fusca,  alis  leviter  infumatis,  abdomine  faseia  1"  Integra, 
coxis  antcrioribus  nigricantibus,  apice  tlavis  distiiictus. 

Mas  dill'ert  coxis  omnibus  fusco-nigiis,  npicu'  pallidis,  abdomine  seg- 
^Mentis  4-0  rubris,  signaturis  fusco  auieis  vix  ullis. — Thom.son,  1.  c. 

ADDITIONAL  NORTH  AMERICAN  .Sl'ECIES. 

pli^rophoria  fulvicauda  Hij^ot,  Ami.  Soc.  I^iit.  Fr.,  l-'-'4, 101. — Mexico. 
Sphasrophoria  nasuta  lii^'ot,  Aim.  Soc  Kiit.  Fr.,  18c<4,  lO;?. — Moxico. 
Bphseioplioria  pachypyga  bi<;;<)t,  Ann.  Soc,  Enl.  Fr.,  18-^4, 104. — Mi'xico. 
Sphaerophoria  picta  Macinuirt,  lli.si.  Naf.  Diiit.,  i , .").');5, s ;  Zotterstedt,  Dipt.  Scand., 
ii.  T7-J:  viii.  I'lHI,";  Holnif^riMi,  Imh.  Nonlf^rotMil.,  100. — Greenland. 
Siirpliiiti  /licliin  Mciircn,  SyHt.  Bcschr.,  iii,  :{'i(),  77. 
Mclillireptii-i  ])i(lii.i  Schincr,  Fauna  Aastriaca,  i,H17. 
Sphaerophoria  picticauda  15i;;ot,  Ann.  S<i( .  Knt.  Fr.,  1884, 102.— Mexico. 
Sphaerophoria  strigata  Stii;rcr,  Grocnl.  Antl.,  :«W,  :?1;  Hohnii;ren,  Ins.  Nordgroenl., 
li'O.— Gn'.'nland. 
Sphwrojihoria  hicroijliijiliica  Mcii;t^n,  Syst.  Bcsclir..  iii,:W7,  78. 
Spharophoria  metitha»tri  Linn<^,  Mcif^cii,  Syst,  Bosclir.,  iii,:$"2.'), 75. 

Walker,  List,  etc.,  iii,  593,  mentions  these  European  sj)ecies  as  oc- 
|carring  in  Nova  Scotia,  but  his  statement  is  of  littlo  value  without  con- 
irmation. 


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110  BULLETIN    31,    UNITED   STATES    NATIONAL    MUSEUM. 


PELECOCERA/ 

Pehrocera  Mdijjfii,  S\Ht,  Ht'sdir.,  iii,  WW,  IH-iti. 

Kuoerntomijui  Willistoii  (iioii  l!i;;otj,  Wiciirr  Kiitoiii.  Zoit.,  iii,  185,  1884. 

Small,  iieiirly  bare,  blai^k  sin'oics,  tin'  Ni<l«'.s  of  the  face,  and  the  iibdrJ 
men,  with  yellowish  marl<in<^s.  Head  broader  than  the  thorax ;  t'inn;! 
of  the  male  very  broad,  not  narrowe<l  above.  Kyes  bare.  Face  Itnrcf 
lijthtly  <!oneave  above,  moderately  produced  <lownward,  and  witli  ji 
lar^e  (!onvex  fjibbosity  below.  Antenna^  larfje,  first  two  joints  vcryl 
short,  third  Joint  very  mueh  elon^'ated,  e,omj)resst'd,  stron<,dy  diliitpJ 
below  at  the  base,  the  terminal  portion  slender,  eylindri(!;d,  endin},niial 
short,  thickened,  two-Jointed,  pubescent  style.  Abdomen  of  nciiiivj 
equal  width,  depressed,  about  as  broad  as  the  thorax;  hyj»opvj;ii 
small.  l''eet  simple,  the  renn)ra  not  thickened.  Marfjinal  cell  of  win^rij 
open,  third  longitudinal  vein  gently  <u)nv«'X  in  front ;  anterior  ckks 
vein  near  base  of  discal  cell,  rectangular.  Type  of  genus  P.  irinnc\i\ 
Meigen,  Europe. 

This  definition  is  drawn  froni  specimens  of  P.  Pergandei,  but  it  onlvj 
requirCvH  slight  modifications  to  adapt  it  to  the  four  other  known,  Kiiiol 
pean  species,  specimens  of  two  of  which  (/*.  lati/rouN  Loew  and  P.  .smj 
voides  Fall.)  I  have  compared,  through  llie  kindness  of  Prof\'ssor  Mik, 
111  P.  latifronH  the  structure  of  the  antennic  is  very  nesirly  like  what  it| 
appears  to  be  in  the  female  of  P.  Pctgitndf'i,  cxce])!  that  the  style  is  imid 
more  slender ;  the  face  is  also  more  protuberant  below.     P.  ncncrouittX 
dillers  distinctly  in  the  thiidjointof  f  he  antenn.T  being  moreoval,  iiiidi 
thestylebeingmore  slenderand  dorsal,  not  terniiuid.    7^  Vergnndei \s{\\[\A 
nearest  iillied  to  P.  latifronti  of  any  of  the  desciibed  species,  and  Ciiiiiii);| 
be  sei)arated.     The  genus  I  lirst  described  iis  IJuveratomyia,  overlookiii;' 
Pelecocera,  and  it  was  not  till  I  casually  lead  the  description  of  L.iew'j 
8i)ecies  that  I  recognized  the  relationship  of  my  specimen.    Mr.  Big(Jt■^| 
determination  of  the  species,  from  my  des(n'iptions,  as  a  member  ottbej 
genus  Mcrapioidcn  is  of  course  wholly  inadmissible. 

Pelecocera  Pergandei.    (Plate  IV,  lij;.  l:i.) 

Enceruiomtjin  Ptryaiidei  Wiilintoii,  Wifti.  Ent.  ZiMl.,  iii,  p.  186,  fig. 
MerainoiAex  Vvrgamlei  Hi;;nt,  Wlfii.  Ent.  Zeit.,  iii,  '-217. 
Pelecocera  Pergandei  Willistoii,  Bull.  Urooklyii  Ent.  Soc,  vii,  139. 

Habitat. — District  of  Columbia! 

S.  Length,  7™™.    Head  black;  face  yellow,  with  a  broad   median | 
stripe,  narrowed  somewhat  above,  and  the  cheeks,  °hiniug  black ;  an- 
tenn£B  reddish  yellow,  the  upper  border  and  the  tip  of  the  third  joint  I 
and  the  style  blackish.    Front  shiinng  black,  very  broad ,  lightly  grooved 
across  the  middle.    Thorax  shining  greenish  black,  on  the  humeri  it  | 
spot  of  whitish  dust,  extending  back  nearly  to  the  root  of  the  wings, 
Abelomen  scarcely  broader  than  the  thorax,  a  little  broader  at  the  tip  | 

*ntAeK5(,  an  axe;  «tpuf,  horn. 


SYNOPSIS    OF    NORTI!    AMERICAN    SYUIMIID^. 


Ill 


of  the  tliiid  st't'iiH'iit  ;  Ithuk,  «'X(U'|>t  the  (ll'tli  s('<,'iiKint  and  flic  liypo- 
pyffiuiii,  Imt  slijjlitly  sliiiiiii^';  mccoimI  sc^'iiioiit  iicross  the  luiddlt^  with  two 
coah'scent  transvi'isc  spots;  the  Ihiid  and  fourth  scffnieiits  on  the  basal 
half  reddish  or  l)r(»\vnisli  yt>llow.  Coxu'  and  \vftn  yeUow,  the  four  front 
femora  and  tibial  in  tlu'  niiddh'  yellowisli  brown,  the  hind  h>t,'s,  with 
the  exception  of  tlie  base  and  extreme  tip  of  the  femora,  bhielv.  Pilo 
of  the  wiiole  body  short,  soft,  and  spaisc.  ^Vin^^s  hyaline,  the  outer 
part  cinereous;  stiyma  brownish  yellowisli. 

One  specimen,  District  of  Co!iiml)ia  (Theo.  Pergande). 

A  female  discoviTt'd  with  the  last,  wliicii  1  have  since  examined,  lias 
the  second  abdominal  st'<>iiii'nt  with  a  broad  median  band,  the  tliird  sej>- 
nu'iit,  ex<  <'i>t  the  narrow  hind  niarj^in,  and  the  anterior  two-thirds  of  the 
(ointli  segment,  all  i)ure  yellowisli  red.  The  abdonu'U  is  of  nearly  equal 
width  tliroiijihont,  sijarcely  at  all  wider  tiian  the  tlioiax.  The  third  joint 
of  the  anfeiiiiiu  does  not  appear  to  be  produced  into  a  cylindrical  pro- 
cess, but  the  pi'ojection,  which  is  as  long  as  in  the  male,  seems  to  bo 
wholly  composed  of  the  style. 


"I    ;l 

If 


NEOASCIA,  NOM.  NOV.* 

Ascia  Moigeii  (iioii  Sc'oiioli),  Sywt.  J'.isclir.,  iii,  IH,"),  1822. 

Small,  slender,  nearly  bare  species,  black  or  nu-tallic  green,  with  or 
without  reddish  or  yellow  on  the  abdomen.  Antennre  shorter  than  the 
head;  third  joint  oval  or  obtusely  pointed;  arista  near  the  middle  of 
the  Joint,  bare.  Face  black,  even,  without  tubercle,  conically  i)rodueed 
downward  and  forward,  so  that  the  profde  is  gently  and  evenly  con- 
cave from  base  of  antenna}  to  oral  margin.  ICves  bare,  separated  by 
the  front,  which  is  rather  broad  in  the  female,  narrower  in  the  male. 
Abdomen  about  twice  as  long  as  the  thorax;  second  segment  narrow, 
widened  ]tosteriorly ;  third  and  fourth  broad  and  arched;  in  outline 
short  club  shaped.  Front  and  middle  legs  slender,  hind  femora  very 
much  thickened  and  with  a  row  of  short  s[tines  below;  hind  tibite  bent. 
Marginal  cell  of  wings  o])en ;  anterior  cross-vein  before  the  middle  of  the 
discal  cell;  the  last  section  of  the  fourth  vein  joins  the  third  in  a  right 
aiij;le,  the  anterior  angle  of  discal  cell  also  a  right  angle;  third  longi- 
tudinal vein  straight. 

Neoascia  globosa.     (Plato  IV,  figs.  10,  lOo.) 
Asciu  (jtoboaa  Walker,  List,  etc.,  iii,  546. 
Ascia  metalUva  Williston,  Proc.  Am.  Phil.  Soc,  xx,  315. 
Ascia  iiasiita  Bigot,  Annates  Soc.  Ent.  de  France,  1883,  327. 
Ascia  qiiudrinotala  Bigot,  ibid. 
Ascia  ulbipes  Bigot,  ibid.,  p.  328. 

Habitat. — New  England,  Oregon! 

9.  Length,  3^  to  5™".  Front  bronze  black,  shining,  delicately- 
roughened.    Face  with  a  bluish  reflection,  lightly  covered  with  whitish 

*N^of,  now  ;  ascia,  a  mason's  trowel. 


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l>()lU'ii.  AiitciiiiiL'  bliickisli,  tliii'd  joint  on  \hv  lower  juiit  red.  Tliorail 
motnllir  giiM-nish  hrun/A',  niodfiatcly  .sliinin^',  li^^litl.v  ronaiu-ned.  Abdi  f 
men  li;,'litl.v  ]>un(;tnl;ite,  wlioUy  black,  modi'iatoly  sliinin^.  1a'<4>  vcllowj 
front  and  middle  leniora  black,  oxcei)t  l)aise  andtip,  tlu'  hind  IciiioiJ 
except  the  l»a,se;  hind  tibiiu  with  a  rin^'  beyond  the  niiihlle  blackisL: 
and  iirst  and  last  Joints  of  hind  tarsi  black.  Winy;s  nearly  hvaliiiij 
sti;;ina  dihitely  yellow. 

A  sin;;lc  female  specimen  irom  Connecticut  a^^rees  with  Walker's di] 
scription,  and  may  tIn'refore  be  considered  ty]»ical.     The  si)ecies,  liow 
over,  either  varies  remarkably  in  its  abdomen  and  ley.s,  or  tliere  arc  J 
iiund)er  of  closely  allied  species;  bein^'  unable  to  decide  this  from  tlit| 
material  1  have,  1  will  describe  the  difterent  varieties. 

First  var.,  albipes  Bigot,  5  ,  ?  .    Abdomen  with  two  complete  rcddisLl 
yellow  bunds,  front  and  middle  lejj;s  wholly  yellow;  in  the  male  theliim; 
tibi;c  chiedy  black,  bands  sometin»es  interrupted,  fourth  segment  an(l| 
Lyi)opygiun»  bronze  metallic.     Seven  si)ecimens,  Connecticut. 

Second  var.,  9.     Legs  as  in  p''"ceding,  abdomen  wholly  black.     Twui 
specimens,  ( 'onne(ttieut. 

Third   var.,  S.     Abdomen    with    two   interrupted    bands,   front   audi 
middle  femora  and  tibijc  with  a  black  ling.    Two  specimens,  Connecticiitj 

I'ourtli  var.,  metaUicn,  9.     Abdomen  wholly  black,  or  third  segiiiei 
Avith  two  sn);>.!l  spots.    Legs  black,  base  and  tip  of  tibia-  and  tarsi  yellow.] 
tarsi  otherwise  brownish.     Two  si)ecimens,  Oregon. 

One  male  from  the  last  i)lace  has  the  base  and  ti])sol'  femora  and  taisi| 
moi'e  broadly  yellow,  and  the  abdomen  with  two  bands  (var.  7i(i)iii1(t ']. 
ill  these  last  three  s|)ecimens  the  third  Joint  of  the  anteume  seems  tul 
be  shorter  and  more  rounded  at  the  extremity  than  in  the  Eastern  s[)OL'i 
jiiens.  Possibly  they  may  be  entitled  to  specillc  rank,  but  1  stioiijihl 
suspect  that  all  these  diflerences  are  but  varietiesof  one  widely  distiibj 
uted  species. 

The  si)ecies  described  by  Bigot  as  nasutu  has  a  broad  baud  on  tLcl 
second  anil  third  segments,  thelatter  one  sometimesdivided  in  the  middle, [ 
The  legs  are  yellow,  the  femora  black  towards  the  base  (the  hind  pair, 
except  the  tip),  the  tibia;  with  a   broad  ring  of  the  same  color,  the 
front  tarsi  with  the  first  aiul  last  joint,  the  middle  pair  with  the  last 
joiut,  and  the  hind  pair  with  the  under  side  of  all  the  joints  largely,  black,  | 
The  sjtecimens  were, from  Mt.  Hood.    A ,  quadrinotata,  from  the  same  place, 
ditferschietly  in  there  beingfoursi)otsontheabilomen,an<l  wassusi)ectfcd| 
by  its  author  of  being  a  variety  of  the  ])receding.     Should  the  (liU'oi 
ences  in  the  aMtennai(as  above  stated)  indicate  a  diflerent  species,  it  I 
would  be  entitled  to  the  name  mcf<tUka,oi  which  Bigot's  names  would  | 
indicate  varieties. 

Neoascia  distincta,  n.  s]i. 

Habitat. — Massachusetts  ! 

9.  Leiigth,  4"'"'.    Dee])  metallic  green,  shiniug.     Front  finely  rough  I 
eued;   face  whitish  pollinose.     Antennie  red,  brownish  on  the  upper] 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHID.^. 


113 


border.  Abdomen  only  a  little  narrowed  toward  tlie  base.  Legs  yel- 
low ;  front  and  middle  femora  toward  the  base,  and  a  riuj;  on  hind 
tibi.x,  blackish ;  hind  femora,  except  the  base,  black.  Wings  nearly 
hyaline;  stigma  pale  yellow;  a  minute  stump  of  a  vein  on  the  outer 
(loss- veins. 

Two  specimens,  Beverly,  Massachusetts,  May  iS  (E.  Burgess,  National 
Museum,  Professor  Biley's  (H)llectioi').  This  pretty  species  ig  very  dis- 
tinct from  K.  globosa,  in  the  larger,  moie  elongate  antenna},  in  the  less 
l)ro(luced  epistoma,  in  the  less  spatulate,  broader  at  the  base,  and  more 
pointed  abdomen,  and  in  the  nearly  uniform  bright  metallic  color. 


SPIIEGINA. 

Sphegina  "SMfien,  Syst.  Bnsclii-.,  iii,  1'.):!,  1^-J"J. 

Small,  nearly  bare,  slender  species,  black,  brown,  or  yellow,  more  or 
less  shining.  Antenna  short,  third  joint  rounded,  the  arista  bare,  basal. 
Face  deeply  coiu',ave  in  prolllr  below  the  anteniue,  the  ei)istoma  jxtr- 
rected,  not  descending  below  the  eyes.  Eyes  bare,  sepai-ate  in  the 
male;  front  of  ecpial  width,  broacU'r  in  the  female.  Abdomen  twice  or 
thrice  as  long  as  tiie  thorax;  at  the  base  in  the  male  pedicellate — in  the 
feiiiiile  much  contracted,  but  not  so  slemler;  third  and  fourth  segments 
expanded,  especially  in  the  female,  and  convex  above.  Legs  slender; 
hind  femora  nuu^h  thickened,  with  short  spines  below;  hijul  metatarsi 
tliickenetl.  AVings  long  and  broad;  marginal  cell  <»pen,  third  vein 
striiiglit,  anteriin-  outer  angle  of  first  posterior  cell  rectangular  or  acute; 
{interior  cross-vein  before  the  middle  of  discal  cell.  Type  of  genus,  8. 
clunipefi  Fallen,  Europe. 

TAHLE  OF  SPECIES. 

1.  WiiifijH  large ;  alxlomeii  short ;  i'roiii  in  female  nearly  as  broad  as  long,   infuscata 

Front  in  female  nuich  longer  tha?i  hroail 2 

2.  Fifth  abdoniiDul  wegmeut  in  female  considerably  broader  than  long     .     .    lobata 

Fiftli  segment  in  female  bnt  little  broader  than  long 3 

3.  Thorax  niorr  or  less  black riifiventris 

Thorax  not  at  all  black  (  9  ) Keeniana 

Spheeiua  Keeniana,  n.  sp.  (Plate  IV,  tig.  11.) 

!I(d)itat. — Pennsylvania ! 

9.  Length,  5  to  (>""".  Front  black,  thickly  (lusted  on  the  sides,  leav- 
ing a  slender,  shining  strij)e,  interrupted  in  the  middle.  Antennte  yel- 
low, third  joint  rather  large,  orbicular.  Face  light  yellow,  blackish  iu 
the  middle  above;  cheeks  an<l  oiiciput  black,  lightly  dusted.  Thorax 
yellow;  the  dorsum  and  scutellum  darker,  with  are(l<lish  cast;  the  lower 
part  of  the  ])leune  behind,  brown.  Abdomen  yellow,  broad  behind; 
first  segment  behind,  obscure  spots  on  the  sides  of  the  second  segment 
in  I'ront,  and  small  spots  on  the  posterior  angles  of  tiie  fourth  and  fifth 
segments,  blackish  ;  second  and  third  segments  on  the  posterior  part 
with  a  rather   narrow,  black  cross-band;    lifth   segment    moderately 


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114  BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 

broader  than  long.  Coxa?  aiul  legs  white;  a  broad  preapical  ring  on 
the  hind  femora,  hind  metatarsi,  and  the  last  two  joints  of  all  the  tarsi, 
i  lack;  two  small,  incomplete  rings  on  the  hind  tibice,  blackish.  Wings 
hyaline. 

g.  Thorax  blackish  above,  sometimes  wholly  black  except  the  hnmeri 
and  below  them.  Abdomen  of  moderate  length,  sometimes  nearly  black, 
except  the.  basal  part  of  the  third  segment,  the  fourth  segment  always 
more  brown  than  in  thefenmle  ;  front  and  middle  tibia?  sometimes  faintly 
brownish  near  their  middle. 

This  species  differs  from  lohata,  to  which  it  is  most  nearly  allied,  be 
sides  the  coloration,  in  the  anterior  distal  angle  of  the  first  lujsterior 
cell  being  more  acute,  and  the  abdomen  of  the  male  being  very  much 
less  slender.  Four  female  nnd  three  male  specimens,  captured  by  Mr. 
Eugene  L.  Keen,  in  Fairmount  Park,  Philadelphia,  May  21.  The 
black  markings,  in  both  male  and  lemale,  vary  much  in  intensity  on  the 
abdomen. 

Sphei^na  iiifuscata.     (Pluto  IV  ;  fig.  12.) 

SplnyiiKt  infuncata  Loew,  Cfiitiir.,  iii,  23. 

Hahitat. — Sitka  (Loew),  Oregon! 

S  ,9  .  Length, .")  to  0:^""",  of  wings  6J  to  G|""".  Head  black,  opaque; 
IVont  of  male:  narrower  than  that  of  female,  and  clothed  with  longer, 
bliick  pile,  Antennse  black.  Thorax  fuscous  bUick ;  the  dorsum  with 
d;'licate  pile,  longer  and  more  obscure  in  the  male  than  in  the  female. 
Scutelluui  and  metanotum  of  the  same  color  as  the  thorax.  Abdomciii 
shorter  than  in  the  species  indigenous  to  Europe,  and  attenuate  near 
the  base,  in  the  luale  fuscous,  in  the  feuiale  reddish  testaceous  Leti's 
of  the  male  fuscous,  of  the  female  reddish  testaceous.  AVings  larue. 
(lilut<^ly  inl'uscate;  stigma  elongate,  fuscous,  apical  angle  of  lirst  poste- 
rior cell  acute. — Translation  from  Loew,  coiupared  with  the  tyi)es. 

A  single  specimen  from  Mount  Hood,  Oregon,  probably  belongs  to 
this  sjjccies,  most  especially  characterized  by  the  short  abdomen,  the 
liu'ge  wings,  and  acute  jiosteriorcell.  The  specimen,  a  fennile,  however, 
has  the  abdomen  and  legs  wholly  light-yellow,  and  thorax  more  brown 
tiian  black;  it  may  be  teneral. 

Sphegina  lufiveutris. 

Sphfyina  riifirciitriK  Loew,  Ct'iitur.,  iii,  2'i. 

Habitat. — New  York  (Lw.),  Wasliington  Territory! 

9.  Length,  (J.j""".  A  very  variable  species.  Ifed.  Dorsum  of  thorax, 
ex('ei)t  the  humeri  and  posterior  angles,  always  black,  .sometimes  the 
rlioi'ax  almost  wholly  black.  Front  black,  oi'  e(|UJil  wi<lth.  Face  .yel- 
lowish, above  somewhat  blackish.  Occiput  black.  Third  Joint  of  the 
anteniiic  fuscous  or  black.  Scutellum  sometimes  red,  olten  pii^eous. 
rarely  black.  Abdomen  red,  shining;  base  often  black,  distal  halt  less 
broad  than  in  8.  lobata.    Front  and  middle  legs  yellowish,  last  two  joints 


SYNOPSIS    OF   NORTH   AMERICAN   SYRPHID^. 


115 


thorax, 
[lies  the 
(iice  yoh 
It  of  tlio 
hiceotis. 
[laH  h%s 

[o  joints 


of  the  tarsi  black;  posterior  logs  brownish-red,  femora  and  tibiae  yel- 
low at  the  base,  tip  of  tibiae  and  tarsi  fuscous-black,  tho  intermediate 
tarsal  joints  often  less  deeply  so.  Wings  subhyalirie,  or  subfuscous  to- 
wards the  tip ;  apical  angle  of  first  posterior  cell  rectangular. 

From  IS.  Johata  this  s])ecies  ditters,  besides  the  color  of  the  body,  in 
the  hist  segment  of  the  abdomen  being  less  broad,  and  the  hind  femora 
less  incrassate. — Translation  from  Loew,  coniparcd  with  the  type. 

A  single  female  specimen  from  Washington  Territory  agi'ees  per- 
fectly with  this  description,  except  that  I  do  not  see  that  the  hind  fe- 
mora are  less  in(;rassato  than  in  N.  hhata.  The  third  joint  of  the  an- 
tenna', the  thorax  wholly,  and  the  base  of  the  abdomen  are  black. 

Sphe^ina  lobata. 

SpUtijinn  lobata  Loew,  Ceiitur.,  iii,  ^1. 

n<thiti(t. — White  Mountains,  New  Hampshire,  Oregon!,  ^Middle  States 
(Lw.) 

Length,  Oi""".  Male.  Head  black.  Face  nearly  wliolly  white.  Eyes 
separate;  front  of  equal  width;  antennae  luteous,  arista  sub-fnscous. 
Thorax  shining  black;  humeri  and  lateral  si»ots  of  the  dorsum  testa- 
ceous. Scutellum  and  abdomen  black,  sliining;  basal  fascia  of  the 
tiiinl  abdominal  segment  yellow ;  anterior  angles  and  ])osterior  mar- 
i:in  of  the  fourth  segment  testaceous.  Hypopygium  globose,  black, 
Left  angle  of  the  last  ventral  segment  jiroduced  into  a  large  fuscous 
lestaceous  lobe.  C'oxa'  and  feet,  whitish  ;  distal  half  of  the  hind  femora, 
except  the  extreme  tip,  black;  basal  half  of  hind  tibia'  fuscous;  distal 
portion  imperfectly  black  annulate.  Last  two  joints  of  the  front,  and 
the  first  and  last  two  of  the  hind  tarsi,  black  — the  intermediate  ones  sub- 
liiseous.  Wings  subfuscous,  stigma  a  little  more  obscure;  apical  angle 
of  the  tirst  posterior  cell  a  right  one. 

Female.  \"ery  similar  to  the  male.  Front  a  little  broader.  Distal 
li.ilf  of  abdomen  strongly  dilated,  the  third  and  fourth  segments  with 
two  spots,  large,  testaceous,  subobsolete  ;  fifth  segment  sordid  white. 
I-ast  two  joints  of  the  four  front  tarsi  blackish  ;  hind  tarsi  black,  inter- 
iiiediale  joints  a  little  less  so. — Translation. 

Three  s))ecimens  from  Mount  Washington,  >.«'\v  Hampshire  (Dr. 
(ieorge  l)imnu>ck,*Nos.  14!M-7-<S),  and  one  male  from  Mount  Hood, 
Oregon,  1  have  no  doubt  belong  with  this  sjK'cies,  which  is  evidently 
viiriahle.  F'or  this  reason  1  have  chosen  rather  to  rei)roduce  the  origi- 
nal in  translation  and  ]>oint  out  the  differences.  The  female  agrees 
tlironglumt,  except  that  the  humeri  and  interrupted  bands  of  the  abdo- 
I  iiiei!  are  light  yellow.  The  third  joint  of  the  antenna'  in  the  nuiles  is 
more  blackish  than  luteous,  Iheface  is  blackish  on  the  iii)per  part;  the 
reddish  color  of  the  humeri  and  ])ostalar  callus  not  very  apj)arent  in  all 
but  one  spcu-imen.  In  the  Eastern  males  the  distal  half  of  the  second 
sefi'ineut  of  the  abdomen  (in  one  specimen  the  third  wholly  and  the  fourth 
except  a  darker  band  in  the  middle)  is  red,  the  hyi)oi)ygiuin  more  black- 


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116 


BULLETIN   31,    UNITED    STATES    NATIONAL    MUSEUM. 


ish ;  ill  the  Western  specimen  the  abdomen  is  more  nearly  as  Loew  de- 
scribed it.     Ill  all  the  male  specimens  the  hind  femora  are  brownish  red, 
not  black. 
Type  specimen  in  the  Loew  collection  at  Cambridge  examined. 


BACCHA.* 

liaccha  Fabricius,  Syst.  Autl.,  UH>,  1.-^05. 
Ocjiptamii.i  Macqiiart,  Hist.  Nat.  Dipt.,  i,  o.jO,  1834. 
Bnchit  Scliiner,  ct  auct. 

Medium  size,  bare  species,  usually  with  long,  slender  abdomen,  nar- 
rowest towards  the  base,  but  often  shorter  and  not  narrowed  at  base. 
Head  large  aii<l  round,  broader  than  the  thorax.  Anteiuiie  short,  third 
joint  rounded  or  oval ;  arista  toward  the  base,  slender,  bare.  Eyes  bare, 
contiguous  in  the  male.  Front  in  female  long,  narrow,  often  mucli  nar- 
rowed above.  Face  in  large  part  yellowish,  nearly  straight  in  protile 
below  the  antenna',  or  only  gently  excavated  above  the  tubercle ;  below 
the  tubercle  usually  more  or  less  receding;  not  at  all  juoduced  below 
the  eyes.  Cheeks  very  narrow,  the  distance  between  the  eyes  below  less 
than  the  width  of  the  face  in  the  middle.  Thorax  short,  abxlomen  three 
or  four  times  as  long  as  the  thorax,  the  second  segment  very  slender, 
thence  gradually  widening  to  tij)  of  fourth  segment,  the  remaining  seg 
ments  gradually  or  abruptl.y  narrowed.  Legs  verv  slender,  the  hind 
femora  elongate,  but  not  thickened,  hind  metjitarsi  elongated  and  thi(;k- 
ened.  Wings  as  in  Syrphus,  the  small  cross-vein  sometimes  near  the 
middle  of  discal  cell ;  olteii  with  dark  brown  or  blackish  markings. 
Type  of  genus,  B.  elonaata  Fabr.,  Europe. 

TABLE  OF  SPECIES. 

1. — Abdomen   ili«tinctl.v  narrowed  toward  tbo    ba.so ;    elongate,  more  or  less  chilj- 

sbainid  or  sjiatnlate 2 

Abdoiufu  shorter  than  the  wiug.s;  either  broadest  toward  the  base,  or  with  par- 
allel sides ;  not  cylindrical  or  clubbed  (Oci/j)/a»i«8) 8 

2. — Third  joint  of  the  antennte  elongate  oval,  obtusely  pointed;  face  very  prom- 
inent     Babista 

Third  joint  short  oval,  obtusely  rounded;  face  not  prominent 3 

3. — Wings  cinerous  hyaline,  without  distinct  dark  markings;    abdomen  very  slin- 

(Uir coguata,  obscuricornis 

Wings  more  or  less  browni?h  or  blackish 4 

4. — Wings  with  a  broad  median  cross-band,  reacliing  to  the  fourth  posterior  cell    5 
Wings  with  the  front  border,  at  least,  for  its  whole  length  brownish  or  bla<  k- 

ish 6 

5. — Scutellum  and  posterior  part  of  the  dorsum  shining  golden    ....     aurluota 
Scutellum  translucent,  yellowish  brown,  with  a  metallic  reflection     .     .    lemur 

6. — Posterior  half  of  the  wings  nearly  hyaline TarchetiuB 

Wings  more  or  less  brown  or  blackish  on  the  posterior  part 7 


*  Baccha,  a  mythological  name. 


J! 


SYNOPSIS   OF   NORTH   AMERICAN   SYRPHIDJE. 


117 


•7, — Wings  snbcinerescent ;  all  the  veins,  except  the  last  segment  of  the  fonrth, 
broadiy  clouded  with  blackish,  confluent  near  the  costa    ....     lugenB 

Wiugs  with  a  triangular  hyaline  space  behind  the  outer  end  of  third  vein,  the 

axillary  portion  more  or  less  subhyaline fusoipeunis 

8.— Wings  wholly  blackish latiuscula 

Wings  broadly  hyaline  from  before  the  tip  of  first  vein  to  tip  of  sixth  vein,  basal 
part  black dimidlata 

Wings  nearly  hyaline,  the  immediate  base,  the  costal  and  subcostal  cells  and  a 
broad  triangular  cioss-band  reaching  to  the  outer  part  of  the  sixth  vein, 
dark  brown torva 

For  otb('r  species,  see  descriptions. 

Baccha  Tarchetius. 

liuccha  T(irchetiu8  Walker,  List.,  etc.,  iii,  549. 
Habitat. — New  Jersey ! . 

$  .  Leagth,  10.5°"".  Distance  from  ocelli  to  base  of  antennae  consid- 
erably greater  than  thence  to  oral  margin.  Frontal  triangle  black,  a 
little  shining,  with  black  pile;  large,  with  a  large  semicircular  grooved 
space  above  the  base  of  the  antenna};  narrowly  whitish  pollinose  on  the 
sides  below,  like  it  is  on  the  face.  Basal  joints  of  antennae  yellowish, 
third  joint  short  oval,  brown;  arista  black.  Face  yellow,  thinly  whit- 
ish pollinose  on  the  sides,  in  the  middle  with  a  broad  shining  black 
stripe,  narrowed  below  the  tubercle.  Posterior  orbits  narrowly  whitish 
pollinose.  Tliorax  shining  greenish-black,  with  whitish  pile;  on  the 
pleurae  a  small  vertical  yellowish  spot.  Abdomen  moderately  slender, 
o])iique  black;  the  first  segment,  the  second  segment  narrowly  in  front, 
along  the  sides  and  a  posterior  band,  shining  metallic  green;  third  seg- 
ment narrowly  in  front,  a  posterior  band  a  little  dilated  in  the  middle, 
and  along  the  sides,  more  broadly  in  front,  narrowly  behind,  the  same 
metallic  green,  on  the  lateral  shining  places  near  the  front  a  small  yel- 
low spot;  fonrth  segntent  similar,  the  yellow  spots  larger  and  the  ])08- 
terior  band  more  dilated  in  the  njiddle;  remainder  of  the  abdomen 
wholly  shining;  the  second  segment  is  cylindrical,  the  third  much 
broader  behind.  Legs  yellow  ;  hind  femora  with  a  broad  ring  before 
tbe  tip,  the  hind  tibisB,  cxcei)t  the  base,  and  the  hind  metatarsi,  blackish. 
Wings  hyaline,  with  a  broad  dark-brown  anterior  border  filling  out  the 
tii'st  posterior  cell  to  a  little  beyond  the  cross-vein,  thence  following, 
hut  not  exceeding,  the  third  vein  to  the  tip;  a  small  hyaline  spot  in  the 
marginal  cell  near  the  origin  of  the  third  vein. 

One  specimen,  from  Mr.  Keen. 


•\ 


I  I. 


nl 


f\ 


Baccha  Babista.    (Plate  IV,  fig.  9. ) 

Bnccha  Bahinta  Walker,  List,  etc.,  iii,  549  ( ,J  ). 

Spazigasttr  h  icchoides  Bigot,  Annates  Soc.  Ent.  de  France,  1883, 326. 

Habitat. — Georgia,  Florida,  Arizona,  California ! 

?.  Length,  10  to  11'"™.  Face  considerably  projecting  below,  gently 
concave  below  the  antennae,  tubercle  large,  obtuse,  not  receding  below j 
light  yellow,  the  cheeks,  and  a  narrow  line  along  the  oral  margin  to 


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118  BULLETIN   31,    UNITED    STATES    NATIONAL    MUSEUM. 

coiiiio\!t  with  the  broad  facial  strijje,  shining  blacii.  Anteuuaj  reddi.sh 
brown,  third  Joint  eh)ngHte-oval.  Front  only  moderately  narrowed  iU 
the  verte:^'*  more  than  half  as  wide  as  at  the  base  of  the  antenna;,  shin 
ing  greenish  black,  on  tlu^  sides  below  the  yellow  of  the  face  extends 
\\\}  along  the  eyes;  the  distance  from  the  ocelli  to  the  base  of  the  an 
tennic  is  considerably  less  than  from  thence  to  oral  margin.  Eyes  ver,v 
little  convergent  on  lower  i)art  of  head.  Thorax  shining  greenish  blue, 
lileiu'ic  with  white  pile.  Scutellum  yellow,  brown  or  brownish  across 
the  <lisk.  Abdomen  slender  at  the  second  segment,  rather  broadly 
spatuliite  at  the  distal  i)art;  first  segment  black;  second  and  third  seg- 
ments brownish  black,  lighter  in  front;  on  the  sides  at  the  front  end 
yellow  iind  with  white  pile;  fonrth  segment  black,  with  a  yel'ow,  inter- 
mitted, white  i)ilose  cross-band  in  front ;  remainder  of  abdomen  more 
shining  metallic.  Legs  brownish,  tarsi  darker,  tip  of  femora  an«l  base 
of  tibia'  yellowish.  Wings  hyaline,  brown  along  the  front  border  from 
a  little  beyond  the  humeral  cross-vein,  more  blackish  on  the  stigma, 
reaching  back  in  the  miiUlle  to  or  beyond  the  origin  of  the  third  vein, 
and  then  evanescent  ontwards,  anterior  cross-vein  near  the  basal  third 
of  discal  cell ;  the  third  vein  joins  the  costa  immediately  before  the  tip. 

S .  Frontal  triangle  yellow,  black  immediately  above  the  antenniu, 
the  legs  somewhat  more  yellowish,  though  this  is  probably  not  asexual 
character.  The  wings  differ  distinctly  in  that  the  brown  is  wholly 
confined  to  the  sub-costal  cell,  blackish  at  the  stigma. 

Two  female  specimens  (Professor  Kiley)  collected  by  Mr.  William 
I'atton,  labeled  "  From  spring  larvae  among  Cotion  Aphides,  Selnia. 
Ala.,"  and  one  from  Arizona  (Professor  Comstock) ;  an  additional  sped 
men  (Professor  Jiiley)  with  the  label  "  Pn])a  found  in  Orange,  li.  S. 
Turner,  Saint  George,  Fla.,  May  7,  '80;"  also  two  male  specimens  (Pro- 
fessor Riley,  No.  532,  May  L>3,  '80),  Georgia  ? 

The  male  has  the  <',ostal  and  marginal  cells  hyaline,  while  in  the  female 
they  are  both  in  large  [)art  brown,  yet  it  seems  almost  sure  that  they 
belong  to  the  same  species. 

Baccha  lugeiis. 

Bavdia  liu/ciis  Loow,  Ceutiir.,  iii,  24. 

Habitat.— :Sew  York  (O.  S.),  Southern  States! 

c5 .  Length,  10""".  Front  black-bronze,  black  pilose,  above  the  an- 
tenna' yellow  spotted.  First  two  joints  of  the  antennai  yellow,  black 
])ilose;  third  joint  Vdack.  Dorsum  of  thorax  and  the  scutellum  black- 
bronze,  moderately  shining,  the  color  of  the  scutellum  somewhat  red- 
«lish  bronze ;  lower  half  of  pleurje  white-pollinose.  Abdomen  black. 
oj)a(iue,  not  clavate  near  the  tip,  the  base  ahd  apical  margin  of  each 
segment  shining  fuscous,  ultimate  segment  wholly  shining,  sub-viola- 
(reous  black.  Legs  black,  front  and  middle  femora,  except  the  tip,  base 
of  hind  femora,  and  of  the  front  and  middle  tibia^-,  yellow  or  yellow- 
ish red.     Halteres  sordid  whitish,  head  with  a  black  spot.     Wings 


?, 


i      '' 


'     iV 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDyE. 


119 


n,  bfise 


Wiugs 


sub  ciueresceiit,  all  the  veins,  except  the  last  segment  of  the  fourth 
vein,  broadly  clouded  with  black,  confiueiit  near  the  costa.  Face  yel- 
low, obsouie  on  the  sides,  with  opaque  yellowish  pollen. — Translation. 
Two  male  si)ecimen8  from  Professor  Kiley  without  locality  (No. 
48"),  .June  2,  1880,)  evidently  belong  to  this  species.  The  front,  how 
j'ver,  lacks  the  yellow  spots  above  the  antenna;.  The  face  in  prolile  is 
narrow,  only  a  little  widene«l  at  the  tubercle,  nearly  perpendicular  and 
straight  above  it,  antl  very  receding  below,  the  cheeks  linear,  and  the 
I'ycs  v<'r^v  convergent  below.  The  meso-pleuric  are  whitish  pollinose,  as 
well  as  below.  The  legs  are  yellowish,  the  end  of  all  the  femora,  the 
end  of  front  and  nnddle  tibiit;,  and  nearly  all  of  the  hind  tibia',  and  all 
of  the  tarsi,  brown.  The  small  cross-vein  is  a  little  beyond  the  middle 
ot'tiM'  discal  cell,  and  rectangular;  the  clouding  of  the  wings  along  the 
veins,  brown. 

Baccha  fuscipennis.     (Plate  IV,  fij;. 8.) 

Jitiirha  fiiNcipcnuiH  Say,  J.,  Acad.,  Phil,,  iii,  100;  Coiupl.  Wr.,  ii,  8(5. 
OciiptamiiD  fancipeniiiH  Mat-quart,  Hist.  Nat.  Dipt.,  i,  554,  2;  tab.  xii,  fig.  1";  v.  d. 

\Vul|.,  Tijds.  V.  Eiit.,  xxvi,  1». 
Sjitplnin  Amixsns  Walker,  List,  etc.,  iii,  .')89. 
Siiriihiia  Itadara  Walker,  List,  etc.,  iii,  590. 
()c!i}il<iniiin  loiKjirei'i  'ix  Lnew,  Centiir.,  vii,  (Mi. 
OciinlamwifiixdpcniiiH  Osteii  Sackeii,  Cat.  Dipt.,  127. 
.'  Ocjipiamns  confnrmiit  Loew,  Ceiitiii-.,  vii,  (i7. 

Habitat. — New  England,  Florida,  San  Domingo,  Kansas,!  Guade- 
Ioii|)L'  (v.  d.  Wulp). 

S  ,  9  .  Length,  9  to  U""".  Antennie  situated  near  the  middle  of  the 
lioad  in  profile ;  black,  the  first  two  joints  and  the  third  below  some- 
times reddish  or  yellowish.  Frontal  triangle  considerably  longer  than 
the  contiguity  of  the  eyes,  wholly  bronze-black  with  black  pile;  front 
in  the  female  very  narrow  at  the  vertex,  greenish-black,  attenuated 
above  the  aniennre  by  the  yellow  of  the  face,  which  extends  up  along 
the  eyes  nearly  to  the  middle  of  the  front.  Face  nearly  perpendicular, 
very  gently  con(jave  below  the  antennie  to  the  tubercle,  thence  reced- 
ing to  the  oral  margin;  yellow,  on  the  sides  whitish;  cheeks  linear, 
eyes  converg»Mit  beh)w.  Thorax  bronze-black,  moderately  shining,  with 
two  v«'ry  fiiint,  slender,  less  shining  stripes;  scutellum  of  the  same 
color,  not  infrequently  somewhat  reddish.  Pleurae  whitish  pollinose. 
Abdomen  slender,  only  a  little  widened  behind,  in  the  male  opaipie 
black,  .sometimes  faintly  purplish,  the  tirst  segment  and  sides  of  the 
second  to  beyond  the  middle,  the  narrow  hind  margin  of  the  second, 
third,  and  fourth,  and  the  remainder  of  the  abdomen,  shining,  .some- 
what metallic;  fifth  segment  scarcely  longer  than  broad  in  both 
sexes;  in  the  female  the  abdomen  is  broader  throughout,  shining  red- 
dish, especially  on  the  front  part  of  the  second — fifth  .segmtMits,  the 
posterior  i)ortion  more  brownish  or  even  blackish.  Legs  yellowish  ; 
the  tip  of  the  hind  femora,  and  sometimes  the  tip  of  the  front  and 
iniddii-  femora,  the  tip  of  front  and  middle  tibia},  and  nearly  all  of  the 


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hind  piiir,  jiiul  all  the  tarsi,  brown ;  the  hind  tibiae  and  tarsi  usually 
darker,  nearly  blaekish.  Wings  usually  dark  brown,  more  blackish 
toward  the  stifjnia,  with  a  large  triangular  hyaline  spot  near  the  tip, 
reaching  from  the  third  vein  to  the  hind  margin  as  far  as  the  t\\)  irf  tiie 
(liscal  cell ;  the  axillary  fingle,  the  anal  cell,  the  larger  part  of  the  third 
josterior  cell,  and  somewhat  in  the  tliscal  cell,  lighter  brown,  sometimes 
Miiolly  hyaline,  with  a  brown  band  filling  out  the  end  of  the  discal  cell 
{viiT.  fascipennis  Macq.),  rarely  there  is  a  hyaline  streak  along  the  mid 
die  of  the  marginal  cell ;  anterior  cross  vein  near  middle  of  discal  cell. 

This  description  is  chiefly  based  upon  numerous  specimens  collected 
in  the  vicinity  of  ^New  Haven,  among  which  the  wings  vary  very  much 
in  the  color  of  the  posterior  border.  Other  specimens  differing  scarcely 
at  all  from  the  more  typical  ones  I  have  from  Florida  and  Kansas.  Ac- 
cording to  Dr.  Loew,  his  Ocypt  lonffiventris  differs  Irom  fuscipennis  in 
the  wings  being  larger  and  the  picture  different,  but  a  large  number 
of  specimens  show  that  the  coloring  of  the  wings  is  variable,  and,  in 
such  frail  flies,  the  size  of  the  wings  is  a  doubtful  character.  It  seems 
to  me  very  probable  that  Ocypt.  conformh  is  also  a  synonym  of  this 
species. 

Of  the  synonymy  of  Ocypt.  fa soipennis  Macq.  there  can  be  no  doubt, 
I  think.  The  hyalinity  of  the  wings  in  extreme  examples  might  indi- 
<'ate  the  two  varieties  to  be  "  bestiinmt  verschieden,"  as  Schiuer  thought 
(Novara  Exped.,  34G,  14),  but  a  larger  mmiber  presents  too  many  in- 
ti'ruiediate  forjus. 

Baccha  aurinota.     (Plato  IV,  f\ff.  7. ) 

JIttrcha  aiirinotn  (Harris)  Walker,  List,  etc.,  iii,  .548. 

Jiaccha  faanpetiuin  Wiedemauii,  Auss.  Zw.  Idh.,  ii,96;  v.  d.  Wiilp.  Tijdscbr.  voor. 
Kiitoni.,  XX vi. 

Hahitat. — Connecticut.Massachusetts, Indiana!,  New  York,  Canada. 

$  .  Length,  10  to  11'""'.  Pace  yellow,  extending  up  narrowly  on  the 
lower  part  of  the  front,  more  reddish  shining  in  the  middle;  nearly  per- 
pendicular, an<l  gently  concave  to  the  tuber<!le,  thence  much  receding 
to  the  oral  margin;  cheeks  extremely  narrow,  the  eyes  approaching  the 
oral  margin;  the  distance  between  the  eyes  below  not  two-thirds  the 
width  of  the  face  below  the  anteniue.  iVntennae  brown,  the  under  side 
of  the  third  joint  reddish  yellow.  Front  very  nan-ow  above,  separated 
oidy  by  the  width  of  the  ocelli  at  the  vertex;  sl'ining  black,  narrowly 
|)(dlinose  along  the  eyes,  above  the  root  of  each  antenna  a  reddish  yel- 
low spot  more  or  less  confluent,  leaving  a  rounded  black  spot  between 
the  x'oots  of  the  antennie  above.  Dorsum  of  thorax  metallic  greenish 
black,  with  three  median,  slender,  grayish  j)ollinose  stripes;  pleurte 
thickly  grayish  polHnose  and  with  white  pile.  Scutellum  and  the  hind 
part  of  the  thoracic  dorsum,  in  the  middle,  shining  golden.  Abdomen 
slender,  black,  shining;  the  front  part  of  the  third  and  fourth  segments 
with  small,  iuterrupt<^d,  yellowish-red,  white  pollinose  cross-bands;  pos- 
terior portion  of  the  second,  third,  fourth  segments,  and  the  remainder 


I  ! 


SYNOPSIS   OF   NORTH   AMERICAN   SYRPHID^. 


121 


of  tlie  abdomen,  more  metallic  shining.  Wings  hyaline,  the  base  to 
tbe  humeral  cross-vein,  and  a  large  quadrate  spot  on  the  middle,  black- 
ish bro\7n;  the  spot  is  more  blackish  on  the  stigma,  brownish  behind, 
reacliiiig  to  ne4ir  the  middle  of  the  third  posterior  cell;  the  tip  of  the 
costal  cell  is  hyaline,  and  the  tip  of  the  snb-costal  yellowish.  Legs  red- 
(lisli  or  brownish  yellow,  the  end  of  hind  femora,  the  most  of  the  hind 
tibiie,  and  all  the  tarsi,  brown. 

Two  male  specimens  from  Connecticut,  tha»t  apparently  belong  to  this 
species,  have  the  facean<l  front  metallic  green,  the  tubercle  and  a  lunule 
iiltove  the  antenna?,  inclosing  a  small  black  spot,  yellow.  They  are, 
moreover,  smaller,  (9  to  10"'"')  and  the  brown  of  the  wings  is  much  less 
intense. 

The  name  B.  fascipennis  would  have  priority  were  it  not  so  nearly 
identical  with  B.  fuseipemm  Say  as  to  render  its  use  highly  objection- 
able. 

Baccha  lemur. 

Burcha  lemur  OHteii  Sackou,  Western  Diptera,  331. 
Habitat. — California,  Wyoming,  New  Mexico  (O.  S.)! 

Lengtli,  10  to  11""".  Wings  hyaline,  with  an  incomplete  cross-band 
between  the  stigma  and  the  fourth  posterior  cell;  abdomen  with  twc  red 
cross  bands.  Front  and  vertex  metallic  greenish  black,  the  former  (in 
the?)  whitish  pruinose  along  the  eyes;  face  whitish  pruinose,  its 
ground  color  variable,  dark  metallic  green,  with  more  or  less  brownish 
yellow  on  the  sides  and  on  the  i'acial  tubercle,  or  entirely  yellowish ; 
antenna}  brown,  or  reddish  brown,  inserted  on  brownish  yellow  ground. 
Tliorax  metallic  gre-aish  black,  with  vestiges  of  whitish  pruinose  stripes 
anteriorly;  jjleurae  whitish  pruinose,  with  white  pile;  scutellum  trans- 
lucent, yellowish  brown,  with  a  metallic  reflection ;  halteres  with  yel- 
low knobs.  Abdomen  black,  shining,  with  bronze  and  bluish  reflec- 
tions, a  broad,  blood-red  cross-band,  slightly  emarginate  in  the  middle 
posteiiorly,  at  the  base  of  the  third  and  fourth  segments ;  these  cross- 
bands  are  slightly  pruinose;  the  sides  of  the  abdomen  beset  with  white 
pile.  Legs  pale  yellow;  hind  femora  and  tibiae  usually  each  with  a 
brownish  ring ;  sometimes  the  legs  are  more  brownish,  especially  out 
the  femora.  Wings  hyaline;  the  root  before  the  humeral  cross-veiu 
and  the  extreme  base  of  the  second  basal  cells  is  infuscated,  costal  cell 
hyaline,  but  the  interval  between  auxiliary  and  first  veins  is  pale  brown- 
ish ;  stigma  dark  brown,  the  corner  between  the  costa  and  the  end  of 
first  vein  yellowish ;  a  brown,  incomplete  cross-band  between  the  first 
and  fifth  veins ;  it  coalesces  with  the  brown  stigma,  leaves  hyaline  the 
extreme  i)roximal  end  of  the  submarginal  cell,  covers  the  small  cross- 
vein  and  the  cross-vein  at  the  base  of  the  discal  cell,  but  reaches  only 
very  little  beyond  either,  and  ends  at  the  fifth  vein,  filling  uj)  the 
proximal  end  of  the  fourth  i)08terior  cell. 

Habitat. — Santa  Monica,  Cal.,  February  18 ;  Summit  Station,  Sierra 


\. 


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122  BULLETIN   31,    UNITED   STATES    NATIONAL   MUSEUM. 

Nevada,  J  111  J' 1 7 ;  Fort  Bridger,  Wyo.,  August  4;  Morino  Valley,  X, 
jMex.,  July  I ;  W.  L.  Carpenter.  One  male  and  three  females. — O.steu 
Sacken,  1.  c. 

Description  coini)ared  with  the  type  specimen  at  Cambridge. 

Baccha  costata. 

Ilacchd  (««/((/(«  Say,  .T,  Aciul.  Phil.,  vi,  KJl ;  Coinpl.  Wr.,  ii,357. 

Habitat. — Indiana  (Say). 

"IJody  hliick;  tergum  with  white  bands;  head  silvfu'y;  a  shining  black 
line  fVoiii  tho  vertex  to  the  njouth,  much  contracted  on  the  middle  of  the 
front.  Antenuii'  obsoletely  honey-yellow  at  base.  Occiput  plumbeous 
■with  a  silvery  retlection.  Thorax  black.  Poisers  white.  Wings  liyu. 
line  with  a  somewhat  narrow  costal  margin  not  rea<'.hing  the  tip.  Scute 
margined  witli  yellow,  Tergum  black  ;  Hrst,  se<!ond,  and  third  scjj 
ments  with  iiri  oblique  white  s])ot  on  each  side  at  base,  and  remaiiiiiij; 
{segments  tipped  with  yellow-white;  feet  black;  anterior  pairs,  base  of 
the  tibia,  and  tip  of  the  thighs  honey -yellow;  posterior  tibiae  honey- 
yellow  at  base.     Length  half  an  inch." — Say,  1.  o. 

Baccha  latiuscula. 

OtjiplamuH  latiuHVHliiii  Loew,  Ceiitnr.,  vil,  68. 

IlahitHt. — San  Domingo!,  Cuba  (Lw.). 

(?  ,  9  .  Length,  (>'""'.  Black,  moderately  shining.  Front  shinhig  hluc 
black ;  in  the  male  tlH>  frontal  triangle  large,  shining  black,  narrowh 
yellow  on  the  sides.  Face  yellowish  white,  with  a  black  stripe  in  tlio 
middle,  often  obsolete.  Antennje  black.  Abdomen  rather  broad,  di- 
pressed,  widest  at  tip  of  second  segment,  thence  slightly  narrowed ;  in 
color  shining  purplish  black.  Legs  black.  "Wings  black,  towards  the 
posterior  nuirgin  less  so. 

Three  male  and  one  female  si)ecimens,  San  Domingo  (G.  F.  Frazar.i 
One  male  si)ecimen,  which  is  apparently  the  same,  has  the  frontal  tri 
angle  nearly  wholly  yellow,  the  antennae  in  large  part  yellowish,  a 
small  spot  on  the  humeri  and  another  on  the  post-alar  callus,  yellowish 
red,  the  scutellum  obscurely  yellow,  the  abdomen  chiefly  opaque  black, 
with  a  large  obscurely  reddish-yellow  spot  on  the  angle  in  front 
of  the  second  and  third  segments,  and  the  four  front  legs  chiefly  hue 
ous.  It  isapparently  an  immature  specimen.  Loew's  specimens  showed 
in  a  less  degree  sinnlar  difl'erences.  ("  Scutellum  aeneo-nigrum,  vel 
aineo-i)iceum.  Abdomen  media  segmentorum  singulorum  parte  purius 
nigra  et  magis  opaca.")  The  species  differs  from  B.  diviidiata  chiefly  iu 
the  wings  not  being  hyaline  on  the  outer  part. 

Baccha  cognata. 

Baccha  cognata  Loew,  Ceiitur.,  iii,  27. 

Habitat.— ^e\v  York  (O.  S.) ! 

9  .  Length,  "'"'".     Blackish  bronze,  head  concolorous,  the  lower  half 
of  the  face  and  the  antennae  yellow.    Humeri  and  pleurae  yellowish. 


Ill 


SYNOPSIS   OF   NORTH   AMERICAN    SYRrUID.E. 


123 


tbdoiiH'U  blackish  bronzf,  basal  fascia'  of  the  third  aiul  fourth  soy- 
ut'Uts,  soiuetinies  also  of  the  fifth,  yellow.  Wiiijjs  subhyaliue,  apical 
liiarj>iii  aiid  the  stitfina  smoky,  the  base  of  the  latter  black. 

Similar  to  11.  ohncuriconiin.  Head  bronze  black,  lower  half  of  the  face 
yiow ;  front,  except  a  median  stripe,  and  face,  except  the  tubercle, 
lliiiily  clothed  with  whitish  pollen,  on  tin*  oc<'ii)ut  more  thickly  polli- 
pose.  Dorsum  of  the  thorax  black  bronze,  the  humeri  dilutely  yellow- 
sh.  IMeiine  dilutely  yellowish  ov  a  little  reddish,  below  obscurely 
eiii'sccnt.  Scutellum  of  the  sanu^  <;olor  as  tlu'  thorax.  Abdomen  slen- 
lltT,  black  bronze,  near  the  tip  fuscous  bronze  third  and  fourth  sejjf- 
Du'iits  always,  tifth  fre<|uently,  with  a  basal  yellow  fHS(;ia.  Lej,'s  yellow 
pilijilit  reddish,  hind  femora  near  the  tip,  the  tibiio  and  tarsi  luiarly 
rliolly,  dilutely  subfuscous.  Winjjs  subhyaliue,  lij;htly  cinerescent, 
leiiis  blackish;  cross- veins  lightly  clouded;  stifiiiia  elonj^ate,  smoky, 
ritli  a  basal  black  spot ;  apical  marifin  of  the  winji;  smoky. 

Triiuslation  of  the  original,  comj)ared  with  the  type  specimen  at  Cam- 
bridge. 

Baccha  obacuricoriiis. 

Haccha  ohnfiiriconiiH  Lotnv,  Ct'iiTur.,  iii,  '^6. 
Jlavvlia  uiDjHxIa  OHtcii  SackiMi,  WestiTii  Dipt.,  S32. 

Habitat — Sitka  (Lw.),  ('alifornia! 

<?  9.  Length,  7""".  Ilea<l  bronze  black,  front  nearly  wholly,  frontal 
kiiau}ile,  and  the  face  excej)!  the  tubercle,  thinly  white  pollinose,  the 
pcciput  more  thickly  so.  Antenna'  wholly  brown  or  black.  Dorsum  of 
kliorax  and  scutellum  bronze  black.  I'leurse  very  i)allidly  testaxH-ous, 
pr  al)()ve  yellow  ami  below  subfuscious.  Abdomen  slender,  blackish 
luscoas,  somewhat  nu'tallic  bronze,  the  base  usually  brcmze  black,  the 
Ibiid  and  fourth  segnuints  always,  the  fifth  freiiuently,  with  a  basal 
frellow  fascia.  Legs  yellow  or  dilutely  testaceous;  the  hind  femora 
bear  the  tip,  the  tibia;,  aud  tarsi  almost  wholly,  subfuscous.  Wings 
bubliyalino,  lightly  cinerescent,  veins  fuscous  black;  the  transverse 
teius  obsoletely  clouded  with  smoky  ;  stigma  elongate,  snu)ky,  with  a 
"):i.sil  black  spot ;  ai)ical  margin  and  the  jmsterior  ai)ical  half  clouded 

or  the  synonymy  of  B.  aiu/unta  there  can  be  no  doubt,  and  its  i<ieutity 
vitii  7^  clo)Kjat(i  of  Europe  seems  very  ])robal)le.  I  have  only  an  Euro- 
Dean  male  for  comparison,  but  I  can  lind  no«.other  ditiferenciea  than  in 
Ibc  color  of  the  antenna;,  which  are  red.  Loew  adds  to  his  description : 
rA  Baccha  elongata  fronte  mimis  a;quali  et  antennis  totis  atris  dif- 
lert";  but  the  third  joint  of  the  antenna^  in  my  specimens,  as  in  the  one 
R'hicli  Osten  Sacken  described,  is  brown  or  brownish,  so  that  this  dif- 
lerence  loses  much  of  its  value,  and  there  only  remains  the  diti'erence  in- 
file  width  of  the  female  front.  As  I  have  no  female  specimen  of  B. 
fhngatn  for  comparison,  I  cannot  give  any  opinion  as  to  the  identity  of 
Miat  Loew  believed  to  be  two  diiierent  sp«H'-ies, 


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124  BULLETIN   31,    UNITED    STATES    NATIONAL    MUSEUM. 

Baooba  torva,  n.  np. 

flahitaf. — 'IVxiik  ! 

9.  Leiij^tli,  !)  to  10""".  Cheoka  oxtn-iuely  narrow;  t'ac*'  wliollyyJ 
low.  Front  very  nurrow  iibov**,  Nliinin;,'  black,  yt'llow  on  the  sides  iJ 
low;  two  Hniall,  yellow  n|»ots  just  above  the  base  of  the  antenna".  aJi 
teniiOB  blavik,  third  Joint  oval,  thickened.  Thorax  black;  humeri,  a!<ii(,| 
on  the  outer  end  of  the  sutun*,  th<^  i)ost-alar  callosities,  and  siMitcllu 
yellow  or  luteous,  the  latter  more  brown  on  the  disk.  Abdomen  cluti 
pite.  shininjf  brownish  black,  anterior  outer  part  of  the  secondfoiirtj 
sefjmeuts  more  luteous ;  broadest  at  the  tip  of  the  8econ<l  Ne;;iii('ii'r 
hviis  luteous,  the  hind  i»air  blackish;  hind  tarsi,  except  the  hist  titl 
joints,  light  yellow.  Win{,'s  nearly  hyaline;  the  immediate  base,  ttJ 
costal  and  subcostal  cells,  and  a  broad  triangular  cross-band  reaciiiul 
to  the  outer  part  of  the  sixth  vein,  dark  brown. 

Jne  specimen,  Texas  (National  Museum,  Professor  liiley's  collwl 
tion). 

Baccha  oapitata. 

Jtaciha  capiiata  Loew,  Centur.,  iii,  26. 

Hahitiif. — Cuba  (Loew)l 

S.  Length  12""".     Fuscousochraceous,  opaque,  rather  bare.     Iltadl 
thoracic  strij)es,  sjmts  of  the  pleuroi,  scntellum,  and  abdominal  fiistul 
light  yellowish.     Hind  femora  and  the  hind  tibije,  on  their  distal  liiil,| 
fuscous.    Costa  of  tin;  wings  rather  broadly  clouded  with  subfiiscoiK 
near  the  tij)  fuscous. 

Ilead  large,  light  yellow;  frontal  lunule  fuscousochraceous,  ciiciiin 
scribed  with  fuscous.     Antennae  obscurely  ochraceous.     Occiput  hlacL 
white  poUinose,  the  pollen  of  the  orbits  light  yellow.     Dorsum  di'  tliil 
thorax  fuscous-ochraceous,  opaipie,  with  four  light  yellow  stripes,  the  ill 
termediate  ones  posteriorly  acute  and  moderately  abbreviated,  tlii'liiil 
eral  ones  broadly  interrupted.     Scutellum  light  yellow,  near  the  tip! 
usually  fuscous ocbraceous.     Pleuroe  with  light  yellow  spots,  varie^'attiil 
with  obscure  ochraceous  and  fuscous.  First  segment  of  the  abdomen  yelj 
low,  with  a  fuscous-ochraceous  i)osterior  fascia ;  remainderof  the  iibdi^ 
men  fuscous-ochraceous,  with  ochraceous  i)ile,  clothed  more  thickly  iita| 
the  tij)  of  the  abdomen  ;  the  second  r.egment  has  at  its  base  a  yellowisli 
cross-band  ;  third  segment  with  a  rather  broad,  light-yellow  cross!  mini: 
fourth  at  its  base  with  a  narrow,  saturate-vellow  band.     Legs  oclinil 
ceous ;  hind  femora,  except  the  base  and  tip,  and  the  distal  half  i 
the  hind  tibite,  fuscous.     Wings  hyaline,  the  costal  border  rather  broaillj| 
clouded  with  ochraceous-snbfulvous,  fuscous  near  the  tlj). 

Translation  from  the  original,  compared  with  the  type. 

The  stripes  of  the  thorax  and  bands  of  the  abdomen  would  be  morel 
properly  described  as  light  ochraceous.  It  is  a  beautiful  large  specie.s| 
characterized  especially  by  its  general  light  color. 


Ii! 

1 


SYNOPSIS    OF   XORTII   AMERICAN    SYRPIIIDX. 


12: 


iBaecha  dimldiata.    (Pluto  V,  H-.  10.) 

SiiriilniH  (liniiiliiitiin  VnUr'uiu)*,  Spt'cii's  Inst'ti.,  ii,  4:i4,  l>4;  Kiit.  SyHtcin.,  iv,  310, 

IIM;  Wii'ilciniimi,  Auhm.  Zw.  Ihh.,  ii,  ll(»,  W. 
Scafya  dimitlitiila  Kiildiciiis,  Synt.  Aiitl..  '^'.4,  'Jf). 
nviiptumiiH  iliiiiidiatiiH  Siliiiior,  Ndvuiii  I'.xiii-d.,  ItKi;  OMteii  ISackfii,  Cat.  Dipt. 

Utihital.—Went  IiidU's!  Bia/.il  (S<'liinor). 

9.  Length,  <>""".  Front  .sliiiiiii;,'  violet  hliick,  very  narrow  iihovc,  with 
Lhot't  blackish  pile.  Antenna'  brownish  bhick,  tliirti  Joint  siibtrian^u- 
llar.  E.v«'s  ninch  eonveryent  beh)W.  l-'ac*'  yeUowish  white,  oliseurely 
|li|;ickisli  in  tiie  niichUe,  and  «)n  the  oral  inarj^in;  sometimes  wliolly  yel- 
jldwish  white  and  extt'ndiii,u"  np  on  the  sidewof  the  front  l»eh)W.  Thorax 
LliiniiiH  Itrownisli  bhiek ;  phMUie  whitish  pollinose.  Ab(h)nien  bare, 
Idcop  siiinin^,  somewhat  metallic^  brown,  only  a  little  elongate,  not  reaeh- 
liiij;  to  the  tip  of  the  wings,  broadest  at  tip  of  second  segment,  tlu'nce 
Lciitly  n.irrowed  to  the  tij*  of  tlie  (Ifth  sej,'inent.  Vent«'r  <»bscnrely 
jiuowiiish  yellow.  Lefrs  blackish  brown.  Winjis  blackish  brown  on  the 
Ibasal  half,  hyaline  on  the  outer  i)ortion;  the  border  of  the  biown  extends 
laiToss  nearly  straight  from  before  the  tij)  of  the  tirstlouyitudinal  veiu  to 
|tlii'  tip  of  the  sixth. 

Four  spe<!imens,  Wan  Doininj;()  (G.  F.  Fi'azi-r). 

ADDITIONAL  NORTH  AMERICAN  .SPECIKS. 


|Baccha  clavata  Faliricius,  Syst.  Aiitl.,  i!00,  ;i;  Wicdcinaiiii,  Ahhs.  Z\v.  Ins.,  ii,  94,4; 
ScliiiuT,  Noviira  Exi>t'<l.,  :itl.     S.  Am.  (Scliiiicr) ;   W.  In(!i<^M  (0.  S.). 
Sjirphiix  claviitiin  FaUriciun.  Ihit.  Syst.,  iv,  yiW,  7;J. 
iBaccha  cochenllMvora  (ineriii,  Kt'v.  Ziml.,  184t^,  'SM;  Bull.  Moo.  But.,  1:^48.  Guatam. 
iBaccha  conformis. 

ilciiptaiiiim  ciin/drmin  Loi'sv,  Ci-iitiir.,  vii,  ()7.     Ciilia. 
IBaccha  cubensia  Jlaciiiiart,  Diiit.  Exot.,  lo  .'^iijipl.,  Kil,  T).     Cuba. 
JBaccha  cylindrica  FabriciuH.  Syst.  Antl.,  IW, 'i;  WiidtMiianu,  A.  Z  ,  ii.  1)2. 

Siirpliiix  (ujUtidricuH  Fahricius,  Spec.  Iu,si'(!t.,  ii,  '-'4'.),  41  ;  Eiit.  JSyst.,  iv,  21*8,  74. 
IBaccha  faaciata  Riii'.iT,  Stott.  Ent.  Zeit.,  I8sr>,  '6\'i.    Porto  Ri<o. 
IBaccha  fratenia  Hij;(tt,  Ann.  Soc.  Eut.  <lt'  Ti.,  l^^:?,  'i'i\  {OviiptamiDi).   Mexico. 
IBaccha  funebris. 

(ki/ptamuu  fiini-briH  Mactiuart,  Hist.  Nut.  Dipt.,  i,  .').'J4,  1;  Dipt.  Exot.,  ii,  105; 
Bigot  in  Rnniou  do  la  Sagra,  etc.,  H07  ;  Schincr  Novara  Exped.,  34fi('*Ob 
Hie  niit   Maccjuart's  Oey[)taniUH  fafcijuMinis  [B.  fuscipennis]  ideutiscli  iat, 
vermair  ich  nicht  zu  entseheiden.") 
IBaccha  iufuscata  Bi^ot,  Ann.  Soc.  Ent  de  I'r.,  Ibi?:!,  \V2i  {Ocyptamiin).     Mexico. 
|Baccha  liueata  Macquart,  Dipt.  Exot.,  ler  suppl.,  V.\d,  4;  pi.  20,  fig.  .5,     Yucatan, 

Texan  ? 

IBaccha  luctuoaa  Bif^ot,  Ann.  Soc.  Ent.  do  Fr.,  1883,  334.     Mexico. 
IBaccha  marmorata  Bif^ot,  Ann.  Soc.  Ent.  de  Fr..  1883,  333.     Mexico. 
IBaccha  iiotata  Eoew,  Centnr.,  vii,  (if).     Cuba. 

IBaccha  parvicornis  Loew,  Wien.  Ent.  MonatH.  v,  41;  Centur.,  vii,  64.    Caba. 
[Baccha  rufiventris  Bigot,  Ann.  Soc.  Eut.  do  Fi.,  I»ti:i,;i)i:){0cyptamu8).   Cuba.   [sA 

dimidiatafi 
IBaccha  scutellata  Loew,  Centnr.,  vii,  69  {Oeyptamits),    Cuba. 


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126    BULLETIN  31,  UNITED  STATES  NATIONAL  MUSEUM. 


CHALCOMYIA.* 

C/ialconii/irt  Williston,  Bull.  Hrooklyn  Eutoni.  Soc,  vol.  vii,  p.  133. 

Moderate  sized,  nearly  bare,  metallic  bronze  species.    Eyes  bare,! 
broadly  separated  in  the  male.     Antenna'  situated  ui)on  a  strong  conij 
cal  projection,  especially  in  the  male,  first  two  joints  short,  third  orbica- 
lar ;  arista  basal,  bare.     Face  in  the  male  {jently  convex  from  below  tlie| 
antennal  i)rocess;  in  the  female  concave  I'roiii  the  antenna',  to  the  tip, 
but  most  so  below  the  middle;  face  produced  but  little  below  the  eyes,! 
Scutelluui  large  and  projecting,  nearly  square,  with  the  outer  angles 
rounded,  thinned  on  the  margin,  and  shallowly  grooved  on  the  diskj 
Abdomen  thittened,  broadly  oval  in  outline.     Legs  rather  stout ;  liin 
femora  moderately  thi<;kened;  hind  tibia*  genti}' arcuate ;  hind  inctaj 
tarsi  as  long  as  the  four  following  joints,  not  thickened.     Marginal  cell 
of  wing  open,  third  longitudinal  vein  nearly  straight,  anterior  crossl 
vein  obli(ine,  situated  a  little  before  the  middle  of  the  discal  cell.    Tyi)e| 
of  genus  C.  arrca  Loew,  Nortii  America. 

Chalcomyia  aerea.     (I'liitc  IV,  lig.  II.) 

Miiiol<])l<i  (u'H'tt  Loew,  Ceiitur.,  x,  53. 

JIahitat. — Virginia!  Illinois  (Lw.). 
^,9.  Length,  (5  to  7""".    Greenish  brouze-color,  shining,  clothed  witlil 
short  yellow  pile.   Front  of  the  female  with  a  whitish  judlinose  cross-baiidl 
Di'rrowly  interinpted  ;  n)ale  with  a  narrow, obsolete  cross-band, exk'i 
big  narrowly  down  along  the  eyes.     Margin  of  the  antennal  i>root'ss;it| 
the  base  of  the  antenine  red.     First  two  joints  of  the  antenna^  reddisli 
brownish,  third  join',  more  brownish-reddish,  blackish  on  the  upper  part;! 
arista  luteous.     Free  in  the  female  shining  black,  except  a  yelJDwisli 
pollinose  stripe  th.it  runs  from  the  eyes  oldiipiely  to  the  oral  margin:  iiil 
the  male  the  siiies  of  the  antennal  procH'ss  and  the  face  below  the  pioj 
cess   Jiickly  covere  1  with  satiny  yellowish  pubescence,  when  viowd 
from  above,  wholly  concealing  the  ground  color,  and  changeable  in  dil 
ferent  lights,  the  under  side  of  the  process  showing  the  ground  colorl 
more  distinctly.     Anterior  margin  of  the  thorax  white  pollinose.    Alt  [ 
domen  more  bronze-colored,  with  yellow  pile,  longeron  the  sides  in  t'nmt, 
Legs  black,  extreme  tij)  of  the  temora,  basal  third  of  liie  tibia',  and  liujtl 
three  joints  of  the  tarsi  re  liish-yellow  ;  hi?id  femora  in  the  luale  ii  little 
more  thickened  than  in  the  female  and  with  a  slight  protuberance  below 
near  the  base.    Wings  sublutescent,  the  veins  near  the  ti[)  and  posterior | 
margin  fusoous. 

Two  specimens.    Virginia  (Mr.  Theo.  Pergaude). 

•  Sa^Koc,  copper,  aud  fivta,  fly. 


I 


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SYNOPSIS    OF   NORTH    AMERICAN    SYRPHID^. 


127 


MYIOLEPTA.* 

Myoli'pta  Newman,  Ent.  Mag.,  v,  :{7:?,  1838. 
Xyloteja  Kondani,  Dii)t.  Ital.  Prodr.,  ii,  '.Hi,  18.">7. 

Moderate  sized,  bare  species,  metallic,,  black,  or  black-green;  on  the 

I  abdomen  an«l  face,  sometimes  with  luteous  side  spots.  Head  broad,  a 
little  flattened.  Antenn.c  short,  sitnated  npon  an  obtuse  conical  pro- 
jection; tirst  two  Joints  short,  third  rounded  or  oval,  with  a  basal,  bare 

laristii.  Face  strongly  concave  in  outline  below  the  anteniue,  projecting 
lielow,  in  the  male  with  a  tubercle  near  the  middle.     Eyes  bare,  contigu- 

I (Ills  In  the  male;  the  front  somewhat  narrowed  behind  in  the  female. 
Thorax  somewhat  narrowed  in  front.  Scutellum  black,  thinned  near 
its  l)order.  Abdomen  about  twice  as  long  as  the  thorax,  and  as  broad 
or  Itioader,  somewhat  flattened,  oval  or  ovate.  Legs  stout,  all  the  fe- 
mora somewhat  thickened,  but  more  especially  so  the  hind  pair.     Mar- 

|;;iiial  cell  of  the  wings  open ;  third  longitudinal  vein  nearly  straight;  »n- 
ii'iior  cross-vein  towards  the  base  of  the  discal  cell. 
Type  of  genus,  .1/.  luteohi  Gmelin. 

TABLE  OF  SPECIES. 

1 1.— Face  on  the  sides  below  with  a  large  liiteons  spot ;  third  joint  of  an- 

tenniu  ovate strigilata 

Face  without  such  spot       2 

|2.— Lt'<;s  wholly  black bella 

Tiii'si  and  tibia-  more  or  less  yellow 3 

|3.— Alidonien  lilack •     .     .    nigra 

AUlonien  with  luteous  or  yellow  si»ots  at  the  base varipea 

[Myiolepta  strigilata. 

Miliolcpla  xtrigilala  Loow,  Centur.,  x,  CA. 

Ildhifdt. — Texas,  North  Carolina! 

c?,  9.  Blackish  greenish,  moderately  shining,  wholly  clothed  with 
Isiiort,  rigid,  ai)pres8ed  white  pile;  antennas  tibi.e,  base  of  front  tarsi, 
j:iii(l  hind  tarsi  excej)!  the  last  two  Joints,  red  ferruginous;  third  Joint 
ji'ftlie  antenna',  ovate.     Length  of  body,  (>  to  7""" ;  of  wings,  5  to  (t""". 

IMiick-gi-eeii,  moderately  shining,  clotlicd  witii  sjioit,  rigid,  ap[)ressed 
|«iiitt'])il(\  Vertex  of  the  male  black,  siiining;  front  and  tiu!e(;Iot  lied  very 
[tiiickly,  with  dilntely  lutescent  i»ollen,  a  bare  si)ot,  however,  above  the 
jiiiiteniia? ;  facial  tubercle  and  (ilieeks  black  and  shining,  lower  jiart  (»f 
[tlic  luce  on  each  side  with  a  very  large  luteous  sjiot.  Front  and  face  of 
athi'  tV'iiiale  black  and  shining,  the  latter  on  the  lower  half  on  each  side 
rvitli  an  oblicpie  luteous  spot ;  tliese  spots  and  a  bisinuate  fascia  situated 
llu'low  tile  antenna;  wliitish  or  sublute.scent  pollinose  ;  the  renniinderof 
|tlie  face  not  pollinose.    Antennie  ferruginous-red,  near  the  base  more 

•  Mvia,  tly,  and  AtTrra,  Hue. 


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128  BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 

saturately  tinged,  third  joiut  ovate,  the  arista  coiicolorous.  Veutet 
cinereous,  with  white  pollen  and  briefly  white  pilose.  Femora  black. 
the  extreme  tip  reddisli  luteous  ;  tibia?  ferruginous  red,  near  the  base 
becoming  more  luteous,  anterior  ones  blackish  near  the  tip,  hind  ones 
fuscous  in  the  middle;  front  tarsi  black,  near  the  base  red,  hind  ones 
red,  last  two  joints  black.  Wings  very  dilutely  hitescent,  but  near  the| 
tip  cinereous  and  marked  with  a  median  fascia  more  i^bsoletely  ciiiores. 
cent. 

Translation  from  the  original,  (!omj)ared  with  the  type  specirneusl 
(three)  in  the  ^Museum  of  Comparative  Zoology.  In  the  single  male | 
sijecimen  the  appressed  pile  of  the  dorsum  has  a  more  yellowish  cast. 

Myiolepta  bella  (Plate  V,  tig.  2). 

Mjl'tolcpfa  bflla  Willistoii,  Trans.  Amer.  Phil.  Soc,  xx,  ^O'i. 

Habitat. — Washington  Territory,  Oregon! 
9.  Length,  7  to  8'""'.  Deep  black,  shining.  Front  with  very  short | 
black  i)ile  above,  not  at  all  ])ollinose;  face  bare,  not  ])ollinose,  iimcl 
produced,  in  profile  deeply  concave,  below  the  middle  briefly  and  geutlyl 
convex.  First  two  joints  of  the  antemiie  blackish,  third  joint  orbicu 
lar,  reddish  yellow;  arista  brownish  luteous.  Thorax  faintly  wliitisb 
])ollinose  on  the  anterior  nuirgin  ;  clothed  with  very  short  black  itile, 
longer  on  the  border  of  the  scutellum.  Ab<lonien  broadly  oval,  very 
shining,  clothed  with  short  white  pile.  Ilalteres  light  yellow;  tenuis 
white.  Legs  black,  with  black  i)il('.  Wings  lightly  tinged  with  brown | 
on  outer  i)art,  hyaline  on  basal  portion;  stigma  light  brown. 

Three  specimens,  Washington  Territory,  Mount  Hood,  Oregon. 

Myiolepta  varipes  (Plate  V,  ti<;s.  1,  la,  lb). 

Mjiiolepta  vuripi-x  Lucw,  Ceiitur.,  ix,  7it ;  Willi.ston,  Trans.  Aiuer.  Phil.  Soc,  u,| 

Mi/olepfa  liiiiiihitK  BiK<it,  Aiuialcs  Soc.  Eut.  Fr.,  1-84.  ri37. 

Habitat. — Virginia,  Washington  Territory.  California! 

(? ,  2  .  Length,  7  to  8""".     Black,  shining.     Front  in  female  narrowl,v| 
])ollinose  along  the  orbit  on  each  side;  in  the  male  the  frontal  triangle 
pollinose  on  its  margins.     AnteniiiT'  brownish  reddish,  in  some  s))e('i 
mens  more  distinctly  brown  throughout ;  basal  joints  more  blacidsli, 
the  arista  like  the  third  joint.     Face  in  the  female  in  profile  deepl.v  con 
cave  from  the  base  of  the  antenufe  to  a  little  above  the  oral  marfiin; 
shining,  with  a  broad,  white  pollinose  cross-band  below  the  anteuus; 
the  sides,  and  a  strii)e  running  from  the  eye  toward  (he  oral  uiarpii.l 
l>ollinose;  face  in  the  male  deeply  concave  to  a  little  below  the  miiklli'J 
Avhere  there  is  a  stnall  but  prominent  mammillate  tubercle,  everywhere 
denselj  white  pollinose,  except  on  the  tubercle  and  immediately  \whn 
it  and  on  the  cheeks,  where  it  is  shining;  the  lower  ])art  of  thefaceinbotli 
sexes  not  so  nnich  ])r()duced  as  in  the  allied  spe('es.     Dorsum  of  tliovaxl 
with  a  bronze  reflection,  (ilothed  with  short,  appressed,  yellowish  whitt; 
l)ile;  on  the  front  nuirgin,  interrupted  in  the  middle,  white  pollinose, 
Scutellum  shining  black,  with  yellowish  pile.    Abdomeii  black  j  theflrsi 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHID^. 


129 


segment  narrowlj^  yellowish  on  the  sides;  the  second  segment  with  a 
larijfe,  oval,  yellowisli  s-pot  on  each  side,  extending  rather  fnrther  back 
ill  the  male,  and  sometimes  narrowly  bordered  on  the  sides  behind  with 
black;  pile  short,  ap])ressed,  nearly  white.  Legs  black,  extreme  tij)  of 
all  tlie  femora,  basal  third  of  all  the  tibia;  and  more  or  less  of  the  tip, 
and  the  first  three  joints  of  tlie  middle  and  hind  tibifc,  Inteous  or  yellow. 
Wings  cinerous  hyaline,  toward  the  base  yellow,  in  the  middle  in  front 
with  a  large  subfuscous  spot ;  distal  part  of  the  wings  distinctly  brown- 
ish tinged. 

Three  female  speciimens  from  Washington  Territory  and  California 
and  one  male  from  Virginia  (Pergande). 

Myiolepta  nigra.    (Plate  IV,  fig.  1.'). ) 

MtjioJepta  tiigra  Lomv,  Centnr.,  x,  .")'2. 

Ilahitat. — Pennsylvania  (Lw.),  New  York,  North  Carolina! 

9  .  Length,  7  to  8.5""".  Black,  shining,  wholly  short  white  pilose. 
Front  shining,  on  ea<!h  side  near  the  eyes  narrowly  white  ])ollinose.  An- 
teiHiic  brownish  red,  the  tirst  joint  black;  third  joint  orbicular;  arista 
luti'ous.  Face  strcmgly  concave  in  i)rofile,  the  lower  part  considerably 
produced  ;  across  below  the  base  of  the  antenna;,  and  a  narrow  stripe  on 
each  side  running  from  the  eye  to  the  oral  margin, wiiite  pollinose.  Front 
margin  of  the  tinnax  lightly  whitish  pollinose.  Legs  black,  the  tirst 
three  joints  of  the  iniddle  and  hind  tarsi  light  yellow.  Wings  dilutely 
yellowish,  near  the  base  hyaline,  on  outer  i)art  faintly  blackish.  Hal- 
teres  dilutely  yellow  ;  tegula;  white. 

One  specimen ,  from  Professor  J.  A,  Lintuer. 


^   i 


RHINGIA. 

Rhingia  Scopoli,  Eutom,  Caviiiolica,  I'.'S,  17G:i. 

Jloderately  large,  plump,  bare  species.  The  abdomen  with  yellow- 
isli red  markings.  Head  hemisi»herical,  flat  behind,  somewhat  broader 
than  the  thorax.  Antenna;  s\un%  third  joint  short,  oval,  with  bare 
arista.  Proboscis  long,  slender,  divergent  at  the  tip.  Face  small, 
yellowish,  without  tubercle  below,  produced  into  a  long,  slender  snout- 
like epistoma,  under  which  the  proboscis,  when  at  rest,  lies  ensheathed. 
Eyes  naked,  contiguous  in  the  male.  Thorax  not  very  long.  Scutellum 
translucent-yellowish.  Abdomen  broader  thai>  thorax,  not  much  longer, 
oval,  arched.  Legs  slender,  femora  not  thick(;ned ;  hind  metatarsi  long, 
somewhat  thickened.  Marginal  cell  of  wings  oi)en,  third  longitudinal 
vein  gently  convex  anteriorly,  joining  the  costa  beyoiul  the  tip  of  the 
wing,  anterior  cross-vein  toward  the  base  of  the  discal  cell,  slightly 
oblique.    Type  of  genus,  R.  rnstrafa  Linn6,  FiUrope. 

A  well-marked  genus;  in  the  United  States  so  far  represented  only 
by  a  single  species,  which  occurs  in  the  Atlantic  States,  in  abundance 
ou  low  vogetation  near  brooks  and  in  ineadowlands. 


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BULLETIN   31,    UNITED   STATES    NATIONAL   MUSEUM. 


Rhingia  nasica.    (Plate  V,  fig.  3,  3a.) 

Ithint/ia  naaica  Say,  J.  Acud.,  Pliil.,  iii,  94;  Coin{>l.  Wr.,  ii,  81;  Wiedemann, 
AiiHS.  Z\v.  Ins.,  ii,  115,  1. 

Habitat. — Atlantic  States,  Indiana,  Kentucky! 

$  ,  9  .  Length,  8""".  Frontal  triangle  small,  blackish;  front  in  female 
black,  lightly  whitish  dusted,  i)ile  .short,  black.  Anteniue  yellowish- 
red,  third  Joint  cordate  in  outline,  a  little  larger  in  the  female.  Face 
red,  more  or  less  brownish  on  the  cheeks.  Thorax  shining  black,  with 
two  broad,  whitish  nollinose,  dorsal  stripes ;  pile  black,  very  short  in 
the  female.  Scntelluni  in  the  female  wholly  translucent,  amber-colored, 
with  very  short  pile,  except  a  row  of  black  bristles  on  the  border;  in 
the  male  largely  blackish  at  the  base,  the  i)ile  long(>r,  black,  and  with 
a  row  of  black  hairs  on  its  border.  Abdomen  black,  with  two  pairs  of 
large  yellow  or  reddish  spots  on  the  second  and  third  segments;  tlie 
first  segment  in  large  part  obscure  yellow.  The  black  of  the  second 
and  third  segments  oi)aque,  fourth  segment  wholly  shining  greenish- 
black  ;  pile  orange  or  yellow;  the  female  with  less,  nearly  bare,  except 
on  the  second  segment.  Venter  light  yellow  on  basal  p(»rtion.  Legs  in 
large  i)art  brownish  yellow  ;  femora  black,  a  ring  on  the  tibiai,and  the 
l)osterior  metatarsi  brown.  Wings  with  a  strong  yellowish  or  brownisli 
tinge. 

Numerous  specimens  ;  Xew  England,  Indiana  (Coquillett),  Kentucky. 


r'fl 


EUGENIAMYIA.* 


Eugeniami/ia  WilliHtou,  (Jauadii  Kntoinologint,  xiv,  80,  1882 ;  Proo.  Am.  Phil. 
Soc,  XX,  309. 

S  .  Rather  large,  «lark  ferruginous  red  species,  nearly  bare,  witli 
short  hairs.  Head  narrower  than  the  thorax.  Eyes  bare,  contiguous. 
AntenniB  situated  below  the  middle  of  the  eyes  in  profile,  short,  third 
Joint  short  and  (piadrate;  arista  basal,  plumose.  Posterior  orbits  swol- 
Um.  Face  much  produced  downwards  and  forwards,  somewhat  conieal, 
truncate,  with  an  obtuse,  ])rominent  tubercle  in  the  middle.  Thorax 
longer  than  broad ;  in  front  and  above  the  root  of  the  wings,  the  ])()st 
alar  (tallosities,  and  on  the  border  of  the  scutellnm,  with  strong  biistle.'«. 
Abdomen  elongate,  nearly  twici^  the  length  of  the  thorax,  of  nearly 
e(pial  width  throughout,  narrower  than  the  thorax.  Femora  all  swollen. 
and  with  short  bristles  below,  hind  femora  more  swollen  and  elongate, 
and  the  spurs  stouter,  tibia'  with  a  circlet  of  short  s]>ines  at  the  tip,  the 
hin<l  i)air  with  slxu't  spines  scattered  irregularly  over  their  outer  snrl'aee, 
Wings  as  in  Brachyopa,  tin'  first  posterior  cell  long  jtetiolate.  Type  of 
genus  F-.ferruginea  Fallen,  Europe  and  North  America. 

*  EvyivEia,  goodness  of  its  kind,  and  fivia,  fly. 


»l 


i'(!     i 


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SYNOPSIS    OF   NORTH    AMERICAN   SYRPHID^. 


131 


Bugeniamyia  femiginea.    (Plate  V,  fijjs.  4,  4«,  46.) 

llh\n(jia  ferrugini'a  Fallen,  Dipt.  Sncsc.  Syrph.,  34,  3  (1816). 
Ilnirlijiopaferrii'ihH'a  Meij^en,  8yMt.  Be.schr.,  ii,  2(Y.\,  4  ;  Zettorstedt,  Dipt.  Scand., 

ii,  (iH(),  and  viii,  'M:i't,  1 ;  Scliiner,  Verb.  Zool.  Bot.  OesfillHcb.,  vii,  :176 ;  id.» 

Fauna  Aiist.,  i,  :W() ;  Csten  Sackcn,  Cat.  Dipt.,  I'.'H. 
EiKjcn'iamnia  nifa  WilliHton,  Can.  Eutniii.,  xiv,  80. 

Uabltat. — Wasliinjjjton  Territory,  Miinitoba  !,  Northern  Europt'. 

(J.  Length,  14""",  of  wings  10""".  Dark  ferruginous-red.  Head  and 
autt'iinie  sliining  yelU)\vi.sh-ri'd,  arista  blaek,  red  at  base.  Face  on  the 
sides  with  a  stripe  of  silvery  pollen,  not  very  eonspicuous.  Dorsum 
of  thorax  darker,  almost  brownish-red,  with  two  rather  broad  jtollino.se 
st:'ii)es^  abbreviated  behind,  and  inclosiUj.,'  in  front  a  blaek  spot  not 
lendiing  the  suture  ;  clothed  with  rather  abundant  short  black  hairs, 
aiul  the  bristles  of  the  same  color.  Pleura^  with  sparse  yellowi.sh  pile; 
mt'taiiotnm  blackish  behind.  Abdomen  narrower  than  tlie  thorax  and 
mticli  loii.ger,  nearly  bare,  shining,  somewhat  brownish  near  the  end. 
Basal  joints  of  tarsi  yellowish,  the  last  one  or  two  joints  brownish  ; 
ft'inora  below  near  the  base,  especially  on  the  middle  pair,  with  tufts  of 
yellow  pile;  the  short  bhud;  bristles  of  the  femora  more  abundant  on 
till' iiiMh'r  sides  atul  near  the  oiuls,  also  on  the  outer  sides  of  the  ])osterior 
tibi;t.  Wings  brownish  in  front,  lighter  behind,  base  of  marginal  cell,  as 
tiir  as  tip  of  the  auxiliary  vein,  with  a  hyaline  streak. 

One  specimen. 

Tliis  si)ecies  is  recorded  by  Loew  from  Manitoba  (vide  O.  Sacken's 
Ciitalogue.  J).  128),  and,  upon  further  study,  I  am  convinced  that  the 
species  which  1  described  as  E.  rufa  must  be  the  same. 

An  examination  of  the  specimen  identified  as  this  species  in  the  Loew 
type  collection,  since  the  foregoing  was  written,  confirms  this  determin- 
ation. 


BRACHYOPA.* 


U  11.1 


iC 


lirachiiopa  Meijj;en,  Syst.  Besclir.,  iii,  2G0,  18'2'2. 

Krochila  Roudani,  Atti  d.  Soc.  Ital.  d.  Sc.  Nat.,  xi,  186S. 

Modeiately  large,  nearly  bare  species,  of  prevailing  reddish-yellow, 
soinctinies  brownish  color.  FTead  somewhat  narrower  than  the  thorax. 
Aiiteinue  short,  third  joint  round  or  oval  ;  arista  basal,  bare  or  pubes- 
cent. Face  concave,  without  tubercle,  subcarinate,  i)roduced  down- 
wards and  forwards  considerably  below  th<'  eyes,  truncate  at  tij). 
Eyes  bare,  contiguous  :n  the  male,  IVont  in  female  nairowed  above,  the 
ilistaiice  from  vertex  to  antenna^,  greatei'  than  thence  to  oral  M-argin. 
Thorax  narrowed  in  front.  Scutellum  large.  Abdomen  considerably 
lu'oader  than  the  thorax  and  scarcely  longer,  broadly  oval.  Legs  sim- 
lile,  rather  strong,  the  hind  femora  somewhat  elongate,  and  some  times 
ffitli  short  bristly  hairs  below.     '.Vings  luuch  longer  than  the  abdomen; 


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132    BULLETIN  3],  UNITED  STATES  NATIONAL  MUSEUM. 

third  longitndinal  vein  straight,  anterior  cross-vein  before  the  laiddJeof 
the  disctil  cell.  Types  of  genus,  B.  conica  (Panzer)  andB.  6  icoior  (Fallen), 
Eurojie. 

TABLE  OF  SPECIES. 

1. — AriHtabarc 2 

Arista  ])uli<'scoiit  (ErochUa) notaU 

2. — Face  ami  front  ])r()\viiihli,  covoit'd  with  {grayish  pollen  ;  abdomen  mostly 

brown vacua 

Face  rcddisli-yellow,  Hhining  except  a  poUiuoseband  below  theantennie  ; 
front  of  female  on  ui)i)('r  two-thirds  blackish.  Abdomen  reddish- 
yellow    with  slender  brown  iucinures media 

Brachyopa  notata.     (I'late  V,  fijr^t.  "),().) 

Jiriichnojxi  iiolata  O.sten  Sacken,  Bull.  Bull'.  8oc.  ]\at.  Sci.  iii,  fi8 ;  Cat.  Dipt., 
•i4H:  Williston,  l'ro<\  Am.  Phil.  Soc,  xx,  308.  * 

JInhllai. — White  Mountains,  ^Mount  Hood,  Washington  Territory  ! 

5,9.  Length,  0"'™.  Head  liizht  yellow,  with  faint  silvery  i)ollen,  and. 
on  tlie  front,  with  very  short  white  pile.  Antennae  a  little  more  red- 
dish, the  arista  reddish-brown,  with  rather  long  pubescence.  On  tbe 
cheeks  in  front  a  faint  brownish  stripe  running  from  the  eye.  Thorax 
ochruceous,  with  short  dusky  pile;  in  the  middle  above  a  slender,  and 
on  eacli  side  a  broa<l,  whitish  dusted  stvipe.  Scutellum  reddish-yellow, 
nearly  as  long  as  broad,  triangular  in  outliiu',  with  the  apex  rounded; 
the  pile  black.  Ai)domen  browni.sh-yellow,  the  .segments  with  narrow, 
but  distinct,  dark  brown  posterior  borders,  and,  in  the  middle,  witli  u 
slender  brown  stripe,  more  or  less  interrupted  before  each  transveisii 
fas(;ia,  sometimes  only  showing  a  brown  spot  on  each  segment,  want- 
ing on  the  fourth.  Legs  reddish  yellow  ;  the  base  and  tip  of  the  hind 
tibiie,  and  the  hind  tarsi,  reddish,  on  the  latter  more  or  less  brownish, 
Wings  somewhat  tinged  with  brownish-yellow,  distinctly  brownish  at 
the  tip  and  along  the  last  section  of  the  fourth  vein  and  the  i)ostenoi' 
crossvt'in  ;  stigma  brownish,  posterior  cross-vein  only  a  liitle  lougi;i' 
than  the  penultinnite  section  of  the  fourth  vein,  the  including  angk' 
nea rly  rectangular. 

Two  female  si)ecimens  from  Mount  Washington,  X.  H.  (Dr.  George 
Dimmock,  No.  1490),  and  two  from  Mount  Hood,  Oregon,  and  Wash 
iugton  Territory,  both  males.  The  latter  two  specimens  show  no  dif- 
ferences whatever,  that  1  can  see,  except  that  the  color  is  Ji  little  darker. 
The  last  two  joints  of  the  four  front  tarsi  in  all  are  browu. 

Brachyopa  media.     (Plate  V,  fig.  7.) 

Brach\jopa  media  Williston,  Proc.  Amer.  Phil.  .Sue,  xx,  ;108. 

Habitat. — Kern  County,  California! 

$.  Length,  0  to  7""".  Face  and  lower  third  of  front  reddish-yellow, 
shining,  except  across  below  the  antennai,  where  there  is  a  band  ofsil- 
very  pollen  ;  cheeks  with  an  oblique,  slender,  brownish  strii)e.  An  ten 
nro   reddish-yellow,  third  joint  large;    arista  yellowish-brown,  bare. 


? 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


133 


Front  divergent  on  the  sides  below,  on  the  ujjper  two-thirds  black,  cov- 
ered with  whitish  pollen.  Thorax  black,  thickly  covered  with  whitish 
pollen,  in  the  middle  in  front  with  two  black  linear  stripes ;  hnmeri, 
post-aliir  callosities,  and  the  scutelluin,  yellowish-red,  the  last  ronnded, 
niucli  broader  than  long.  Pleurae  dark,  thickly  whitish  dusted,  a  black 
,si)ot  nbove  the  middle  and  'lind  coxae.  Abdomen  reddish-yellow,  with 
ulciider  brownish  hind  borders  on  the  second,  third,  and  fourth  seg- 
ments. Legs  brownish-yellow,  the  last  two  Joints  of  all  the  tarsi  black- 
ish :  liind  tibiae,  and  basal  joints  of  hind  tarsi,  brownish.  Wings  nearly 
hyaline,  faintly  clouded  at  the  tip;  stigma  yellowish;  posterior  cross- 
vein  not  much  longer  than  tln^  penultimate  section  of  the  fourth  vein, 
the  included  angle  obtuse. 

One  specimen  (H.  K.  Morrison).  This  species  is  allied  to  B.  bicolor 
of  Europe,  but  diflers  from  a  single  specimen  1  have  for  comparison,  us 
well  as  the  description,  in  the  front  being  broader  below,  and  black 
above,  in  the  tarsi,  etc. 

Bracbyopa  vacua. 

Brachyopa  vacua  Osteu  Sackeu,  Bull.  Buff.  Soc.  Nat.  Sci.  iii,  Cd  (by  typograph- 
ical error  racua);  id.,  Cat.  Dipt.,  247;    Williston,  Proc.  Aui.  Phil.  Soc,  xx, 

Bruchijopa  cinereo-viltata  Bigot,  Aunales  Soc.  Eut.  de  France,  lei84,  .^37. 

Habitat. — Canada,  California ! 

•'  9 .  Length,  8  to  9""".  Brownish-graj',  thorax  with  three  brown 
stripes;  abdomen  brown,  its  basal  third  whitish-yellow,  with  a  brown 
line  in  the  middle  ;  arista  bare. 

Face,  front  and  vertex,  densely  clothed  with  a  grayish  pollen ;  lower 
part  of  the  face  very  much  projecting ;  a  brownish  stripe  runs  across 
tlie  cheeks  from  the  eye  to  the  mouth;  antennae  brownish,  grayish 
pollinose,  arista  bare,  brownish-reddish  at  base.  Thoracic  dorsitm  yel- 
lowish-gray, with  three  brown  stripes,  the  intermediate  one  gennnate 
and  abbreviate  posteriorly.  Scutellum  brownish-yellow.  Abdomen 
brown,  shining;  first  and  second  segments  whitish-yellow  (as  if  trans- 
luc(Mit),  the  second  brown  posteriorly  and  with  a  longitudin:il  brown 
line  in  the  middle.  Legs  grayish-brown,  hind  femora  slightly  incrassate, 
oil  tlie  under  side  with  a  brush  of  short,  spine-like  bristles.  Wings 
(li.stinctly  tinged  with  brownish,  especially  on  the  distal  half,  anteriorly ; 
flnst  posterior  cell  distinctly  petiolate  at  the  distal  end,  the  petiole  being 
equal  in  length  to  the  small  cross-vein. 

"■Habitat. — Quebec,  Canada  (Mr.  F.  X.  Belanger),  a  single  male  spec- 
imen. The  interval  between  the  distal  ends  of  first  posterior  and  discal 
cell.^i  is  a  shallow  sinus,  and  not  a  right  angle  as  in  B.  notata." — Osten 
Sacken,  1.  c. 

A  single  female  specimen  from  Kern  County,  California,  1  have 
sc.ircely  a  doubt  belongs  here ;  the  differences  from  the  description  are 
very  vslight.  The  color  throughout  is  apparently  a  little  darker,  and 
the  legs  are  rather  reddish  than  grayish  brown.    1  do  not  see  that  the 


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134  BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 

lower  part  of  the  face  projects  wore  than  in  B.  notata.  The  third  joint 
of  the  autenuae  is  diHtiiictly  smaller  tbau  that  of  the  females  of  either 
of  the  preceding  species. 


VOLUCELLA.* 

Voliicella  Gi'otfroy,  Hist,  des  InsectH  de  Environs  do  Puris,  vii,  1764. 
Ceno«;a«^T  Dumeril,  ExpoHiticm,  etc.,  1801,  and  Diet.  d'Hist.  Natur.  Strasburg, 

1817. 
Temnocera  St.  Far^oau  and  Servillo,  Eucycl.  Metb.,  x,  78*5,  1825;  Macquart, 

Dipt.  Exot..  ii,  2,  2(). 
Ornidia  St.  Farj;i'au  and  ScrvilU-,  Encycl.  Moth.,  x,  78(),  182.'>. 
Atvmtioccra  Itij^ot,  IJullot.  hi-muns.  Soc.  Ent.  France,  Ni>.  12,  1H82. 

Mediniii  to  larjje  size,  robust,  .soinetiinos  thickly  pilos^  black,  metal 
lie  bine,  browni.sh-yellow  with  darker  abdominal  fasciae,  or  nearly 
wholly  yellowi.sh  spt-cios.  Head  somewhat  broader  than  the  tliorax, 
tlu'  posterior  orbits  narrow.  Antenna;  comparatively  small,  first  two 
joints  short,  of  nearly  equal  lenfrth,  third  joint  elongate,  sometiiiii's 
slender,  often  narrowed  in  its  middle  or  toward  the  end;  arista idumose, 
sometimes  witli  long  and  abundant  ])ile,  at  other  times  shorter,  spa r.sci. 
Face  more  or  less  excavated  below  the  antenna',  with  a  lu-ominence  be- 
low the  middle,  at  other  times  straight  or  convex  in  i)roflle,  the  epistoiii;i 
considerably  produced  downwards  and  .somewhat  forwards,  conical, 
pointed  at  the  tip,  with  a  small  notch.  Eyes  i)ilose,  sometimes  baie  in 
the  female,  contiauous  above  in  the  male.  Thorax  sometimes  with 
yellow  lateral  stripes,  sometimes  densely  ])ilo.se.  Scutellum  large,  often 
tran.slucent,  sometinu'S  with  hairs  or  distinct  bristles  on  its  border. 
Abdomen  oval,  strongly  arched,  not  very  much  longer  than  the  thorax. 
Legs  simple,  moderately  strong,  all  the  femora  of  nearly  equal  length. 
Wings  large  and  broad,  marginal  cell  closed,  anterior  cross-vein  usually 
towards  the  base  of  the  discal  cell  and  rectangular,  sometimes  near  the 
middle  and  oblique.  Third  longitudinal  vein  not  bent  into  the  first 
posterior  cell,  fourth  vein  bent  inwards  at  the  end,  the  third  vein  beyond 
the  union  directed  obliquely  forward;  calyptrse  large. 

The  face  in  the  female  frequently  differs  in  profile  somewhat  from  that 
of  the  male,  the  depression  below  the  antennse  being  a  little  great«n, 
and  the  lower  part  of  the  face  more  receding;  the  third  joint  of  the 
antenna;,  also,  is  sometimes  more  expanded,  especially  at  the  base. 

i'ontrary  to  the  opiiion  of  some  excellent  dipterologists  I  have  re- 
jected the  genus  Tewnocera,  for  the  following  reasons:  In  several  of 
the  species  of  our  fauna,  bristles  or  bristly  hairs  exist  on  the  scutellinii 
and  post-alar  callos  ities.  In  some  of  these,  to  separate  them  generically 
would  be  absurd,  for  the  conformation  and  coloration  throughout  are 
strikingly  similar  to  tbose  of  others  without.  Moreover,  the  bristles 
in  some  are  so  flue  that  they  are  with  difficulty  distinguished.    Hence 


•Diiniuiitive  from    voluctr,  swift. 


,i      ! 


SYNOPSIS   OF   NORTH   AMERICAN    SYRPHIDiE. 


135 


I  think  tliat  this  character  is  of  but  little  value  to  distinguish  our  spe- 
cies. The  otlier  character  used  for  this  genus  is  of  less  value  still:  I 
mean  the  excision  of  the  third  joint  of  the  anteuniB  above,  as  such  ex- 
cision in  a  less  degree  is  found  in  most  of  the  Volucelhe.  Mr.  IJigot  has 
established  tlie  genus  Ateinnocera  on  the  presence  of  bristles  on  the 
scuteliiun  alone,  the  third  Joint  of  the  antennaj  not  being  excised  above. 
If  the  suiall  diUerence  that  is  thus  left  as  the  sole  character  for  Temno- 
vera  were  made  a  (niterion  by  which  to  base  other  genera  in  this  family, 
how  many  would  there  be  ? 

TAHLE  OF  SPECIES. 

1.— Thorax  and  abdomen  very  thickly  furry,  more  or  less  yollowish,  piloai'.  Face 
iiiiK'li  excavated  below  the  anteuiuf  ;  arista  very  loii}^  and  densely  idiimose  : 
second  sefjnient  of  the  abdomen  yellow  on  the  sides;  wings  with  a  dark 

brown  spot;  large  species 2 

Thorax  and  abdomen   not  thickly  jiilose 3 

2.— l''a<'e  black  or  chestnut  ;  yellow  pilose;  dorsum  of  thorax  and  ;)lenrii'  wholly  yel- 
low ])ilose evecta 

race  yellow  ;  thickly  yellow  ])ilose  ;  ch(!eks  black  ;  dorsum  of  thorax  and  i»leur;i> 

black  pilose facialis 

3.— I'eep  l)lack,green,  violet,  or copi)ery  colored  species;  cheeks  not  light  colored  .  4 
I'levailing  color  light ;     cheeks  yellowish,  wholly  so  or  with  a  black  strijie  .      9 
4.— iSitse  of  wings  yellow  ;  face  light  yellow,  with  yellow  pile;  sides  of  thorax  and 
the  scutellum  reddish  or  yellowish  ;  basal  two-thirds  of  tibiie  reddish  yel- 
low       vesiculosa,  eugenia. 

liaso  of  wings  not  yellow  but  li.\alin<!  or  brown 5 

5,— Wings  hyaline,  except  a  spot  at  end  of  auxiliary  vein  and  on  the  cross-veins  ; 

body  wholly  deep  colored  except,  sometimes,  the  head 6 

Wings  more  or  less  dark  brown  on  the  basal  part  in  front 8 

6.— Face  nnicli  produced  downward  into  an  acute  cone  ;  third  joint  of  antennte  elon- 
gate as  usual 7 

Face  obtuse  below,  not  produced  downward,  in  the  middle  with  an  obtuse  tuber- 

<le  ;  third  joint  of  antenna}  very  short,  triangular obesa 

7.— Face  and  front  wholly  black Comstocki 

Face  and  front,  except  the  checdis,  deep  reddish-yellow victoria 

8.— Wings  broadly  deep  brown  at  the  base,  ending  abruptly  near  the  tip  of  auxiliary, 

and  thence  yellowish  along  the  coBta;  abdomen  clothed  chiefly  with  short 

erect  hairs  ;  fa<'e  considerably  excavated  below  the  antonnsr  .     mezicana 

Wings  brown  in  the  costal  and  subcostal  cells;  face  more  or  less  red,  lightly 

excavated  below  the  antennie aniia 

9.— 'I'liiril  joint  of   antenniB  deeply  excised  above;  face  produced  forwards  below 

Hagii 
Third  joint  of  antennio  not,  or  but  little, excised  above;  face  produced  down- 
ward, as  usual 10 

10.— Large  si)ecies  (ll'""'+) 11 

Smaller  species 13 

11.— Face  and  cheeks  wholly  yellow megacepbala 

Face  and  cheeks  not  wholly  yellow 12 

12.— Cheeks  lilack,  shining  ;  black  of  the  abdominal  segments  prolonged  in  the  mid- 
dle anteriorly  (11-12™'")    avida 

Cheeks  yellow  with  a  rather  narrow  brown  or  black  stripe ;  black  of  the  abdomi- 
nal segments  less  distinct  in  the  middle isabelliua 


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13.— Second  vein  near  tlio  tip  n'j;iilar,  i.  e.,  iw  luit  hont  into  th«)  Hiilimargiiml  coll; 
fncf  1111(1  clicckH  witlidut  black  MtripoH;  win^M  liyaiine,  with  a  faint  brown 

Hpol  at  the  ti|>  of  (lio  auxiliary  vein 14 

Second  vein  irroKiilar  near  tliu  i>n<l,  h<>nt  into  the  Hiibniarginal  cell  •    •    .     .  IS 
14. — AbdornoTi   reHjiltMidcnt  coppery   blue,    tlu!  banc  yellow   or  trauBlncont, 

vesiciiloBa 
Abdomen  nioHtiy  yellow,  browniuh  toward  the  tip,  witli  three  pairHof  HUiall  (piail- 

ran^^nliir  spotH  on  the  Hides aezpunctata 

15. — Face  ytdlow  ;  win^jH  hyaline  with  brown  HpotH 16 

Face  with  a  Idaek  Htripo  ;  win^H  subfasciiate 17 

16. — SpotH  of  wiii;;H  diHtinet  ;  black  abdoniiuiil  fasciii-  obsolete  in  the  middle  .       tau 

.Spots  <>t°  the  win^H  IcNH  conNpicnoiis  ;  black  alidominat  t'a.scitu  eoniplete.     .  satur 

17.— Win^H  distinctly  f'asciate  with  brown;  jtlenrie  with  two  yellow  spots;  ytlldw 

lands  of  abdomen  interrupted pusilla 

Win^H  less  distinctly  faseiate;  ))lenrio  with  tivo  or  six  yellow  spots;   yellow 

alidoniinal  bands  entire fasciata 

For  other  species  see  descriptions. 

Volucella  evecta.     (I'late  VI,  lii^s  (!,()«.) 

I Dhi'clla  evvi'ia  Walker,  Dipt.  Saunders.,  ii.")l. 

yolucflUi  plumata  Mac(iuart  (noii  Fabr.),  Dipt.  Exot.,  4e  Suppl.,  I'Jl. 

Habitat. — Mew  Entilaiid,  Mi(l<ile  Stiite.s,  Britisli  Possessions! 

3,2.  Len^'tli,  1-  to  ];")""".  Face  black,  or  pitcliy  black,  clothed  with 
moderately  abundant  yellow  pile  on  the  lower  two-thirds,  (!onsideial)ly 
excavated  below  the  anteniiiu  antl  with  a  distinct  broad  protuberaiai' 
near  the  nii<ldle;  in  tiie  male  pnKluced  directly  downwards;  in  the 
female  more  rounded  on  the  lower  part  smd  projectin},'  rather  more  for 
ward.  Third  Joint  ofantenme  a  little  broader  at  the  base,  reddish -yel- 
low or  icddisii-brown,  black  at  the  l»ase;  arista  more  than  twice  tho 
length  of  the  iinteiune ;  lon;jf  and  abundantly  feathery  plui:iose  with 
delicate  pile.  Front  in  fennile  rather  narrow,  (dothed  with  yellow  pile; 
yellowish  on  the  sitles,  with  a  blackish  median  strij)e;  frontal  triaii;;le 
in  the  male  small.  Eyes  bare  in  female,  or  at  most  only  spar.sely  pilo.se 
near  tin;  toi),  thickly  jdlose  in  male.  Thorax  black,  shinino-,  very  id)uii(l- 
antly  liji'ht  yellow  pilose  on  the  sides  of  the  dorsum  ;  i>h'urie  and  sciitel- 
luni  less  abundantly  i)ilose  in  th<'  mi<ldle,  where  the  ground  color  shiiii'S 
through.  Scntelluin  lightyellow.  Abdomen  black, shining;  on  the  .sides 
of  the  second  .segment  with  a  large  triangular  yellow  sjiot;  thickly  cov- 
ered with  yellow  pile,  which  is  less  abundant  in  the  middle  of  the  sej;- 
ment;  elsewhere  the  abdomen  is  thickly  covered  with  erect  black  pile, 
except  rarely  in  some  specimens  (var.  mnffttmea,  new)  the  posterior  ]»oi- 
tion  of  the  third  and  the  remaining  segments  is  clothed  with  longer, 
erect,  bright  red  or  yellow  pile.  Lt^gs  black;  the  tip  of  the  femora 
and  basal  and  termintil  i>ortions  of  the  tibiic,  and  till  the  tarsi,  reddish. 
Wings  brownish-hyaline,  cloude<l  along  the  veins ;  a  large  spot  oppo.site 
the  tip  of  ituxiliary  reaching  to  the  fourth  Vcin.  Anterior  cross-vein 
nearly  rectangular,  situiited  near  the  proximal  third  of  the  discal  cell. 

Fifty  specimens. 

This  species  is  related  closely  to  F.  bombylans  of  Europe,  the  variety 


SYNOPSIS    OF    NORTH    AMERICAN    SYRrillD/E. 


137 


giiiKjiiiucii  coiwspoiKliiig  to  var.  haemorrhoidalu.  The  speciea, however, 
t^hows  11  stnutunil  dill'erenco  in  the  I'ucial  profile,  the  excavation  being 
]( ss  below  the  anteimffi. 

Volucella  facialis. 

I  olitcclla/iiciiiliH  WilliHton,  Proc.  Am.  Phil.  Boo.,zx,  3IG. 

lldhitnt. — ('alifornla! 

<J ,  5  .  Lenj,'th,  14  to  lo""".  In  stnietnre  piecisely  like  the  prerodiug 
1111(1  concsiioiKliii};  in  nmrkinffHto  V.bflinl)ylann,\nv.  plumataiA'  Europe. 
Tliiit  it  may  only  1m'  a  variety  iA' e recta  1  am  not  prepared  to  deny,  cer- 
tainly fjrt^nter  diU'eienees  exist  ainong  th<^  varieties  of  V.  botuhylans. 

Face  broadly  yellow  in  the  middle,  and  thickly  clothed  with  yellow 
pile;  the  eyes  of  the  leinale  more  pilose,  the  dorsum  of  the  thora.v  and 
tilt' plenra) black  i)ilose,oth«'rwise  not  dill'erinj^  from  V.evecta  namjninea. 

Volucella  eaurieiis  mezicana.    (Pluto  VI,  D^h.  o,  5a.) 

Si/riilius  eHiiriviiH  FubriiiuH,  Systeui  Eiitom.,  iv,  <?H1,  10;  Syst.  Antl.,  2.H>,  9. 
I'olucella  cmiritiiH  WitMU'iiiaun,  Aiihh.  Z \v.  Iiim.,  ii,  197,  4 ;  Sdiiiier,  Novara  Expert., 

ii,  1,  15.  Dipt.,  :i.")t),  54. 
Vohicella  mexicaiia  Maciiiiart,  Dipt.  Exot.,  ii,  2,  iJ.'j;  tali.  r>,  lijf.  3;  .Sdiinor,  I.  o., 

.">;");  Ontvn  Siicivt'ii.  Wi'Ht.  Dipt.,  Xi2. 
I'olitcella  (linjiur  Muciiuart,  Dipt.  Exoi.  Ivv  Suppl.,  123;  tab.  xi,  tig.  '.i;  ScLiner, 

I.e. 
I'olucella  mctallifera  Wiilki'T,  List,  istc,  iii,  (J3C. 
Toliuella  MaximiUnni  .Jat;iinick»!,  Neiie  Exot.  Dipt.,  87  ;  Schiiiir,  I.  c. 

Hahitdf. — California,  Arizona,  Florida !,  Mexico  (Macq.), New  Granada 
(.MiU'(|.). 

<J  ,  9  .  Length,  10  to  1{(""".  Face  deep  chestnut-black,  moderately  shin- 
ing, considerably  excavated  below  the  antennro,  with  a  rounded  ]>ro- 
tiibcrance  near  the  middle,  below  tiiis  perceptibly  concave,  produced 
(lirec'tly  downward  into  aconical  tij),  slightly  notched  at  the  extremity; 
(;l()thed  with  short  white  pile ;  cheeks  shining  black.  Antennte  vary- 
ing from  ii  dark  reddish  to  a  quite  black,  or  sometimes  thti  tip  oidy  red- 
dish ;  third  joint  rather  short,  ex[>antled  at  the  base ;  arista  moderately 
])hiiiut.se.  on  the  ui)per  side  longer  than  below.  Front  in  female  narrow 
ubovc,  gently  convex,  with  yellowish  pile,  more  black  at  the  vertex  or 
.sdiiietiiues  the  pile  may  be  wholly  blackish  ;  on  each  side  there  is  a  well 
marked  concentric  groove.  Eyes  in  both  sexes  obscurely  yellowish 
])il(ise.  Thorax  deep  blui.sh-black,  sometimes  with  u  slight  coppery 
lu.ster ;  clothed  with  black  ])ile,  at  times  ob.scuiely  yellowisli  in  front. 
Sciitellnm  deep  chestnut-black.  Abdomen  a  deep  resplendent  violet 
or  purplish,  sometimes  with  a  coppery  luster,  clothed  with  short  stiff 
bristle  like  hairs  and  on  the  last  two  segments  with  black  pile.  Legs 
black,  with  black  i)ile.  Wings  hyaline  ;  on  the  basal  portion  to  a  little 
beyond  the  tip  of  the  auxiliary  vein,  brownish  black;  the  end  is  cut  off 
squarely  and,  beyond,  the  subcostal  cell  is  saturate  yellow,  extending 
somewhat  outwards;  the  dark  color  extemls  backward  to  beyond  the 


'  1^ 


»' 


\, 


138 


BULLETIN   31,    UNITED   8TATE8    NATIONAL    MUSEUM. 


n 


i  ,. 


X\ 


J I " 


i 


\ 


)■■ 


fourth  voiii,  cloudiii;,'  tliu  crosHVciuM;  the  outor  imrt  of  the  first  Vfin 
ttud  tlie  tip  of  the  jiuxiliary  iire  yeUow 

8chiiier  (/.  a.)  (ioinpiireil  the  type  of  ,)faxiiniHani  .Isieii.,  and  asserteil 
it  to  be  the  siiiiie  as  mi;r!cana,  and,  moreover,  that  hoth  this  and  (Unpar 
Macq.  wen^  varieties  of  f'«Mr*V;w  Kal».  Strueturaily  tlH\v  are  all  aliice. 
hut  the  color  in  fsnriens  is  more,  l>ro\vnish.  I  have  examined  a  large 
number  of  speitimen.s  from  California  (()(((|uillett),  Arizona  (('omst(M'k), 
Texas,  and  Klori<la  (Itiley),  and  find  tliein  all  quite  uniform  in  colora 
tion.  iienee  it  seems  to  be  ailvisable  to  retain  the  varietal  name. 

Volucella  ComBtockl,  ti.N|i.     (I'latf  VI,  liy.  'J.) 

lldhifnt. — Arizona,  New  Mexieo! 

(J ,  9  .  Lenjifth,  I'J""".  Face  nearly  perpen<li(!ular  in  profile,  scarcely  at 
all  excavated  below  the  antennie,  shininj;  bluish  black,  with  lon<;,  ratiicr 
abundant,  bhuik  pile;  fr(>'tt  like  the  face,  with  blaiik  pile,  sides  iicailv 
))arall('I;  frontal  triaii}j;le  prominent,  with  l(tn;'-er  black  pile.  AntciiiKi' 
brownish-black,  the  third  Joint  in  the  male  only  a  little  narrowed  lie- 
yond  the  middle,  the  basal  portion  strarcely  half  as  wide  ajjain,  in  ilir 
female  twice  as  wide  as  on  its  narrowest  part;  arista  but  littU'  loiijitr 
than  the  Joint,  loosely  plumose.  Eyes  thickly  pilose.  Thorax  d('t|i 
shininjt'  blackish  blue,  with  ratlu'r  abuiulant,  moderately  lon^,  black 
l)ile.  Scutellum  deep  chestnut  on  its  disk,  with  black  pile.  Abdoiiit'ii 
brilliant  dark  blue,  with  short  black  i)ile,  louf^er  on  the  terminal  si-ii- 
nients.  Lej^s  bhu^k,  black  pilose.  Winj^s  hyaline  with  a  small  brown 
spot  at  the  tij*  of  the  auxiliary  vein,  faintly  clouded  on  the  outer  pint 
and  posterior  border. 

Two  specimens  from  Arizona  (Professor  Comstoek),  and  one  from 
iNew  Mexico  (G.  F.  (raumer). 

Volucolla  Anna,  11.  sp.     (Plate  VI,  iig.  H.) 

Habitat. — Arizona ! 

$  .  Length,  14""".  Face  chestnut-colored,  shining  bluish  black  on  its 
lower  part  and  on  the  cheeks,  below  the  antennae  faintlj'  dusted  with 
white;  sub-antennal  excavation  slight,  the  convexity  of  the  middle  not 
prominent,  but  greater  than  in  V.  ComstocJd.  Antenuie  red,  third  Joint 
moderately  expanded  near  the  base.  Eyes  pilose  with  rather  short  ]>ile. 
Tlxu-ax  deep  shining  bluish-black,  with  black  i)ile.  Scutellum  chestnut- 
colored  on  its  upper  surface,  with  black  pile  and  a  row  of  black  bristly 
hairs  on  its  border.  Abdomen  deep  blue,  with  a  coppery  refiection, 
clotli'Ml  with  short  black  pile,  longer  on  the  posterior  segments.  Legs 
black.  Wings  hyaline,  costal  and  subcostal  cells  brown,  nearly  black 
at  the  base;  a  small  blackish  spot  at  the  tip  of  the  auxiliary  vein,  a 
narrow  brown  cloud  on  the  furcation  of  the  second  and  third  ^^eins,  the 
anterior  cross-vein  and  cross-veins  at  base  of  discal  and  posterior 
cells. 

One  specimen. 


SYNOPSIS    OF   NORTH    AMEKICAN    SYUPIIIDiE. 


139 


Volucella  eugenla,  u.  Mp.     (I'latc  VI,  (Ik.  10.) 

Ilahitat. —  IJaliaiiiiis,  Florida ! 

5 .  lA'iifc'th,  14""".  Front  and  facto  lij^'lit  .yellow ,  clotht'd  with  lifflit 
vt'Ilow  pile;  i-lu'oks  deep  .sliiniiijf  black.  Fa(!«'  coiisith'rably  excavated 
itcldw  the  aiiteiiiiiu,  and  with  a  rather  lar;;e  protuberaniH^  near  the  mid- 
dle, iniich  produ(;ed  directly  downwani  to  a  very  aeiiti'  tip.  Anteniiie 
yellow,  third. joint  a  little  liroadeiied  at  the  distal  end,  inneh  excised  on 
irs  upper  border  near  the  middle;  arista  a  little  lo-i;;er  than  the  joint, 
model utely  pilose.  Eyes  pilo.se.  Dorsnm  of  thoi'ax  olivejjreenish- 
liliiek,  somewhat  chestnut  or  even  yellowish  on  the  sides;  (rlothed  with 
siioit.  ratli.M"  sparse,  pile,  in  term  in<,ded  with  yellowish  on  the  humeri; 
;il(»iij,'  the  dorsoplenral  suture  with  short  bristles,  lonj^er  and  more 
iiliiiiHlant  on  tlu  ^tost-alar  (lallosities.  Scntellnm  black  at  the  base,  be- 
coininj;'  reddish  on  its  border,  yellowish  below;  alon;;'  the  bordiT  theie 
is  11  row  of  l)lack  bristh's.  Abcionien  brilliant  violet,  clothed  with  abun- 
dant, short  black  pile.  Lej-s  black;  all  the  tibia',  except  the  terminal 
fourtli  or  third  on  the  hind  pair,  yellowish  red.  Win;4s  hyalitu',  cross- 
veins  narrowly  clouded  with  brown,  tlio  auxiliary  vein  and  nearly  all 
tiie  lirst,  the  second,  third,  and  fourth  to  near  the  crossvi'ins,  conspicu- 
(lusly  yellowish,  the  interveninj^'  (M'IIs  tinned  with  the  sanu'  color. 

Two  spfcini'n.s.  Is  nearest  allied  to  1'.  ubdominaliN  Wied.,  but  will 
be  (listin^-iiished  by  the  lateral  niar<>ins  of  the  thoracic  dorsum,  ami  the 
seutellnm,  not  beinj^  so  distinctly  yellow;  it  also  lacks  the  large  trian- 
j;iiliu'  u'llow  spot  in  front  of  the  scutellum. 

Volucella  avida.    (VhiW-  VI,  tig.  12.) 

I'oluct'lla  iividd  O.steii  Sackeii,  West.  Dipr.,  X]',l. 

Uubitat. — California ! 

(? ,  9 .  Length,  10  to  12"'"'.  Antenuaj  light  brown;  arista  loosely 
plumose  above;  third  antennal  Joint  about  one-half  or  two-thirds 
of  the  length  of  the  arista,  its  basal  half  a  little  exi)anded;  face  pale 
wliitisliyellow,  a  narrow  black  stripe  runs  from  the  mouth  u|)ward,  be- 
coming paler  and  finally  obsolete  before  reaching  the  autenme ;  cheeks 
blaek,  shining;  frontal  triangle  of  the  male  whitish  yellow,  be.set  with 
black  pile;  profile  straight,  in  the  male  with  a  slight  depression  under 
the  anteinne,  more  receding  on  the  lower  i)art  in  the  female.  Thorax 
greenish-black;  on  each  side  between  the  humerus  and  scutellum  a 
latliei-  broad,  dull,  yellow^  stripe;  in  front  of  the  scutellum  a  yellowish, 
lather  obscure  parallelogram,  niarginate  anteriorly ;  sides  of  the  dorsum 
and  i)leura^  beset  with  yellowish-white  hairs.  Scutellum  yellowish,  sub- 
translucent,  beset  with  black  hairs  along  the  edge.  Abdomen  pale 
lioiiey  yellow;  first  segment  black,  the  second  and  third  segments  pos- 
teriorly with  a  narrow  black  margin,  expanded  on  each  side  along  the 
lateral  margin,  and  prolonged  in  the  middle  in  the  shape  of  a  longitu- 
dinal black  stripe  toward  the  anterior  margin  ;  on  the  second  segment 
tbis  stripe  is  broadly  expanded  so  as  to  coalesce  with  the  black  of  the 


I 


140  BULLETIN    31,    UNiTED    STATES    NATIONAL    MUSEUM. 

first  segment ;  on  the  third  seffnicut,  on  the  eontrary,  it  is  taperiiifj  an- 
teriorly; fourth  segment  with  a  bhick  crossband  a  little  beyond  the 
middle,  with  a  subtriangular  expansion  in  the  middle  reaching  toward 
the  fifth  segment;  tiftli  segment  black  on  the  sides,  iji  the  liiale  the  liy 
jM)])yginm  black;  the  abdomen  is  clothed  with  short  black  i)ile  on  its 
bhu'k  portions  and  with  yellowish  pile  on  the  yellow  regions,  especially 
on  the  sides  of  the  second  segment  and  on  the  posterior  part.     Femora 
black  ;  knees  and  basal  half  of  the  tibia;  brownish-yellow,  tarsi  black, 
Wings  hyaline;  latter  half  of  the  costal  cell  and  the  interval  betwoeii 
the  auxiliary  and  lirst  longitudinal  vein  as  far  as  the  stigma  brownish;  I 
stignni  dark  brown,  central  cross- veins  and  small  cross-veins  with  \vell| 
defined  brown  clouds  ;  the  second  vein  ends  in  the  first  some  little  dis 
tance  before  the  tip  of  the  latter. 
Five  specimens. 

Volucella  isabellina,  n.  Hp. 
Ilahitat. — xVrizona ! 

9.  Length,  15  to  IG"'".  Face  pale  whitish-yellow,  with  a  narrow 
brown  stripe  on  the  lower  two-thirds,  paler  and  obsolete  above;  pileia 
the  middle  black,  on  the  sides  mixed  with  white;  cheeks  with  a  ratlier 
narrow  brownish-black  stripe  running  from  the  eye  to  the  tij) ;  bcliind 
with  a  fringe  of  white  pile.  Front  of  the  sajne  color  as  the  face  with 
side  grooves  and  clothed  with  black  ])ile.  Front  gently  and  eveidy  (;on 
vex;  lace  lightly  concave  below  the  antennie,  receding  on  its  intcrioi 
ImII'.  Antennie  brownish,  or  reddish  ;  rather  short,  the  third  Joint 
somewhat  longer  than  iti  arida,  expanded  on  its  basal  portion.  Tiioras 
greenish-black ;  on  each  side  between  th»'  humerus  and  scutellum  a  rather 
broad  dull  honey -yellow  strii)e ;  in  front  of  the  scutellum  a  yellowisli, 
rather  obscure,  i)arallelogTam ;  the  black  is  thickly  dusted,  leaving  sloii 
d«'r  strii)es  atid  the  narrow  borders  shining  blackish  ;  sides  of  the  dor 
sum  and  the  pleur;e  beset  with  th»  yellowish-white  i)ile  on  the  post-alar 
callosities  mingled  with  black  hair.  Scutellum  yellowish,  subtranslii 
cent,  beset  with  black  pile  on  its  disk  and  edge.  Abdomen  light  vel 
low  ;  first  segment  black,  second  segment  posteriorly  with  a  rather  iiar 
row  black  nii'.rgiu,  obsolete  in  the  middle,  expanded  somewhat  toward 
the  sides,  in  front  with  a  narrow  black  triangle  leaching  to  about  tlit 
middle  of  the  segment ;  chird  ;-egment  with  the  anteiior  margin  li^lii 
yellow,  more  or  less  red  on  the  middh^  part,  a  deep  black  on  the  [tosti 
rior  ])ortion,  which  on  t!ie  sides  reaches  to  near  the  middle  of  the  sog 
ment ;  this  black  bonier  is  a  little  wider  ♦•r.m  that  on  the  [)receding  scj; 
nieiit  and  like  that  interrui)ted,  or  obsoU-te  in  the  middle:  fourth  sw 
ment  with  a  black  sjiot  <  ..  each  side  on  it  p((sterior  margin;  on  the  an 
terior  angles  of  each  segment  tliere  is  light  yidlow  pih',  elsewhere  witt 
short  black  hairs.  Femora  black  at  the  base,  on  the  other  |)art,  and  tbi 
basal  ])orti<ms  of  tl'.e  tibiai  and  tarsi,  bi'ownishyellow ;  terminal  par! 
of  tibia.'  auil  the  last  three  joints  of  all  the  iuvsi,  darkei',  the  latter  blact 


peri  11^^  an- 
pyoml  the 
ig  toward 
lie  the  liy 
pile  on  its 
especiully 
,  F«'inoni 
iirsi  black. 
il  b«'t\v(H'ii 
brownish; 
;  with  well 
3  little  (Us 


I  a  narrow 
ve;  pileia 
tb  a  rather 
i]) ;  bcliind 
}  face  with 
i^'tMily  con 

its  inr»'i'ioi| 
|tliir(l  j()iiit| 
Tlioras 
111  a  rather 
yellowish 
iviiifj'  slcn 
of  tlie  (lor 
('  post-alar 
lUbtraiisii) 

II  li;>lit  yt 
rather  nai 
lat  towanl 

about  tlit^ 
vrfi'iii  li;:lii 

the  post' 
of  tiie  sc|; 
L-ediiij;  ■'•■»'!; 

bintli  sea 

on  the  iui 
vlu'iv  witk 
rt,  and  tbt 
luiiial  iKir! 
atter  blact 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIID^. 


141 


at  the  tip.  Wings  i)ure  hyaline  ;  stiguiayello\vish-bro\Mi ;  the  anterior 
ci'oss-vciii,  furcation  of  second  and  third  lonjiitudinal  veins,  and  veins 
at  base  of  discal  and  last  jiosterior  cells  narrowly  clouded  with  deep 
brown. 

Tills  species  resembles  Y.  avida,  \m^  differs  in  the  jj^reater  size,  in  the 
checks  not  bein.y  wholly  black,  in  the  bhu-k  of  the  abdoiiicu  beiii}/'  obso- 
lete in  the  iiii<ldle,  and  in  the  third  aiitei;!!:;i  joint  beinjf  longer;  the 
lioiit  of  the  female,  also,  is  narrower  above.  The  protile  of  the  face  ill 
the  male  is  inobably  sfraightei'  and  less  receding  in  its  lower  part  thau 
ill  t  lie  female. 

Volucella  vesiculosa.     (Plaits  VI,  li^.  1,  la.) 
^Ni/)7'/("8  niticiiloxiix  Fahricius,  System  Antl.,  22ii,  11. 

Volinrlhi  ret'icidoiin  Wicikiimnii,  Aus.s.  Z\v.  Ins.,  ii,  "iOl,  II;  Miaquarl,  Dipt.  Exot.  3e 
Sui)]il.,  ;'.',>;  t.ili.  iv,  licj.  :>. 

Habitat. — reiinsylvania,  Cvjiinecticut,  Maryland,  Kentucky,  Florida!, 
Smith  America. 

?,9.  Length,  !)  to  10""".  Head  reddish-yellow;  eyes  o*'  male  con- 
tiguous for  a  long  distance,  Ihe  frontal  triangle  very  smali.  Antcnme 
icdilishyi'llow,  tliinl  joint  long,  a  little  broader  at  its  iiase,  but  not 
excised  en  either  border;  arista  about  twice  the  length  of  joint,  long 
|iliunose  above,  short  bebsw  Face  considerably  *'Xcavat(Ml  l)elow  the 
aiitcnmr.  vvith  a  rounded  ])r()tubt>raiice,  distinctly  concave  immediately 
below;  ])il.,  *,f  ^'ace  short,  rather  sparse,  white.  Dorsum  of  t'lorax  bril- 
liant purple-colored,  with  a  colmlt  blue  rellectioii,  tlic  front  !)order.  hu- 

^iiit'ii,  and  sometimes  the  sides,  yellow.  Scutelliim  more  yellowish, 
cxci'pt  oil  the  (b>rsuin,  where  it  is  more  or  less  brilliant,  like  the  tho- 
r.icii' <lorsuin.    The  pile  of  the  thorax  is  sjtarse,  black;  along  the  late- 

(lal  sutures,  the  ])ostalar  callosities,  and  bonier  of  the  scutellum  with 
lather  long.  Very  distiiurt  black  bristles.  Abdomen  a  beautiful  brilliant 
]ai!|»lc,  or  coppery  red,  with  the  cobalt  rellectioii;  the  lirst   segment. 

land  tile  anterior  i)artoi  the  second  (more  broadly  in  the  middle)  yellow- 
i-li  wiiite,  subtransluceiit;  ])ile  very  short,  rather  abundant,  wiiitish. 
J.t'us  liiteous,  except  the  basal  two  thirds  or  more  of  all  the  femora,  and 
the  teiiiiiiial  portion  of  the  tibite  and  tip  of  tarsi,  which  are  black  or 

jlirowii.    Wings  hyi'liiie,  a  faint  spot  at  tip  of  tho  auxiliary  \'eiii ;  anterior 
cross-vein  rectangular,  close  to  base  of  discal  cell. 
rive  specimens. 

Volucella  sexpunctata.     (Pliile  VI,  lijr.  2.) 

liilitccllti  m:riiiiiiitnt(i  Lo(^\v,  Wicn.  Eiit.  Moiuitschr.,  v,  '.\8',  id.,  Ceiitnr.,  vi,  'i7. 
'   /A//.;/(7/.— Florida!,  Cuba(Lw.). 

i  i.9.  Length,  S  to  *.)'"'".  Allied  to  T'.  irsirxlosa.  Yellow  and  lu- 
fcitiis,  moderately  shining.  Front,  exceiit  the  vertex,  black  ]>iIo.se,  face 
|niiM(l(.iably  produced,  shining,  below  the  anteniiic  lightly  i).)lliiiose, 
|)i'ntuberance  large,  obtuse:  pile  short,  whitish.  Pectus  black,  ov  with 
Imv  black  spots.     Dorsum  of  thorax  more  reddish  or  brownish  above. 


»it 


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142  BULLETIN   31,    UNITED   STATES   MATIOJfAL   MUSEUM. 

clotlied  with  short  white  pile;  on  the  sides  and  border  of  scntelhim 
with  rather  long  yellowish  wliite  bristles;  the  scntellum  itself  more  yel- 
lowish triinslucent.  Abdomen  nearly  bare;  yellow  translncent,  or  even 
snbtransparent  at  the  base,  towards  the  tip  often  brownish,  perhaiw 
more  or  less  the  resnlt  of  drying;  the  i)osterior  margins  of  sccioud, 
third,  and  fonrtli  segments  each  with  a  rather  small,  (pnidrangular  blaok 
spot,  on  cither  side  m^ar  the  lateral  niiirgin;  on  the  seeoiul  and  tliird 
segments  they  are  broader  tlian  long,  and  often  joined  by  a  postciidr 
brown  fascia;  the  second  and  tiiiid  segments  sometimes  in  the  middK' 
behind  with  a  distinct  black  spot;  pile  very  short,  near  the  postciidr 
margins  of  thc^  segments  black,  elsewhere  ])allid.  Legs  yellow,  tip  df 
anterior  tibise  and  tip  of  all  the  tarsi  blackisli.  Wings  (piite  hyaline; 
a  small  browr.isli  spot  near  the  ti]>  oi"  anxiliary  vein;  the  third  vein 
reaches  the  costa  near  tip  of  wing,  the  second  vein  Joins  the  lir-il  very 
near  its  end,  sometimes  beyond  it.  so  that  the  marginal  cell  is  open. 
Four  si)ecimens,  comi)are(l  with  the  tyi)es  at  Canib    age. 

Volucella  situr.     (ri;itc  VI.  li^s.  n.  i-j  /,,) 

Volmclhi  miliir  Osttii  f^nckcii,  Wcsf.  Dipt.,  '.'.X\. 

Hahit(iL—Ki\usi\s,  Colorado!     TJtali  (O.  S.). 

S  ,9  .  Length,  *.>  to  10""".  Antenna'  light  brown,  arista  reddi.sli, 
loosely  plumose,  third  Joint  nearly  as  long  as  the  arista,  very  narrow 
in  the  male,  a  little  broader  and  more  expanded  m  the  female.  Face 
yellow,  a  black  strii)e  runs  obliquely  from  the  lower  corner  of  the  eyi' 
to  the  anterior  oral  nnirgin;  behind  it  the  cheeks  are  narrow;  protilc 
of  the  face  nearly  straight  in  the  male,  in  the  t'emiilc  a  little  receding' 
on  the  lower  part,  the  depr'vssion  i)elow  the  antenna'  is  very  slij^lir, 
Frontal  triangle  of  the  male  yellow,  l)eset  witi"  black  i)ile,  the  verte.\ 
black;  in  the  female  the  front  is  broad,  of  a  greenish  tinge,  as  if  under- 
lying the  yellow;  a  slender  median  yellow  line  runs  I'rom  the  anfeiiiKc 
towards  the  yellow  vertex;  the  ocelli  an^  on  a  cordiform  black  spot, 
Eyes  i)ilose.  Thorax  blackish-green ;  on  eaeli  side  bcitween  humerus  ami 
scutellum  a  rather  broad,  dull,  honey -yellow  stripe,  with  a  short  black 
streak  in  the  middle;  in  front  of  the  scntellum  a  yellowish,  rathei'  ob 
scare  parallelogram,  emarginate  anteriorly  ;  pleura'  wirlia  large  yellow 
spot,  beset  with  yellow  i)ile,  Scutellum  yellow,  with  l)lack  hairs  on  tla' 
edge.  Abdouu'ii  honey-yellowish ;  iiist  segment  black,  second  and 
third  with  a  nairow  black  hind  border:  the  black  bordei'of  the  second 
segment  is  connected  with  the  l)lack  of  the  tirst  segnu'Ut  by  a  black 
longitudinal  stripe,  which  is  narrow  in  the  female,  broad  and  triaiiuu- 
larly  expanded  anteriorly  in  the  male;  fourth  segnuMit  '..ith  a  broad 
black  hind  border;  fifth  segment  black.  Femora  black;  knees  ami 
two-thirds  of  the  tibiae  brownish-yellow,  the  last  third  black,  or,  on  the 
intermediate  pair,  brownish  ;  tarsi  reddish  at  base,  brownish  or  black 
at  tip.  AViiigs  grayish-hyaline;  stigma  yellowish,  with  a  small  pale- 
brown  cloud;  cross- veins  at  the  base  of  lirst  and  last  posterior  cells,  and 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIID^. 


143 


(if  the  (liscal  cell,  and  the  origin  of  the  third  vein,  with  small  indistinct 
luowishclonds;  there  are  still  .smaller,  almost  imperceptible  (ilouds  at 
tilt'  tip  of  the  second  vein,  near  the  junction  with  the  first,  and  on  the 
curvature  of  the  vein  closing  the  first  posterior  <-ell ;  the  latter  section 
(if  vein  is  more  ronnded  here  than  in  pmilla  and  fasciata;  the  marginal 
irll  is  not  quite  so  much  e.\])an(led  at  its  end  ;  ai-ierior  cross  a  little  be- 
loR-  the  middle  of  the  discal  cell. 
Three  specimens,  Western  Kansas  and  Colorado. 

Volucella  tau.     (Plat.?  VI,  liy.  i:?.) 

Volmclln  tail  Hij;(>t,  AuiiiilcH  Sor.  Eiit.  (!«•  France.  l^KJ,  h4. 

JIahitat. — California  !,  ^Mexico  (liigot). 

?,9.  Length,  9  to  10""".  Two  male  and  one  female  .specimens  from 
California,  which  agree  with  Mr.  liigot's  descriptictii  of  a  male  from 
Mexico,  are  very  closely  allied  to  V.  Hfttiii\  yet  aie  ai>pnreiitly  ditferent. 
In  ;ill  three  specimens  tlie  spots  on  the  wings  are  very  distinct  dark 
Inowii,  tliough  small;  the  antenna'  are  distinctly  longer  and  more  sUmi- 
ilor  (si'C  figure).  Mr.  Cotpiillett,  to  whom  I  am  iiid<'l»Ied  lor  tiie  priv- 
ilejie  of  examining  the  spc^cimens,  has  also  compared  a  number  more 
witii  drawings  of  the  antennae  of  botli  species  wliich  I  sent  him,  and 
liiiils  the  ditferonce  constant.  Tlie  female  lias  tiic  markings  of  tiie  ah- 
(Irniien  nearly  as  in  .satiir,  that  is  witii  the  black  cross  bands  iMitire;  but 
ilic  male  is  very  distinctly  diflerent.  In  this  sex  the  black  markings 
III"  coiilined  to  the  first  segment,  ami  an  iinerted  T-sha)»ed  spot  on  the 
second  segment,  the  posterior  black  band  being  abbreviated  a  consider- 
iililc  distance  before  the  lateral  margin.  The  third  and  fourth  seg- 
iiiciits  have  only  an  indistinct,  somewhat  brownish,  color  behind.  The 
hypopyojuin  is  black 

Volucella  obesa.     (Plato  •/,(!•>•.!».) 

Siiri)liii,i  ohtHitH  I'ahiicms.,  Sy.sl.  Hiit.,7l);{,  ."> ;   Kiit.  Synt.,  iv, '.iHvi ;  Syst.  Aiitl.,  ii'^7. 
}'<)liici'Hii  ohcHii  Wii'dciiiaiiii,  Anns.  Zw.  Ins..  ii,  lUit;  Macqiiart,  Hist.  Nat.  Di])t.,  i, 

4',M.  .■>. 
Oniidia  ithi'sd  .St.  l-'ari^caii  au<l  Scrvillo.  Kik  yd.  Mctli.,  x,  7^0. 
.'  I'DliictUd  aziirva  Pliilli])!,  Vt'iii.  Zool.  Hot.  (icscll.,  l.'^(ir),  7:i4,  pi.  xxvi,  Ii;;-. :!."). 

Ildhifiit. — Ti'oi)ical  regions  (auct.).  San  Domingo,  Mexico,  New  Mex- 
in»:.  Florida,  (O.  S.). 

-' .  Length,!).")"'"',  lirilliaiit  shining  green  witii  violet  n'llections. 
Aiitcmia'  brown,  third  joint  \  cry  short,  siibtiiangular :  arista  yellow, 
I'liirk  at  tip,  thickly  ])lumose.  I-'roiital  1  liatigle  small,  only  a  little  swol- 
ii'ii.  nilo  Itlack.  Face  a  beautiful  green  with  violet  reltections  in  certain 
lights,  thinly  pilose  ;  imiiiediat<'ly  below  the  anteima'  there  is  a  large 
vliitc  ])olliiiose  spot,  and  opposite  it,  near  the  eyes,  a  small  one.  In 
liotile  the  lace  is  obtusely  conical  below,  not  descending  far  under 
llii' eyes  ;  below  the  anteiune  rather  deejily  concave,  near  the  middle 
"I'llie^'ace  with  a  large  hemii-lliptical  tubercle,  and  above  it,  on  each 
M'lc,  a  somewhat    smaller  one,  so  that   two  distinct  j)arallel  grooves 


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144  BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 

are  seen  corresponding  to  the  antennae.  Eyes  thickly  pilose,  con- 
tiguous for  il  long  distance ;  vivtical  triangle  small,  black.  Thorax 
with  short,  black  pile,  in  color  bril'iant  green,  ab(ive  in  front  with  (lis. 
tinct  bronze  or  violet  reHcc^tions.  Second  segment  of  the  abdomen  (in 
each  side  with  a  large,  less  shining,  and  more  i)nrplisli,  lint  not  con- 
spi<;uous  spot:  ]>ile  of  abdomen  short,  black,  on  the  fourth  and  fiftli  seg- 
ments longer,  yellow.  Vente', ]>ectns,  and  cheeks  very  brilWant  blight 
green.  Legs  bhuik,  the  femorii  slightly  shining  green  ;  taisi  iiinni 
bi'ownish  or  reddish  bhudc,  the  hind  metatarsi  thickened,  and  as  lonjr 
as  the  remaining. joints  together.  Wings  nearly  hyaline,  faintly  Iikwh- 
ish  toward  the  base;  a  small  but  very  distinct  brown  spot  reaches  Irom 
the  costa  to  the  tmirth  vein  over  the  cross-vein,  which  is  very  ne;ii  in 
the  base  of  tlie  disci  (-ell;  at  the  junction  of  the  tirst  and  second  veins 
there  is  a  minute  brov,ii  sjjot ;  the  marginal  cell  atthe  ti])  juts  stronjily 
into  the  submarginal  cell. 

Five  specimens  from  San  L^omingo  and  one  trom  New  Mexico  (E, 
Keen).  Tlu'  synonymy  of  V.  azH>i,;  Thillipi  seems  ])robable;  the  ligiiie 
<loes  not,  ho'.vever,  show  the  bend  near  the  tilp  of  the  second  vein. 

Volucella  p-isilla.     (.Plate  VI,  li<;,s.  :i,:<a.) 

VoluceUit  pusiUa  Macqiiart,  Dii)t.  Exot.,  ii,  'I,  01,  1,  tat),  v,  li<^.  1. 
llahitat. —FloYuhx ! ,  Cuba. 

$  9  .  Length,  I)  to  10""".  Face  produced  directly  downwards,  only 
sligiitly  excavated  below  the  antenna\  with  a  slight  convexity  on  the 
lower  half;  yellow,  with  white  l)ile;  a  rather  broad  black  stripe  extends 
from  the  base  of  the  antenute  to  the  tij  -^n  the  oral  margin  continent 
with  the  black  of  the  cheeks,  the  latter  with  a  narrow  yellow  stripe. 
I'ltint  in  female  yellow,  with  broad  black  stripe  from  the  o(!elli  to  the 
antennas  ''i^'  !»''<'  '■'^  fuscous,  black  at  the  vertex.  Antenna'  brownish- 
black,  the  second  joint  yellow  at  its  base,  tliird  Joint,  in  the  male,  loufi, 
rather  slender,  very  little  broader  at  the  base ;  in  the  female  much 
broadc^r  throughout,  with  the  basal  portion  distinctly  convex  above; 
arista  a  little  long<ir  than  the  joint,  loosely  j)lunK)se.  Eyes  in  both 
sexes  thickly  black  pilose.  Dorsum  of  thorax  black  shininyin  its  niiddh', 
with  blackish  and  yellowish  pile;  on  the  sides,  extending  from  the 
humeri  to  the  i)osterior  angles,  with  a  broad  yellow  stripe  containinfj' an 
oval  black  si)ot  in  irs  nn'ddle;  in  front  of  the  scutellum  there  are  two 
small,  rounded,  yellow  spots;  pleurje  with  two  yellow  spots,  the  huj^ei' 
with  Ui  bush  of  whitish  i)ile  on  the  upper  lialf,  the  other,  smaller,  sjiot 
is  above  the  front  coxfe.  S<;utellum  light  yellow,  translucent,  towards 
the  base  with  yellow  i)ile  along  the  border  with  consiticnous  black 
l)ile.  AbdonuMi  black,  a  little  shining,  on  the  anterior  i)art  of  the  .sec 
ond  segment  with  a  narrowly  interrui>ted  yellow  band,  broadest  on  the 
sides;  third  segment  on  ea(5h  side  with  a  large  quadrangular  yellow 
spot,  not  reaching  the  margin  and  inclosing  an  oval  black  spot,  soiin- 
times  continent  with  the  black  of  the  margin.  On  the  anterioi-  seg- 
juents  the  i)ile  is  black  on  the  black  portions;  elsewhere  yellow;  be- 


% 


SYNOP.' iS    OF    NORTH    AMKKICAX    SYHPIIID^. 


145 


vond  the  third  .sctj^iiu'iit,  hdi^icr,  wiiilish.  Li'^.s  black,  witli  bhick  pile, 
the  fii'st  iuul  SL'cuiid  joints  ol  all  the  tarsi  yellow,  the  knees  more  or 
k'ss  reddish.  Winyswith  Itrowii  markings  as  follows:  across  from  the 
oiiji'inof  the  third  vein  to  the  origin  of  the  posterior  basal  cross-veiu, 
iVoin  the  tip  of  the  auxiliary  to  the  fourth.  (;louding  the  anterior 
cross-vein,  and  from  the  costa  beyond  the  auxiliavy  vein  to  the  outer 
posterior  angle  of  the  discal  cell,  sharply  delined  on  its  inner  border 
and  reaching  to  the  tii>  of  the  third  vein,  the  posterior  portion  iufus- 
ciite,  t!ie  costal  cell  somewhat  br(/wnish  ;  anterior  cross-vein  oblique,  a 
little  before  the  middle  of  discal  cell;  end  of  marginal  cell  expanded. 
Foiu"  specimens  (Professor  lliley). 

Volucella  fasciata.     (I'liit(!  VI,  fifi;.  4.) 

VolitccllK  J'dnciitta  M;ic(|u;irl,  Dipt.  Exot.,  ii,  2,vi2,  2;  pi.  v.  liy.  2;  Osteii  Sacken, 
W.'st.  Dipt.,  :!:il. 
UahitHt. — Western  Jvan.sas,  Colorado,  Texas,  Mexico,  (Jarolina ! 


S.  2. 


Mlgtl 


1,  7  to  S" 


Ivesembies  piinilla  (dosely,  but  is  distin(!t. 


The  yellow  stripe  of  tiie  cheeks  is  broader,  the  anteniiie  yellow,  biown- 
isli  toward  the  tij),  the  yellow  lateral  stripes  of  the  <h)rsum  of  the  thorax 
narrower,  the  meso-pleural  spot  smallei',  and  in  addition  there  are  three 
small  spots  below,  nearly  toutihing  eacjli  other,  tlu'  liiudiii(<st  one  in  front 
of  the  halt(H'es.  The  abdomen  has  three  rather  broad  yellow  bands; 
llie  anterior  one  on  the  second  segment  the  broadest,  widest  toward 
lln;  middle,  inlerin]»ied  oi' subinterrni)ted  :  the  others,  on  the  anterior 
))artof  the  tiiird  and  fourth  segments,  entire;  veut(!r,  in  addition  to  the 
broad  basal  baml,  with  one  on  the  third  segment.  Legs  bhu;k;  the 
knees,  basal  i)ortions  of  the  tibiie,  and  lirst  three  joints  of  all  the  tarsi, 
yellow.  Wings  v  th  the  markings  similai'  in  pattern  to  j)n.silla,  but 
I'aint,  showing  indications  of  three  or  four  laseiaj;  the  small  cross-veiu 
more  obli(iue,  and  joining  the  fourth  vein  very  jiear  the  middle  of  the 
discal  cell. 

it  is  not  improbable  that  this  is  the  V.  vacua  of  Walker,  List,  etc., 
iii,  (CJT. 

Volucella  victoria,  n.  sp. 

Uahitat. — New  Mexico  ! 

9  .  Length,  9.5""",  Deep  shiiung  blueblaek.  Front  and  face  amber 
yellow,  the  cheeks  shining  bhuik  ;  lateral  eres(!entric  grooves  of  thefront 
vory  distitict ;  a  mimite  spot  at  the  ocelli  black;  pile  black;  face  be- 
low the  antenniB  very  shallowly  (toncave,  produced  downwards  into  an 
acute  cone,  thinly  black  pilose.  Antenna'  wholly  •  "llowishred ;  third 
joint  of  moderate  length,  a  little  broader  at  the  base,  scarcely  I'margi- 
iiate  above;  arista  black,  modei'ately  pliunose.  Occiput  black.  excei)t 
for  a  lit  tie  distance  below  the  vertex,  on  the  sides  dusted  with  whitish. 
Thorax  thiidy  pilose,  in  front  chiefly  ligiit  colored,  behind  chiefly  black. 
Seutelltun  deep  pitchy-black  ;  on  its  border,  and  also  on  the  i)ost-alar 
callosities,  with  fine  black  bristles.     Abdomeu  with  a  blue  reflection, 


r    1/ 


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146     BULLETIN  31,  UNITED  STATES  NATIONAL  MUSEUM. 

clothed  with  very  short  black  pih',  a  litth^  loiif^er  toward  the  tip.  Legs 
wholly  black,  the  tarsi  on  the  inner  side  witli  sliort  reddish  pile.  Wings 
nearly  hyaline;  a  black  spot  at  the  tii>  of  the  anxiliary  vein,  beyond 
which  the  sti,uina  is  yellowisli ;  the  smal'  cross-vein,  the  cross-veins  ai 
base  of  dis(!al  and  third  ])osterior  cells,  the  last  section  of  thb  fourth 
vein,  and  the  second  vein  near  its  tip  with  narrow  bhn  k  clouds;  second 
vein  near  its  tip  gently  bent  into  the  subinarjiinal  cell,  last  section  of 
the  fourth  vein  stroii}>ly  ben!  inwards. 

Three   t  peciniens,  New  .Mexico  (G.  F.  Gaumer),  for  which  I  am  in- 
debted to  Mr.  Eu{>ene  L.  Keen,  of  Philadelphia. 

Vohicella  (Temnocera)  megacephala. 

Tvmiiorera  vicf/arcphala  Lorw,  Ci'iitiir.,  iv,  a?;  Osten  Sackcu,  Cat. D^)t.,  130. 

Habiidi. — Calilbrnia  (Lw.),  Arizona,  Mexico! 

9.  Length,!.".""".  Sliort,  brond,  Uiteous.  Head  very  large,  sordid 
luteous;  fi'ont  and  face  with  short  black  i)il(' ;  i»ile  of  the  eyes  very 
short,  whitish.  Occiput  and  cheeks  dilutely  luteous;  face  noderatoly 
produced,  the  usual  tubercde  nearly  wantinji".  Antenna;  ochraeeous, 
very  short,  the  third  Joint  moderately  excised  abov(\  ])orsum  of  tho- 
rax with  two  rather  obsolete,  broadly  sej)arated,  blackish  stripes.  Scn- 
tellum  wholly  luteous.  Vile  of  the  doisum  niul  the  scTitellum,  except 
its  border,  short,  black,  the  border  of  the  latter  wtli  pallid,  less  abun- 
dant pile,  and  without  bristles.  Phniric  above  luteous,  below  black. 
Abdomen  broad, subfuscous,  the  baseof  eatdi  se.ii'ment  narrowly  luteous 
and  clothed  with  ]iidlid  ])ile.  Venter  dilutely  luteous.  i)ile  very  short. 
pallid,  a  black  median  interrupted  stripe  blacdc  ])iIose.  Coxa'  and  tro- 
chanters black  ;  legs  ochraeeous  luteous,  pallidly  i)ilose,  ti])  of  the  tursi 
obscurely  fuscous.  Wings  hyalijie,  ajjical  half  of  the  costa  l)r()a(ily 
margined  with  cinereous  black;  the  transverse  veins  clouded  with  ;i 
more  saturate  black  color. 

Ti'anslation  from  the  original,  compared  with  the  type  specimen  in 
the  ^Museum  of  Compnrative  Zoology  at  Cambridge. 

Three  s])ecimens,  male  iiiid  female,  ai)parently  of  this  species,  from 
Arizona  and  Mexico  (J.  Aqiiilera),  I  have  since  examined.  The  ])ilosity 
of  the  eyes  is  woolly,  the  pile  of  the  face  only  in  i)art  black.  The  male 
eyes  are  contiguous  for  a  very  long  distam^e,  the  irontal  triangle  small. 
The  third  joint  of  the  antenna^  is  but  very  slightly  excised  above,  and 
the  abseiu-e  of  bristles  on  the  scutellum  makes  it  seem  strange  thai 
Loew  should  have  located  the  sjiecies  under  Temnocera.  In  the  male 
specimen  there  is,  in  addition  to  the  two  rt^mote  dorsal  thoracic  black 
stripes,  which  might  better  be  calied  spots,  a  median  one.  In  only  one 
specimen  does  Loew's  description  of  the  abdomen  applj*;  in  the  others 
the  second  segment  is  luteous,  except  the  outer  posterior  parts.  Tlio 
third  segment  is  l)roa(lIy  yellov/  in  front,  black  behind;  tl;e  tbnrtti  scu 
ment  broadly  yellowish  and  luteous,  except  two  large,  indefinite  black 
spots  behind.    The  species  is  a  large  one,  more  especially  characrerizcd 


rtVXOPSIS    or    XOHTII    AMKHIOAX    SVRPIIIDiE. 


147 


by  its  larjje  head.  In  all  my  spcciiiicns  the  length  is  somewhat  pfveater 
tlian  that  given  above.  The  apical  half  of  tiie  costa  is  not  at  all  niar- 
giued  with  cinereous  black,  thoufjh  the  veins  in  that  rejjion  are  narrowly 
blackish  (;londed.  Of  course  it  is  ]K>ssil)le  that  my  deterniination  is  not 
conect,  the  moie  so  IVuiii  the  fact  that  the  species  belongs  to  a  group 
tlie  nicinbers  of  which  are  not  easily  distinguishable. 

A  single  specimen  froui  jNIexico  with  the  i»receding  (.1.  A(|uilera),  and 
icseiiiltling  it,  1  have  not  been  al)le  to  determine.  The  hciid,  in  struc- 
ture and  coloration  thioiigiioiit,  is  veiy  nearly  the  saiiu',  except  that 
pcrliiips  tile  third  Joint  is  a  little  iiion*  excised  above,  a'ld  there  is  n 
bi'Oiul  brown  strip"  on  the  cheeks.  Tlie  dorsum  of  the  thorax,  except 
bioadly  on  tJie  sides  ;iiid  hciiiiid,  is  shining  black.  The  second,  third, 
and  Ibiirth  segnientsof  the  aWdomen  have  a  broad,  indelinite,  i)osterior 
blackish  band.  The  legs  are  darker  colored,  towards  the  base  of  the 
teiuora,  l)lacl;isli.  Tlie  wings  on  the  outer  half  are  almost  pure  hyaline; 
tbe  base  of  the  wings  is  brownish,  lighter  in  the  basal  cells,  and  beconi- 
in;;  (laik  brown  on  tlie  outer  part  of  the  costal  cell;  opposite  this  darker 
color  tlie  cross-\-eins  are  all  clouded  broadly  with  dark  brown,  forming' 
a  large,  (;onspicuoiis,  coidescent  dark-hrown  s\H)t.  The  abdomen  is  less 
robust,  and  the  size  smaller  (11.'"""). 

Volucella  (Temnocera)  Hagii.     (Plutt!  V.  fii;.  8.) 

Voliirdld  //((////' .lacimickc,  Ncuc  Exot.,  Dipt,,  89. 

Tcmiinccrd  xiiiijcra  Ostcii   Sai'l^cn,  Wc'wt.  Dipt.,  o-U;  v.  d.  Will]),  Tijdsi'br.  voor 
l!iit..  XXV. 

Habitat. — Mexico  (Jaen.),  New  Mexico  (U.  S.),  xVriz(ma! 

(5 ,  2  .  Jjeiigth,  14""".  "' Proboscis  nearly  twice  as  long  as  the  head, 
])ointed  at  tlieend.  Faceand  front  lioneyycljowisji,  clotlied  willt  black; 
]iil(',  which  is  very  short  on  the  face  and  longci-  on  the  front;  the  face  i.s 
excavated  below  the  antcmue,  its  lower  part  projecting  in  tlie  form  of  a. 
coue,  the  tii)  of  which  is  bilid  and  slightly  inliiscatt'd.  Aiitcniue  :  lirst, 
two  joints  yellowish-brown  ;  ihird  Joint  light  i»rown,  excised  above,  so 
that  its  latter  })ortion  is  iiuu-li  narrowfr ;  arista,  leathery,  black  ;  ])ro- 
boscisT  toS"""  long  [a  little  shorter  in  the  male],  black,  ])oinfed.  Tlioiax. 
(U-nsely  clothed  m  ith  a  yellowish  recumbent  pubescence,  and,  mixed. 
with  it,  short,  black,  erect  l)ile;  tiiey  almost  conceal  the  dark  greenisli 
ground-color,  as  well  as  the  obscurely  visible  yellowish  lateral  stri])e» 
and  hirge  yellowish  s])ot  in  tVont  of  the  scutellum  ;  on  the  sides  of  the 
thorax,  several  stilf  black  bristles;  a  jiair  [or  more]  of  such  bristles,  but 
.smaller,  a  little  in  front  of  the  scutellum  ;  pectus  blackish,  fcjcutelluiu 
somewhat  inllated,  honey-yellow,  beset  with  mixed  black  and  yellow 
imbescence ;  along  the  edge  fourteen  stiff  black  bristles.  Abdomen 
l)n»\viijsh-yellow  |or  ytdlowj ;  second  and  third  segments  with  broad 
blackish  jiarallel  l)or<lers  posteriorly,  formed  of  short  and  very  deuso 
black  hairs ;  the  cross-bands  thus  i)rodu(!cd  are  very  distinctt  whea 
viewed  (,>i)li(jnely,  although  almost  invisible  when  viewed  from  above; 


It 


II I 


I  i 


148 


HULLETIX 


r\rn:i)  statks  national  museum. 


hf, 


>;  I  * 


ir 


'  I 


that  on  the  st'coiid  sc^^int'iit  Dcriipics  more  tliiiiiont'-tliinl  [oroiicCouitir, 
that  on  the  third  more  than  one  hall"  [or  oiH'-thinl|,  ol'  the  leiij^th  of  llu. 
scunicnt  ;  st'^mcnt  lonr  sliows  ]>os1('riorl,v  m  sciiucirculiir,  lihick.  sliin 
jn;^  spot,  occ'iip.vinf;'  thi;  wliok-  po.-.tcrior  iiiari^hi  ainl  rcai.'hinj;'  bcvoiul 
thi' middle  of  the  segment  anteriorly  ;  sediment  live  [in  tlie  lemah' and 
tile  iiypopy;:iiiiii  in  the  malej  bl;i(!k.  J-Vniora  bhick.  iuiees  and  anterior 
hull  [or  tliir(l[  of  tlie  tibia!  brownish  yeMow  ;  tlie  renmiudei'of  the  tiltiit, 
as  well  as  tlie  tiirsi,  iire  (hirlcer  [tlie  tirst  liiree  joinis  of  the  tarsi  in  tin- 
maleare  redj.  \Vin;4s  urayisli  iiyaline  ;  cross  veins  and  lip  of  second 
vein  witii  sniiill  l)i()\vn  clonds ;  sti;;inii  brown. 

'•  One  specimen,  Vermejo  Jiivei',  New  IMexico,  ,TniH>  25," 
A  single  mah'  six'cimen  from   Arizona  (Mr,  K.  Keen)  .shows  only  uu- 
important  dilferem^es  from  tiie  fore^i'oinf;'  description  of  the  female  by 
Osten  Sacken,     These  diflferences  are  inchuled  in  the  brackets. 

Volucella  (Temnocera)  pubescena. 

Timuoccra  inihcHcrtiH  I,(H'\v,  Wicii.  I^iit.  Moiiatsclir.,  v,  lir*  ;  C'liiliir..  vi,  ;{.'>. 

Jhil)itai.—{'nhi\  (Lw,), 

9,  Len^itii,  I'J, .■)""".  IJhn-k;  the  head,  (htrsnm  of  thorax,  ui)por 
jiiiri  of  the  ph'nras  and  base  of  the  ab(h)men.  hiteseeiit.  antenntc  sub- 
fnscons,  winp-s  cinereonshyaline,  the  transverse  veins  wlioliy.  tlie  aux- 
iiiaiy  and  the  thii'd  lonjiitndiiial  veins  at  their  tips  clouded  with  fuscous, 

Head  luteoiis,  jiosterior  orbits  of  the  eyes  white  ]»ollinose.  Lower 
]»art;  of  the  face  stronj^iy  ])roiln('e(l,  acuminate,  thickly  clothed  with  veiy 
short  blacMv  pih',  Antenme  subfiiscoiis,  ujiper  mar;^iii  of  the  third  joint 
excised,  arista  black  and  black  ])lumose.  Proboscis  ekniyate,  black. 
Front  on  each  side  with  an  arcuate  impressed  line,  black  i)ilose,  inter- 
mixed with  sparse  yellow  pile.  Thorax  luteous:  disk  of  the  doisum 
with  three  very  l)road,  conllueiit,  black  stiipcs,  very  thickly  coveicd 
with  lutescent  jiile,  on  the  lateral  niarjiiiisand  behind  sparsely  jirovidcd 
with  bla(;k  bristles.  Upper  part  of  the  i)leur<X'  luteous  and  luteous  jm 
bescent,  below  with  the  ])ectus  black  and  black  ])ubescent.  Scntelliuii 
inllatetl,  not  impressed  before  the  tip,  luteous  on  the  disk  with  black 
pile,  on  the  margin  with  luteous,  alon/;'  the  border  with  ten  lilack  bris- 
tles. Abdomen  black,  thickly  black  i)ubes(;ent  tirst  and  the  <?reater  part 
of  the  second  segment  luteous  ami  luteous  pubescent.  Wings  cinereous- 
hyaline,  base  dilutely  lutescent,  second  'ongitudinal  vein  at  the  tip 
strongly  recurved,  and,  with  the  tip  of  the  auxiliary,  atid  the  transverse 
vieus  wholly,  slenderly  clouded  with  fuscous, — Translation, 

The  type  specimens  of  this  species  are  not  contained  in  the  Museum 
of  Ooinjiarative  Zoology. 

Volucella  (Temnocera)  purpurascens. 

Tdnnoi'cra  piirpiiroHccns  Loew,  Centur.,  viii,  r)2, 

Hahifaf.—lh\\t\  (Lw.)! 

9  ,  Length,  i;5  to  1(1""".  IJlack,  scutelluni  and  the  first  two  segments 
of  the  abdomen  iiurplish,  the  remaining  segments  and  the  venter  deep 


I'  I 


I    < 


SYNOPSIS    OF    NORTH    AMERICAN    .SYRPIIIDiE. 


149 


sn'olblue;  head  and  doi'siuii  of  tlie  thorax  with  jiallid  pile,  on  the  rest 
of  the  body  hhick;  winj'-.s  hyaline,  wilh  a  larf^e  black  inedian  si»<)t. 

Ileail  black,  front  an«l  face,  except  the  cheekis,  yellow,  occii)ital  orbits 
wliitish  pollinose  ;  j)ile  of  the  Iront,  of  the  face,  of  the  eyes,  an<l  of  the 
posterior  orbits  pallid ;  cheeks  bare.  Antennic  subfuscous,  the  lirst 
joint  and  the  arista  pitchy  black.  Thorax  black  shining;  tiie  dorsum 
with  liyht  yellowisii  i>ile,  on  the  pleurie  and  i)ectus  black.  Sciitelluni 
jdane,  i)ur[»lisii,  or  i)itchy  purplish,  without  bristles,  clothed  with  black 
pile.  Abdomen  broad,  somewliat  llattened,  shiniuj^',  short  black  pilose; 
tenninal  sej-inents  of  a  deei)  steel-blue,  or  a  purplish  steel-blue,  the  an- 
terior segments  purplish.  Venter  deep  steel-blue,  sliort  black  i)ilose. 
Legs  black,  with  short  black  pile;  tibiae,  except  the  tip,  led,  near  the 
iiiiuiediate  base  infuscate.  Head  of  the  halteres  white.  \Vinj;s  rather 
loui,s  hyaline,  with  a  large  black  si)ot,  touching  the  middle  of  the  costa 
aud  including  the  cross-veins;  veins  before  this  spot  chiedy  o(;hra(!eous- 
ferruginous,  in  the  spot  itself  and  on  the  outer  i)artof  the  wing  fuscous 
black,  the  (;()sta  itself  and  the  first  three  longitudinal  v<  ins  near  the  spot 
oi'iiraceous-)erruginous. 

Transhition  Iron)  the  oi'iginal,  compared  with  liie  two  type  specimens 
ill  the  .Museum  of  Comparative  Zoology  at  Cambridge. 

Volucella  apicalis. 

I'liJiKitla  apicalin  I^oew,  Cciitur.,  vi,  36. 

Hdhitdt. — Cuba  (Loew)! 

', .  lA'Ugth,  ().o""".  Yellowish-reddish,  base  of  the  abdomen  lighter, 
the  tip  more  obscuri ,  very  ol)soletely  roughened.  Dorsum  of  tliorax 
witli  scoriaceous  stripes,  idtimate  Joints  of  the  tarsi  blaciv,  apical  half 
of  tlu' wings  blackish  cloudt'd. 

Head  luteous,  face  n)Uchi)roduced,  shining,  the  antenna'  of  tin'  same 
color,  t  lie  third  Joint  above  lightly  concave.  Tlutrax  yellowish-reddish, 
with  four  dorsal,  scoriaceous  stripes,  pectus  piceous.  Abdomen  yellow- 
isli-red,  the  first  two  segments  (excci)t  the  hind  margin  of  the  se(!on(l) 
pallid,  terndnal  segments  obsoletely  subs(!oriaceous.  Legs  saturate  lu- 
teous; third  joint  of  the  front  tarsi  black  fuscous,  last  two  Joints  of  all 
the  tarsi  black.  Halteres  while.  Wings  dilutely  sublutescent,  near 
the  costa  luteous,  posterior  margin  clouded  with  cinereous,  veins  of  the 
apical  half  broadly  and  indeterminately  clouded  with  fuscous  black,  the 
clouds  of  the  second,  third,  and  fourth  veins  confluent. 

Description  translated  from  the  original  and  compared  with  the  type 
■Specimen  in  the  ^luseum  of  Comparative  Zoology. 

Volucella  cliaetophora,  n.  sp. 

Uahitat. — Mexico ! 

i .  Length,  10""".  Face,  yellow  translucent,  lightly  pollinose  on  tho 
sides  jd)ovc;  not  mucli  ])roduced  downward,  the  nearly  straight  lower 
liuider  of  the  clieeks  forming  an  angle  of  about  100^-1 10°  with  the  plane 


:i( 


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I 


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I  ■  I 


l.">0  nri,M:TlN    31,    united    STATK«    NATir»\AT,    MUSKUM. 

of  the  occiput;  in  the  middle  of  the  I'aci',  with  a  proiniiiciit  tubercle. 
isl)alh)\vl.v  coiictivu  bolow  tlio  fintenua;.  Tiiinl  Joint  of  tiir  iiiitcniui'  nut 
very  el(*nj^ate,  slender,  bicuderut  tbo  base,  not  ar  all  tiiiar;;iiiati',  .yellow; 
arista  dennely  plumooc.  Frontal  triangle  small,  hlaeU,  pilo.se  in  the 
middle.  Dorsum  of  thorax  shininj,'  cobalt  blue,  with  sparse  black  i)ile, 
{Scutellnm  cobalt  blue,  but  showinp'  a  translucent  icddisU  cast;  on  its 
border  with  six  stronjj;  bristles.  Abdomen  biowiiisli  black.  shiuiii{». 
Lefis  reddish  black.     Wings  hyaline. 

9.  l''rout  narrowed  above,  black,  with  light  jtile.  Alxlonien  witlia 
Kubopaiiue  cross-band  on  the  posterior  part  of  the  second  and  lliiul 
segmei  ts. 

Two  speciinu'tis,  Istiiiiius  of  Tehuantepec  (National  Museum,  rrofcssor 
Kiley's  collection). 

Vohicella,  ii.  sf. "' 

JItihifat. — Mexico ! 

f.  ltes«Mnbles  the  i)receding  closely,  but  the  antenna)  arc  darker, 
there  is  a  black  facial  stripe,  and  a  similar  one  on  the  cheeks,  and  the 
face  is  broadly  i)ollinose  on  the  sides.  The  second  abdominal  seginciit 
has  a  broad,  luteons  stripe  on  the  sides,  and  the  third  segment  has  a 
narrow,  broadly  interrui)ted,  cross-band  of  the  same  color.  The  wings 
are  broadly  brown  on  the  outer  part,  especially  in  front.  One  specimen, 
with  those  of  the  i)receding  species. 


I 
14 


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'I  I 


ADDITIONAL  NOUTH  AMERICAN  SPECIES. 

Volucella  abdominalia  Wiodoniann,  Auss.  Zw.  Ins.,  ii.  I'JC,  'i ;  Macqimrt,  Dipt.  Exot,, 

ii,  2, 5;5,  8. — Cuba. 
Volucella  amethystina  15if?"t,  Ann.  Scic.  Ent.  tie  France,  IH*.'),  479. — Mexico. 
Volucella  aperta  Walker,   '"'rans.  Ent.  .Sdc,  X.  Sit.,  v,  •2[)2. — Mexico. 
Volucella  castanea  liij^ot,  Ann.  Soc.  Ent.  de  France,  1875,  47(). — Mexico. 
Volucella  chalybescens  Wiedemann,  Auss.  Zw.,  ii,  204. — Brazil;  Jaonuicke,  Nene 

Exot.  Dit)t.,  p.  1.— Cnba. 
Volucella  fulvicornis  Bigot,  Ann.  Soc.  Ent.  do  France,  1888,  I8c4. — Panama. 
Volucella  lata  WiidiMnunn,  An.ss.  Zw.lnn.,  ii,  19."). — Mexico. 
Volucella  mellea  .Jaennicke,  Neue  Exot.  Dipt.,  88. — Mexico. 
Volucella  nigrifacies  Bijjot,  Ann.  Soc.  Ent.de  France,  187"),  479. — Mexico. 
Volucella  picta  Wiedemann,  Ans.s.  Zw.  Ins.,  ii,  2(11  :  ISiyot,  in  h'.  de  la  Sagra,  etc., 

H()2.— Hnizil  (W.),  Cuba  (Big.). 
Volucella  pulcliri.pe3  I)igi>t,  Ann.  Soc.  Ent.  de  Fiiincc,  1^7.■),  4-0. — Mexico. 
Volucella  postica  Say,  ,1.  Acad.  I'hi!.  vi,  Ititi,  "J  :  ('cmijd.  Wr.,  ii,  '.M). — Mexico. 
Volucella  purpurifera  Bigor,  Ann.  Soc  Ent.  dc  l"iaii(  c,  1.-7.').  177. — Mexico. 
Volucella  tibialis  Ma(i|ii;ut.  Dipt.  Esol.    ler  Snppi.,  I'j:!,  11. — Yucatan. 
Volucella  tricincta  IJiirot,  Ann.  Soc.  ICiiI.  I'rance,  I^7^l,  177. — Mexico. 
VolucelI-:\  U'islis  ISigol.  Ann.  Soc.  lOnl.  de  I'lance,  1,^7.'),  4-2. — Mexico. 
Volucella  (Temnocera)  unilecta  Wuiker,  'I'luns.  Ent.  Soc  N.  Si/r.  v,292. — Mexico. 
Volucella  vavians  111  i"!.  Ann.  Soc.  I'.iit.de  1"i;itk(  ,  li-^.').  481. — Jlcxico. 
Volucella  variegata  iSigot,  Ann.  Soc,  Ent.  de  France,  1875,  47S.— .Mexico. 
Volucella  virklula  liig'l,  Ann.  Soc  Ent.  France,  1-75.  l-Jl. — Jlcxico. 
Volucella  iTemnocera)  viridula  Walker.  Trans.  Ei\i.  Soc  N.  Scr.  v,  292. — Mexico, 
Volucella  violacca  Say,  , I.  Acad.  I'iiil.,  vi,  It'.O.  1;  Conqd.  Wi-..  ii,  ^(iO. — Mexico. 


SYNOPSIS    OF    KOKTH    AMKRIC'AN    SYUPfllDvE. 


151 


CUI'ESTVUIM/ 

r'o/)(«/i//'/m  .Mati|ii;irt,  I)i|il.  l'.\nt,  h' Siiiipl,.  l-JI,  l^-ld. 

Wholly  like  some  spccii's  of  lo/HrcZ/rf  (c  u..  V.fasriota,  V.  satur,eU'.), 
i'X('(»l)t  in  the.  slriK'tiiic  (»r  tlic  uiitciiuii'.  Mndy  sliort;  iiIkIojikmi  nlioif, 
hntad,  oviil,  fasciatc;  h'ys  liillu-r  slt'iMJrr.  I'act'  itroduccd  directly  down- 
wiM'ds,  obtusely  coiikm!  Iiclow,  puintrd  imd  nniclicd  at  tiic  tip.  sli;;!illy 
mliciculato  below  liie  middle;  iVoiit  arelied;  aiiteiina'  siliiated  near 
iili|ier  tliird  of  hoad  in  i»roflle,  .slender,  first  Joint  vei'\  -sliort,  second 
jaiiit  a  little  elon^^ate,  tliird  Joint  .slcMider;  arista  in.serted  near  tlie  l)a.so, 
luiiiicr  than  the  Joint,  thickened  lliroii^hont  its  lenj;tli.  densely  pbiiiiose 
with  siiurt,  llatteued,  hair-like  pile,  appearinj;  nnder  a  low-power  ;;Ias.s 
like  a  solid  mass,  under  a  higher  pow.-r  fJO-'id  ilianielei's)  the  ari.sta 
shows  a  uradiial  thickening'  to  near  its  end;  ;lie  pile  is  line  neai'  it.s  in- 
scrti(tn,  but  tiattened  beyoml.  in  striH'tnre  not  unlike  elongated  s<',ale8 
froiii  some  lepidopteia.  ICyes  pilose,  e()iiti,unoiis  in  male.  Winj^'s  as  ill 
Voliicella,  mar;^inal  cell  (dosed  and  peliolate,  tip  (tl  t'onrlli  \'ein  bent  ill- 
ward,  small  ci'os.s  vein  near  middle  of  discal  (;ell,  oblicjne.  Type  of 
ge'iiis  ('.  iiiarffhiatiDii  (Say)  ().  S..  >«ortli  Ameiica. 

Copestylura  marginatum.     O'li't'' ^'H.  liji".  1.  1",  !''•) 

roliicclla  murijiiiutn  S.iy,  .lour.  Acail.   I'liil..   vi,    hiT,  I!;    i  i>iiipl.   VVi   ,   ii,  ;]60; 


Ost 


en  Siir 


■II,  \V( v^t.  Dii.t. 


('oiicntjiliiin  Jlariniilris  N[,iciiii;irl .  niiit.  Kxui.  Ir  Siipiil.,    l-J.") ;  ))1.  x,  fijr.  Iti. 
('oiieKtijJnm  mnrijiiiiilinii  Ostcii  .Sackcii,  Cat.  Uipt..  il!(t. 

Ildhitat. — ^lexico  (Say),  Venezuela  (Maccj,),  Texas,  Arizona,  Mon- 
tana, Calilbrnial 

^  .  9  .  Length, !)  to  11""".  Face  whitish  yellow,  with  a  black  median 
.strip*',  reachiu}?  from,  or  near,  the  ba.se  of  the  antenme  to  the  oral  mar- 
gin ;  cheeks  black,  shininji',  with  a  narrow  yellow  stripe  rnnninjj  fronj 
the  eye  to  the  oral  mar,i;in,  sometimes  the  yellow  ])redomiiuircs,  leaving 
only  a  black  .stripe;  antennai  varyin.ij;- from  alis'ht  yellowish-red  toquite 
black,  se('ond  Joint  about  one-third  thelenf,'th  of  the  third  Joint.  Frontal 
trianjile  black,  shininj^,  or  with  two  oblong'  yellow  sp(>ts  near  the  orbit 
(var.  lentum,  natne  new),  ])ile  usually  limht -colored,  soiiu'times  black; 
front  in  female  bhudc  on  the  upper  half,  on  the  sides  below  tlie  yellow 
of  the  face  sometimes  extends  up,  ])artly  cut  oil'  by  an  ex])ansi()n  from 
the  black  at  the  base  of  the  anteiuiie:  near  I  he  middh'  of  the  front  are 
two  small,  oval  sjiots,  that  are  sometimes  wanfin<:-,  at  other  times  con- 
tliieiil  with  the  yellow  of  the  sides.  Thorax  black,  sliiiiinii',  \vith  wiiitish 
l»ile,  which  is  longer  on  the  ])leur;e;  sides  of  dorsum  with  a  stripe,  en- 
tire or  interrupted,  and  two  spots  in  front  of  the  scutellum,  yellowish. 
Ill  other  specimens  tlu>  i)ileis  longer,  mixed  with  black,  or  wholly  black, 
iiud  the  yellow  of  tiie  dorsum  is  entirely  wanting  (var.  Irntuni).  Scutel- 
lum yellow,  with  white,  bhutkish,  or  black  pile.     .Vbdomen  bhndi,  with 

*  Korr//,  ii  .strikiiij^',  and  (jre/lof,  a  styli-. 


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tliU'i-  iiiteiTupU'd  bands;  tlic  first  two  pairs  of  spots  large;  tlu'  third 
narrow,  t'itlier  a  liglit  translucent  yellow  or  an  intonsi)ieiions  l>lui.>ii; 
in  sonje  specimens  the  yellow  becomes  more  or  less  continent,  so  thai 
the  dorsum  is  chiefly  yellow;  venter  wholly  black,  with  a  lif-ht  yt'llow 
median  transverse  band,  or  wliollj'  yellow,  exce])f  the  tip.  Lejjs  black; 
tibije  on  the  jiroximal  third  yellowish,  metatarsi  and  sometimes  the 
second  and  third  joints  red  ;  wings  hyaline;  stigtiia  biownish. 

Thirty  si)ecimens  (Comstock,  Coquillett,  Morrison). 

This  species  shows  very  great  variation  in  color  and  markisigs.  In 
isolated  specimens  one  would  scarcely  consider  the  ditlerences  to  be  less 
than  specific,  but  the  variations  are  inconstant,  and  «lo  not  seem  to 
be  of  more  than  varietal  worth.  Some  specinjcns  agree  well  with 
Macquart's  description  and  figure,  while  others  ha\e  still  more  yellow, 
as  in  Say's  spe^jimens.  A  very  dark  variety  in  which  the  thorax  is 
clothed  with  black  pile  and  wholly  lacking  the  yellow  of  the  sides  and 
before  the  scuteUum,  tlie  venter  wholly  without  yellow  and  the  anteniire 
black,  may  be  distinguished  as  variety  lentum. 

In  nine  S])ecimens  from  Montana  (Professor  Comstock)  the  size  is  dis- 
tinctly smaller,  the  facial  stripe  is  narrower  and  distiiurtly  separated 
from  the  black  at  the  base  of  the  antenna)  by  a  yellow  interval,  the 
f''ontal  triangle  is  yellow  along  the  eyes  and  the  outer  part  of  the  sec- 
ond vein  is  less  sinuous.     These  differences  are  i)Ossibly  specific. 

Copestylum  limbipeniiis,  ii.  Hp. 
ILthitat. — Mexico ! 

5.  Length,  9""".  Face  black,  clothed  with  short,  white  pile,  witli 
two  rather  narrow  yellow  stiipes,  convergent  below.  Front  black,  with 
short,  white  i)ile,  and  a  small  yellow  spot  on  each  side  near  the  middle 
Antenn.'e  brown,  second  joint  red;  third  joint  not  twice  the  length  "I 
the  second,  not  one-half  as  long  as  tlu^  arista;  arista  long,  black,  grad 
ually  and  symmetrically  widened  from  the  base  to  near  the  tii).  Eyes 
with  short,  not  al)undant,  white  pile;  in  the  middle  with  an  elongate. 
vertical  stripe  of  bhuik  pile.  Thorax  shining  black,  .vith  short,  white 
I)ile;  a  small  spot  behind  the  lnimeri,  a  slender  intraalar  vittula,  and 
two  small  spots  in  front  of  the  scutellum,  yellow ;  the  pleuric  with  a  small. 
vertical  yellow  spot  on  the  meso-plenra!.  Scntellnm  yellowish  brown, 
subtranslucent.  Abdomen  black:  an  oval,  obli(pie  s|)()t  on  each  side  ot 
the  second  segment,  toward  the  front,  a  larger  semi  oval  spot  on  eacn 
side  of  the  third  segment  in  front,  and  the  fourth  segment  almost  wholly 
yellowish  retl  or  reddish  yellow;  venter  black,  with  a  pair  of  large  ov:d 
spots  on  the  posterior  part  of  the  second  segment.  Legs  deep  n)aho>,'- 
any-black.  Wings  hyaline,  broadly  brown  in  front,  the  brown  begin 
ning  gradually  from  near  the  origin  of  the  second  vein,  and  tilling  out 
uniformly  the  costal,  subcostal,  marginal,  and  ail  of  the  submarginal 
cells,  and  clouding  the  i)i)sterior  margin  of  the  third  vein,  the  anterior 


!|il 


SYNOPSIS    OF   NORVH    AMERICAN    SYRPHII)^. 


153 


dOss-vein,  the  distal  part  of  the  fourth  vein,  the  posterior  cross-vein, 
1111(1  tin*  veins  at  outer  end  of  the  second  basal  cell. 

\  sinyle  specimen,  Isthmus  of  Tehuautei>ec  (National  Museum,  Pro- 
fessor Itiley's  collection).  This  specimen,  althouy:li  I  have  hut  the  one 
lor  comparison,  otters  most  excellent  structural  diflerences  from  0. 
marffinatum  in  the  antenna',  in  the  front  beinj;- considerably  uarrower 
above,  and  in  the  slender  i)ilose  strii»e  of  the  eyes.  The  pile  on  the  eyes 
i)f  marginatum  is  black  in  the  middle,  but  does  not  ])reseut  the  distinct 
vittulate  appearance :  it  is  also  throughout  much  lon^fer  in  marginatum. 
Tlic  broad,  brown  marking;' of  the  outer  anterior  i)art  of  the  wings  is 
conspicuously  ditterent.  The  coloration  of  the  body  and  legs  is  prob- 
ably variable.  On  either  side  of  the  base  of  the  antennse  there  is  a 
small,  yellow  spot,  and  the  cheeks  show  an  indication  of  a  yellow  stripe. 


SERICOMYIA.* 

Serieomya  Meigeu  in  Illiger's  Maga/..,  ii,  274,  IHOIJ. 

Large,  robust,  thinly  pilose  species,  black,  with  yellow  interrupted 
fascite  on  the  abdomen.  Head  hemispherical,  somewhat  flattened. 
Antennie  short,  third  joint  rounded  or  subcjuadrate,  arista  feathery 
plumose.  Face  lightly  excavated,or  nearly  straight  below  the  antennaj, 
with  •.  slight  convexity  near  the  middle,  thence  concave  to  the  oral 
boidci",  descending  moderately  below  the  eyes,  in  prolile  obtuse.  Eyes 
l)are,  contiguous  in  the  male.  Abdomen  elongate  oval,  broader  than  the 
thorax,  gently  arched,  nearly  twi(!e  as  lo!ig  as  the  thorax.  Legs  strong, 
hind  feiriora  sometimes  somewhat  thickened,  hind  tibiaj  somewhat  bent, 
at  the  tip  sometimes  with  an  angular  i)rotuberance.  Marginal  cell  open, 
rliird  vein  slightly,  sometimes  considerably,  curved,  anterior  cross-vein 
a  little  before  or  near  the  middle  of  the  discal  cell,  a  little  oblique. 
Type  of  genus,  8.  borealis  Fallen,  Europe. 

TAr$LE  OF  SPECIES. 

1.— Black  facial  stripe  very  broad ;  bands  of  abdomen  yellowisli  white  (?)     .     lappona 

Facial  sirii>e  moderately  broad  :  baiidn  of  abdomen  more  yellow 2 

2,— Second  abdominal  segment  with  two  yellow  dots,  or  wholly  black;  hind  femora  of 
male'  considerably  thickened militaria 

Second  al)doniinal  segment  with  a  median,  interrupted  fascia 3 

3.— Yellow  abdominal  bands  broadly  interrupted,  the  ajxits  more  or  less  donnato 
honr-glass  shaped sexfasciata 

The  yellow  bands  narrowly  interrupted,  the  spots  not  constricted  ....  4 
4.— Fourth  segment  (i:i  the  male  at  least)  witiiout  yellow  cross-band   .    .    bifaaciata 

Fourth  segment  with  cros8-l)anil  like  tluKse  of  preceding  segments  ....  5 
5.— Abdondnal  spots  distinctly  oblii|iie chrysotozoides 

Abdominal  spots  transverse chalcopyga 

*  lijpiK<ii,  silken,  uud  fivia,  a  lly. 


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154  BULLETIN   31,    UNITED    STATES   NATIONAL   MUSEUM. 

Sericomyla  lappona. 

Miiava  lappoHa  Liund,  Ftiuna  auecica,  1794. 

HyrphuH  lappo.ta  Fabiiciiis,  Spec.  Iiih.,  ii,422, 4  ;  Entom.SyKt.,  iv, "80;  -., «t.Aiit:., 
226,  7;  Fallen,  Syrph.,  20,8. 

Sericomijia  lappona  Mim^ch,  Syit.  Hi'.scbr.,  iii,;M4,3;  Macquait,  Hi.st.  Nat.  Dipt.,  i, 
49(5,  '.i;  Z(!l t<T8twlt,  IiiH.  Lapp., ."»'.»(»,  2 ;  id.  Dijit.  .Seaiid.,  ii, (l-Jfi,  4,  viii,  :{110  ;  Walk. 
er,  IiiM.  Brit.,  i,2():i, 2;  Schiiier,  Fauna  AiiMtr.  Dipt.,  i.HiW;  v.  d.  Wiilp,  Tijdsclir, 
V.  Eiiioiii.,  XXV,  I'.'C). 

f  l'i>lucella  lappona  O.  Fabricius,  Fauna  Gi()(;nl.,20d,  UYJ. 

Hahii'if. — Kiirope,  Caiiadii  (v.  d.  Wiilp.),  Grt'enliUMl  ?  (O.  Fsibr.). 

(?,  9.  Lciiyili,  10  to  12""".  Ulack.  Iliuiieri  white  pollinose;  pleura 
with  ii  tuft  of  .V('lh)\v  pilo ;  tho  pile  el. sew  he  re  short,  blacki.sh  brown  or 
dark  reddish  yellow;  .scuteiliun  yellowish  red.  The  very  narrow  whit. 
ish  yellow  bands  of  the  abdomen  on  the  second,  third,  and  fourth  seg- 
ments, narrowly  interrupted,  the  last  usually  entire.  Facje  black,  on 
tb",  sides  broadly  whitish  yellow  ;  front  black ;  antennae  blackish  brown, 
the  third  joint  somewhat  lighter.  Legs  dark  reddish  yellow,  front  fem- 
ora at  the  base,  and  terminal  joints  of  the  tarsi,  black.  Wings  at  the 
base  reddish  yellow,  on  the  anterior  border  grayish  brownish,  between 
the  end  of  tho  marginal  cell  and  the  first  posterior  cell,  sometimes  a 
brownish  spot. — Translation  from  Schiuer,  1.  c. 

This  species  is  given  on  the  authority  of  F.  M.  v.  d.  Wulp.,  who  coin 
pared  specimens  collected  in  the  vicinity  of  Quebec.  He  says :  "  Dat 
zij  in  Canada  voorkomt,  kann  nu  als  zekerworden  aangeaomen."  The 
synonymy  is  given  from  Schiner. 

Sericomyla  bifasciata,  n.  sp. 

Habitat. — New  Hampshire! 

i.  Length,  11'""'.  Face  yellow;  cheeks  and  a  broad  median  stripe 
shining  black.  Antennae  brownish  red,  third  joint  subquadrate ;  arista 
thinly  plumose.  Dorsum  of  thorax  shining  black,  thinly  dark  pilose; 
on  the  inner  side  of  each  humerus  with  a  spot  of  silvery  pollen.  Abdo 
men  shining  black ;  pile  on  the  sides  in  front  yellow ;  second  and  third 
segments  each  with  a  yellow  cross-band,  narrowly  interrupted,  and 
broadened  on  eacl'  side;  fourth  segment  wholly  shining  metallic.  Fe- 
mora except  the  base,  and  the  tip  of  tarsi,  black ;  legs  elsewhere  red 
dish  yellow,  the  tibiae  in  the  middle  more  luteous.  Wings  brownish  in 
front,  the  base  of  the  second  vein  and  tlie  middle  eross-voins  narrowly 
clou<led  with  brtnvn;  third  vein  not  at  all  curved  into  the  first  posterior 
cell. 

Two  specimens,  Mt.  Washington  (Dr.  Dimmock,  National  Museum, 
Professor  Riley's  collection).  In  one  of  these  specimens  the  fourth  ab- 
dominal segment  is  somewhat  tubulate,  in  the  other  it  is  not  difleren 
tiated  and  has  less  of  the  bronze  lustre ;  in  the  same  specimen  the  dor- 
sum of  the  thorax  shows  a  distinct  blue  reflection. 


1^1! 


SYNOPSIS    OF    NORTH    AMKRICAN    SYRPHIDiE. 


156 


Sericomyia  sexfascicita. 

citrir.omjiii  xfsj'uaiiula  Wulkor,  List,  etc.,  iii,  .VJ,i. 

/lahi tat. —lhu\sou  liny  Territory  (Walk.,  L\v.)! 

(J.  Leugth,  14,5'""'.  Face  light  yellow,  tliickly  wiiitisb  poUiuose;  a 
rather  broad  median  stripe  pitchy  black;  cheeks  black.  Antenna} 
obscurely  yellow;  the  basal  joints  blackish;  the  third  joint  nearly 
square;  frontal  triangle  black,  white  pollinose;  pile  of  head  light  yel- 
low. Dorsuui  of  thorax  shining  metallic  black;  clothed  witii  erect,  rather 
abundant  pile,  in  front  and  narrowly  beliind,  and  on  tlie  l)ase  and  border 
of  scutelluni,  yellow;  across  the  disk  of  the  dorsum  and  scutellum,  black; 
pleuric  with  light  yellow  ])ile.  Abdomen  black,  nearly  opaque,  on  the 
sides  of  the  second  segment,  narrowly  along  the  margins  of  the 
abdomen,  and  hypopygium,  with  yellow  i)ile,  elsewhere  chietly  black 
pilose;  second,  third,  and  fourth  segments  each  with  a  pair  of  yellow, 
elongate,  moderately  broad  si>ots ;  the  spots  do  not  reach  the  lateral 
margins,  and  are  rather  broadly  separated,  and  are  most  especially 
characterized  by  a  constriction  in  the  middle,  especially  on  the  front 
pair,  where  they  are  elongate  hour-glass-shaped.  Legs  black  ;  the  base 
and  tip  of  all  the  tibi.^c,  and  the  tarsi,  except  the  tip,  yellow;  the  tibiae 
in  the  middle  more  of  a  deep  brown.  Wings  yellowish  hyaline,  the  im- 
mediate base  and  the  stigma  yellow ;  third  A'eiu  with  a  gentle  curvature 
into  the  first  posterior  cell. 

One  specimen,  in  the  Loew  type  collection  at  Cambridge. 

Sericomyia  iriiita'-id.    (IMato  VII,  tigs.  ;{,  3«,  '.ib.) 
Sericomyia  militariii  Walker,  List.,  etc.,  iii,  .'/J.'). 

Habitat. — Hudson  Bay  Territory,  Xova  Scotia  (Walk.),  New  York, 
!New  Hampshire,  Colorado,  New  Mexico, Canada!,  Red  River. 

i.  Length,  15""".  Face  whitish  yellow,  shining;  cheeks  and  broad 
median  stripe  black:  pile  wbitii^li ;  face  receding  below  the  antennsE, 
then  vertical  and  straight  to  the  protuberance.  Frontal  triangle  black; 
with  black  pile,  white  i)ollinose  on  the  sides.  Antennie  nearly  black, 
tiiinl  joint  subcjuadrate,  but  little  longer  than  wide;  arista  black.  Orbit 
white  duste«l  and  with  white  pile.  Thorax  black,  shining;  the  dorsum 
more  bluish,  clothed  with  rather  abundant  pile,  darker  between  the 
wings;  humeri  whitish  ludlinose;  on  the  ui)per  part  of  the  mesopleuraj, 
and  immediately  above  the  suture,  with  a  tuft  of  whitish  yellow  pile, 
another  sihaller  one  on  the  post-alar  callosity.  Scutelhun  reddish  black 
<»n  the  disk.  Abdomen  greenish  black,  somewhat  shining,  with  black 
pile,  whitish  yellow  on  the  lateral  and  i)osterior  parts.  Second  seg- 
ment with  two  small  dots,  sometimes  wanting;  thinl  segment  with  two 
very  narrow,  a  little  oblique  si>ots,  acute  at  their  outer  ends;  the  fourth 
with  two  similar,  a  little  broader,  spots,  yellow ;  the  narrow  posterior 
border  of  second,  more  broadly  on  the  third,  and  the  fourth  wholly, 
metallic  shining ;  hind  margin  of  the  third  segment  with  a  fringe  of 


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BULLETIN    31,    UNITKlJ    STATHS    NATIONAL    MUSEUM. 


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whitish  yellow  pil«\  reinoni  bhick,  tlicir  tip,  llic  (ibitu,  iind  first  two 
or  three  Joints  of  tiie  tarsi,  leddish  yellow  ;  terminal  Jo.iits  of  iiU  tlic 
tarsi  black.  Hind  femora  thieUened,  their  coxie  with  an  obtuse  tuber- 
cle. Winjjs  faintly  brownish,  anterior  basal  portion  luteous,  outer  part 
brownish;  third  vein  somewhat  arcuate,  <*ross  vein  near  the  middle  of 
di.scal  cell. 

9  .  Third  joint  of  the  antenuHi  a  little  larger;  front  black,  with  black 
pile,  and  a  grayish  dusted  cross-band  below  the  middle,  slender  in  its 
miildle  part.  The  abdomen  is  wholly  light  yellowish  ])ilo8e;  the  liind 
coxju  without  a  tubercle  below,  and  the  femora  not  thickened  norcurvwl. 

Six  specimens,  White  Mountains,  New  Hampshire,  July  15  (Dr.  (1. 
Dimmock),  Oanada  (.1.  li.  Caulfield,  William  Brodie),  New  York  (Van 
derzee),  New  Miixico  ((Iraumer). 

This  species  in  its  thickened  femora,  partially  obsolete  abdominal 
cross-bands,  and  distinctly  curved  third  longitudinal  vein,  connects  this 
genus  with  Arrfophila. 

Sericomyia  chalcopyga.     (Plati-  VII,  li^s.  2,  '2a.) 
Scricomyiti  ('lialcopuf/d  Lfiew,  Cfntnr.,  iii,  20. 

Ifttbitat. — Sitka  (Lw.),  Washington,  Oregon! 

^  ,  9  .  Length,  12  to  15""".  Front  in  female  black,  whitish  pollinose 
on  the  sides  below.  <!lothed  with  bla.:k  idle;  fiontal  triangle  black  pilo.se. 
Antenniii  reddish  bla<;k  (tr  black,  third  joint  sub<piadrate.s(;ar(H'ly  Ioii^h 
than  wide,  i  little  broader  at  the  end  ;  arista  blackish,  twice  as  loii;:  as 
the  joint,  h'ace  yellow,  with  whiti.sh  pile;  broad  median  stripe  ami 
cheeks  shining  black  ;  sciarcely  ;it  all  excavated  below  the  antenna'. 
Occiput  black;  orbits  yellowish  white  j)t)lliiiose,  and  with  similar  col- 
ored i)ile,  more  or  less  black  above.  Thorax  black,  bluish  shining,  with 
blackish  |)ile,  more  or  le.ss  yellowish  in  ii-ont  and  behind  ;  on  the  micso- 
pleur.T  with  a  yellow  tuft,  and  just  above  the  suture  a  smaller  one. 
Scutellum  more  or  le.ss  reddish  ,m  the<lisk;  jole  mostly  black.  Abdo 
men  black,  oi)a(pie,  with  short  black  pile,  and  with  three  narrow  yellow 
fascia',  nearly  tran.sverse,  narrowly  interrupted;  second  segment  on  its 
sides  with  yellow  ])ile  ;  third  segment  very  narrowly  shining  on  its  pos- 
terior border ;  fourth  segment  broadly  behind;  fifth  segment  wholly,  shin- 
ing metallic  green,  clothed  with  longer  reddish-yellow  pile;  the  latenil 
nuirgin  of  the  abdomen  with  a  fringe  of  similar  reddish-yellow  pile.  All 
the  femora  slender ;  black  at  the  base,  or  nearly  entirely  so ;  their  outer 
half  or  tip,  the  tibitc,  and  first  two  or  three  joints  of  the  tarsi,  reddish 
yellow;  terminal  joints  of  all  the  tarsi  black.  Wings  a  little  fuscous; 
in  front  as  far  as  the  cro.ss-veiu  brownish  yellow,  beyotul  faintlj'  black- 
ish ;  the  veins  in  the  yellowish  part  are  mostly  yellowish  or  reddish; 
third  vein  very  slightly  concave,  almost  straight,  cross-vein  distinctly 
before  the  middle  of  discal  cell,  oblique. 

Fifteen  specimens. 


II  ' 


I       I 


SYNOPSIS   OF   NORTH    AMERICAN    SYRPIIIDiE. 


157 


Sericomyia  chyBotoxoides.     (Pliitc  \'II,  ll;;s.  4,  la.) 

Serkoitiiiiii  cliriimtoxoidiH  Miui|tiait,  I)i])t.    Kxot.,  ii,  'Z,  19,  1;  pi.  iii,  tig.  3  bis. 

(lualf). 
Sericonui'm  limlupemiin  Mii('(|iiai't,  iliid.,  Vo  Siippl.  5H,  "i  (feniulo). 
Scricomiiia  I'll  ill  Walker,  List,  otc,  iii,  .'>'.)(). 

Habitat. — Atlaiitiv-  Stati\s,  CiUiada. 

-J ,  9 .  Lcn^fli,  10  to  IL'""".  l-'acc  .shining,  wliitisli  i)olliii()80  on  the 
sides;  ycllowi.sh  wliito,  with  similar  (toloicd  i)ik';  (dietdi.s  and  a  median  . 
stri|)t3  (wliic'ii  i.s  hioadcst  in  its  middle,  and  scarcely  reaches  the  an- 
teiinie),  black  ;  in  ]>r()tile  coiisidc^-ahly  coiicave  below  the  antenna).  An- 
tenna) bla«!k;  third  joint  abont  twice  as  lonj>-  as  broa<l,  ronnded  on  its 
outer  antjles ;  arista  black.  Front  black,  shininy,  opaqne  across  the 
middle,  on  the  sides  below  with  yellowish-gray  dnst;  pile  black.  Oc- 
cijmt  black,  whitish  i»ollinose  on  the  lateral  orbits,  and  with  white  pile. 
Thorax  black,  shinitifj ;  dorsnm  with  two  laint,  median,  slender,  pos- 
teriorly abbreviated,  opaqne  stripes;  pile  sparse,  obscnrely  yellowish  or 
blackish,  on  the  sides  with  a  tnft  of  yellow  pile.  Scntellnia  shining 
Idack;  i)ile  in  large  part  yellow.  Abdomen  black,  opaque,  with  the 
tii.sciie  more  oblique,  a  little  broader  and  more  distinctly  interrupted 
tliiin  in  S.  chalcopijija ;  second  segment  narrowly;  third  .segment  niore 
broadly,  and  the  Iburtli  I'or  nearly  half  its  width  on  the  postei'ior  part; 
the  filth  wholly,  shining  greenish-black  ;  jtile  whitish-yellow  on  the 
.sides  in  front,  the  lateial  margins,  and  the  jtosterior  poition.  Legs 
yellow;  anterior  and  mi<l(lle  femoia  black  on  the  basal  half,  the  pcste- 
rior  pair  either  not  at  all  or  a  spot  neai-  the  mi<ldle  in  IVoiit;  in  the 
male  all  the  femora  except  their  end  black,  the  last  two  Joints  of  all 
tlie  tarsi  also  black.  Wings  a  little  clouded  on  the  inner  part;  in  front 
yellowish-brown  with  yellowish  veins;  on  the  outer  i)art  from  the  lirst 
to  the  third  veins  blackish;  cross- vein  before  the  middle  of  the  discal 
cell. 

Twelve  specimens. 

The  antenna)  in  the  male  have  the  third  joint  broader  toward  the  end, 
whereas  in  the  female  it  is  a  little  narrowed.  There  can  seem  to  be  no 
uoubt  of  the  synonymy  of  8.  Umhipennis,  described  from  a  female,  with 
8.  chrysotOMoidea,  described  from  a  male. 


ARCTOPHILA.* 

Arctophila  Scliiiier,  Wicii.  Entoni.  Mouatscbr.,  iv,  S«15,  1860;  Fauua  Austr.,  U 
331. 

Large,  thickly  pilose  species;  black,  but  through  the  pile  light  in 
appearance.  Very  similar  in  structure  to  Sericomyia,  but  distinguish- 
able by  the  thick  pilosity,  by  the  form  of  the  face,  wuich  is  straight, 
conical,  descending  much  below  the  eyes,  not  truncate,  but  pointed  at 
the  tip;  the  abdomen  is  shorter,  broader,  and  more  convex  above;  the 


i  IV 


!  ! 


''"ApKTOi,  uear,  aiid  <pi'Ao(,  dear. 


168 


BULLKTFN    31,    UNITED    STATES    NATIONAL    Ml'SEUM. 


hind  femorii air  thickened,  and  botli  tlie  femoraand  tlie  tibiso  are  bent 
Wingf*  witii  a  brownisli  spot ;  tin;  tliini  longitudinal  vein  considerably 
bent.    Type  of  genus  A.  bomhifonnis,  Europe. 

Arotophila  flagr&ns.     (I'lulo  VII,  i'tati.  r>,  'm,  '>!>.) 

ArctophUa  Jlugranii  0*%i'\\  cjuckon,  bull,  liiitl.  ISoc.  Nat.  Soi.,  ili,  Gt);  West.  Dipt,, 

•sa:,. 

Habitat. — Colorado  (O.  8.),  New  Mexico! 

(J.  Lengtii,  13""".  Face  wax  yellow.  Cheeks  black.  Antennae:  ba- 
sal joint  brownish  ;  third  joint  reddish^  the  plumose  arista  black.  Tho- 
racic dorsum  densely  clotlied  with  yellowish  hair,  through  which,  liow- 
•;ver,  the  metallic,  brownish,  coppery,  ground-color  is  apparent;  pleiuaB 
black,  in  the  middle  with  a  stripe  formed  by  yellow  pile.  Abdoineu 
with  long  yellow  pile  at  the  base  and  on  tlu-!  sides,  with  reddish  hair  in 
the  middle  and  at  the  tip;  between  the  hairs  the  black  metallescciit 
ground-color  is  apparent.  Legs  black  ;  front  tibia)  beset  on  the  inside 
with  short  golden  yellow  hairs;  three  basal  joints  of  the  four  posterior 
tarsi  brownish-red.  Wings  with  a  slight  grayish  tinge;  a  brown  spot 
limited  by  the  fourth  longitudinal  vein,  the  costa,  the  small  cross-vcMii, 
and  the  origin  of  the  third  vein  ;  the  latter  vein  is  more  deeply  sinuate 
than  in  A.  bombi/ormis. — Osten  Sacken,  1.  c. 

Seven  male  specimens  from  New  Mexico  (G.  F.  Gaumer,  E.  Keen)  are 
suflQciently  well  described  by  the  above.  The  species  is  easily  recog- 
nizable. 


cross  veir 


P 


Ui 


ERISTALIS.* 

JSriatalia  Lutreillo,  Hist.  Nat.  «li'.t  Crust,  ft  Ii  *.,  xiv,  303, 1804. 
Erintalinua  Knndiim,  Dipt.  Ital.  I'roilr.,  ii,  40,  1H.")7. 
Erialalomyia  Koinluni,  il)i<l. 

Moderate  sized  to  large  species,  often  more  or  less  thickly  pilo8e,fre- 
quently  nearly  bare,  of  a  ])reviiiling  black  or  browi>ish-black  color,  usually 
with  morcor  less  yellow  on  the  abdomen.  IJead  hemispherical,  but  little 
broader  than  the  thorax.  Antennae  short,  situated  upon  a  slight  con- 
vexity of  the  front,  first  two  joints  short,  third  joint  oval;  arista  basal, 
bare,  pubescent  or  loosely  plumose.  Facie  more  or  less  pilose  and  polli- 
no.se,  but  slightly  excavated  in  protile  below  the  antennae,  straight,  ob- 
tuse below,  not  produced,  near  the  middle  with  a  small  prominence. 
Cheeks  broad.  Eyes  more  or  less  i)ilose,  rarely  nearly  wholly  bare,  con- 
tiguous in  the  male,  or  at  least  only  separated  by  a  sutural  space  (in 
some  exotic  species  separated  by  a  distinct  interval).  Thorax  large. 
Scutelium  usually  more  or  less  translucent.  Abdomen  convex,  elliptical, 
longer  and  broader  than  the  thorax.  Legs  strong,  the  hind  femora  some- 
times considerably  thickened  or  dilated,  the  hind  tibiae  more  or  loss, 
sometimes  considerably  arcuated.     Marginal  cell  of  wing  closed ;  third 


'Eriatalis,  a  precious  stone. 


SYNOPSIS   OF   NORTH   AMERICAN    SYRPHID^..  169 

longitudinal  vein  stronj^ly  bent  into  the  first  posterior  tell;  anterior 
cross- vein  near  the  middle  of  (liscal  oell,  oblique. 

1.— SculoUuin  1)1'  tliu  Htiiiii)  color  UN  tlit*  thoriix,  ulidonicn  without  li^bt  markings, 
wLolly  bhiniiifj ;  eyos  Itaro  (ix(;t'i)t  on  iipixTinost  part)  witl>  Hinall  round 
dark  spotH ;  ilorHiiin  of  thorax  in   t'cnialo  dlHtinctly  vittato;  arJHta  hare, 

aeueus 
Scntolhim    moro  or  Iohh  ydlowisli  or  rt'ddinh ;  oycs  distinctly   pilosp,   not  so 

Hpotti'd 2 

2.— Third  Hf^jrni-nt  of  iibdoincn  wiiolly  Nliinin;;,  without  opaque  spots  or  bauds    .     3 

Third  uhdoininal  s(><^nirnt  witli  opii(|uo  inarkin^s 6 

3.— Tliird  joint  of  antunnio  lai'iu;",  red;  arista  liaro,  Tliinly  i)iIo8e  species;  second 
segment  of  alxlonirn   with  reddish  sido  s]i(itH  and  a  shining  croMs-band  ; 

wiiif^s  on  tli(0>asal  two-tliirdN  in  front  Ijrowii compaotus 

Third  joint  of  autennai  of  nsiial  size  ;  winj^s  with  or  without  brown     ...    4 
4. — Pile  of  eyes  not  conlincd  to  a  vf-rtical  striim  ;  tlie  b'ack  of  second  abdominal  seg- 

incnt,  at  Ifast,  in  part  opa(|ne 17 

Pile  of  eyes  mostly  conlincd  to  a  vertical  stripe;;  abdomen  wholly  shining;  large 

species 5 

5.-rHoney-bee  like  in  appearance  ;  njoderatoly  pilose  ;  base  of  tibiio  yellowish,  pris- 

terior  tarsi  blackish ;  arista  nearly  l)are     .     .     • tenaz 

Humble-bee  like  in  appearance  ;  thorax  and  abdomen  with  thick  long  pile  (on 
the  dorsum  of  thorax  sometimes  blackish  pilose,  var.  tmianontoinm) ;  arista 

plumose,  hind  tarsi  red flavipes 

6.— Thorax  with  one  or  more  disiinct  light  dusted  bands;  frout  in  female  narrow 

above 7 

Thorax  without  such  transver.se  bands 11 

7.— Hind  femora  slender ;  frontal  triangle,  aiul  front  below  (  $  ),  with  black  pile    .    8 

Plind  fenmra  dilated  or  thickened 9 

8.— Arista  bari> ;  yellow  spots  of  second  segment  touching  the  front  border  in  their 

whole  extent atrimanuB 

Arista  hrielly  pilose;  the  opaquo  black  extends  nearly  the  whole  width  of  the 

front   border transversua 

9.— Third  segment  of  abdomen  with  a  shining  cross-hand  ;  dorsum  of  thorax,  besides 

the  front  border,  with  two  complete  light  cross-bands;  arista  bare     .     10 

Thehlaciv  of  th(!  third  ahdoniinal  segment  wholly  opaque  ;  dorsum  of  thorax  with 

one  complete  cross-band  along  the  suture;  i'ro..tal  triangle  thickly  white 

pilose alblceps,^ 

10. — Second  abdominal  segment  broadly  opaqm*  black  in  the  middle;  lower  piirt  of 

front  not  wholly  white  pilose albiceps$ 

Second  abdominal  •.egment  narrowly  black  in  the  middle;  pile  of  lower  part  of 

the  front,  or  the  frontal  triangle,  wholly  white vlnetorum 

11.— Thickly  pilose  species 19 

Moderately  pilose  species 12 

12.— Third  abdominal  segment  with  a  posterior  velvety  black  cross-hand  not  inter- 
rupted in  the  middle 13 

Third  abdominal  segment  with  an  interrupted  band,  or  none 16 

13.— Third  segment  of  abdomen  broadly  and  conspicuously  yellow  on  the  sides,  join- 
ing the  yellow  of  the  second  segment,  the  black  of  the  second  segment 
wh(dly  opaque,  not  extend. ng  outwards  on  the  sides  behind  ;  the  third  seg- 
ment with  an  opaque  spot  in  front,  and  an  abbreviated  cross-band  heliind  ; 
fourth  segment  metallic;  eyes  briefly  contiguous  in  male  .  .  .  .  Brousi 
Third  segment  uot  conspicuously  yellow,  the  posterior  opaque  fascia  of  second 
s?>gmrnit  behind  reaching  toward  the  lateral  margin  ;  eyes  broadly  ccmgu- 
ous  in  nnile 14 


/    'f 


'I' 


ii  I  '■■ 


::it 


I  'i 


I 

M 
ru5 


•*i- 


1' 


if 


'' 


160  BULLETIN   31,    UNITED    STATES   NATIONAL   MUSEUM. 

14. — FiDiil  of  fi'iiiaht  naiTiiw.  iJiTp  MiiiHli  lilaik  ;  sciitrlliiiii  Inil  wry  little  liylitcr; 
si'coDil  M';4ni('iit  (if  ali(l(iiii('ii  will)  iiiciMispiiMioiiN  hIiIi' h|i<i|h;  1  liir<l  aiiill'diirtl, 

sc;;iii('iils  Willi  a  ii.'irniw  :iiitiTior  vrlvi'ly  t'ascin, saxonin 

Fi'diit  III' I'ciiiali'  lii'oail ;  <l()rf<iiiii  of  tlioiax  iHil  sliiiiiiiji  hlccl-lilin'     •     •     •     .    15 
15. — Li;;lil('r  iiiarUiii;;^  of  aliilniiicii  iiHiiallv  i|iiit<-  ilisiinct  ;  tliird  iiiiil  I'uiii'tliNcj^iiieut, 

Willi  u  Niiiall,  ('liiii<{itti<,  u|iai|ii(t  l)Iack  N|ii)l  ill  IVoiit hirttii 

Li^^lil   inarkiii;;^  oli.solfii',  lliinl  ami  rtmitli  si'^ririfiits  without  opatiiw  aiilnidr 

"l""^ I  inornatus 

16. — Third  Hf;jiiuMit.  of  abiloiiicii  witii  an  antcrinr  Hpot  and  ii  poHterior,  oi)a(Hi<'  cniw 

band  ;  the  o])a(|iit>  of  hccoiuI  Koguicnt  with  a  Ninall  triaugiilar  Nhiuiii;;  .spd' 

behind;  foiiith  Negiuent  with  iiii  oval  Hpot  in  front    ....     dimidiatus 

Third  He,nnii'nt  with  one  or  two  Hiiiall  opufiue  Himlsonly,  without  inislerinr  cnis*. 

band  ;  or  wholly  Hhining 17 

17.— WingM  c'oiiHpieuously  dark  eoloreil  on   the  outer  part  in  front ;   hind  leinma 

thickened hortorum 

WingN  hyalines  femora  not  thickened 18 

18.— Second  Nejjnient  of  abdomen  with  yellow  lateral  triaiiyles  and  a  posterior,  iiiiir 
rnpted  or  Hiiliinterrui)t('d  velvety  cross-band;  jioBterior  margin  ofseginpnts 
2-4  yellowish  white  with  a  fringe  of  ]ial«*  golden  j)ile  ....  latifrons 
Second  segment,  except  the  oljsoletu  or  nu^tallic  side  spotH,  which  extend  the 
whole  It'iigth  of  the  segmcuit,  velvety  black;  thiid  usually  with  a  velvety 
triangle  in  front,  the  fourth  with  a  similar,  but  very  siuall  one;  theytj. 
lowish  while  hind  borders  fringed   less  cimspicuously   with  light  lolorrd 

])ile Brouai 

19. — Second,  third,  and  fourth  .segments  (d' aiidomeu  broadly  reddish  yellow  on  ilir 
sides,  leaving  a  narrow  black  stripe,  which  is  wholly  opaque  on  thesecuml 
segment,  and  in  front,  at  least,  on  the  thinl  sciginent ;  eyes  narrowly  HO)iii- 

rateil  (  J  ) montamia 

.Second,  third,  and  fourth  segments  not  broadly  yellow  on  the  sides    ...    20 
20. — Third  segment  with  two  o|iaque  circular  s])ots  near  tlui  middle  of  the  segini'iii. 

pilosuB 

Third  segment  with  a  jiosterior  oi)a(iue  cross-band 21 

21. — Posterior  oi)a(iue  cross-band  of  third  segment  narrow;  fourth  segment  usually 

with  a  small  opaipio  spot  in  front    .         occldentalis 

I'ostorior  cross-baud  broad ;  fourth  segment  who'ly  shining ;  more  thickly  pil(i»e 
species Bastardl 

For  other  .si)ecies,  see  descriptions. 

Sristalis  tenax.    (Plate  VII,  figs.  7,  7a,  Ih,  Ho.) 

Muaoa  tenax  Linud,  Fauna  Suecica,  1799  (1761). 

Mu8ca  porcina  Dcgeer,  lus.,  vi,  45, 1. 

Cono/)«  vuijiarw  Scopoli,  Eutom.  Cam.,  354,  9G0. 

Conopa  fuaoHB   Scopoli,  1.  c,  355,  901. 

Elophilua  tenax  Lutreillu,  Geu.  Crust.,  iv,  'MA. 

Syrphua  tenax  Fabriciiis,  Spec.  Insect.,  ii,  425;  id.   Entom.  Syst.,  iv,  288,  36; 

Fallen,  Syrph.,  iiC,  17;  Zetterstedt,  Dipt.   Scand.,  ii,  661,7;  id.  ibid.,  viii, 

3113,  7. 
Eriatalia  tenax  Fabricius,  Syst.  Autl.,  2;18,  24;  Mcigeu,  Syst.  Beschr.  iii,38.'),  4; 

Macquart,  Hist.  Nat.  Dij)t.,  1,  "01,  21 ;  Schiuor,  Fauna  Austr.,  i,  334;  Burgess, 

Psycho. 

Habitat. — Europe,  Asia,  Airiea  ( Anct.),  North  America,  Japan  ! 
^  ,  ?  .     Length,  12  to  14""".     Eyes  with  dark  pile,  more  abundant  near 
the  middle,  in  the  form  of  au  elongated  vertical  stripe  or  ellii)8e,  tlie 


mi<l<!'"  ol 
neatli  dci 
facial  ,stf 
ill  tiic  let 
lilai'k  pil 
liaso,  nca 
\v'(h  .vcll( 
brownish 
soinetiiiu' 
triatigU'   i 

llU'llt   SOIIl 

Le;'.s  l)rov 
third  of  a 
these  tibii 
tatar.si  ye 
the  disk 
Xuinerii 
The  u\o> 
of  its  lir.st 
never  lieei 
asIJaroii  ( 

(MIS    lildllil 

have  seen 
l^iiey's  (!()] 
and  pie.sit 
(•ailing  thii 
the  .specie.*' 
wliere  the^ 
has  been  ii 

Eristalis  aet 

Si/rphn 
Fan  I 
Concps 
Erhtal 
2;  M 
Eristal 
Eriatal 

Uabita*.- 
Syriii. 

<J,9.  L 
spotted  wit 
top.  Face 
tubereh^  an 
joint  yellow 
and  abdoiii 
I'einalti  witl 
Scutellum  ( 


SYNor'SIS    OF    NORTH    AMKHICAN    SYKIMIIIM;. 


IGl 


midd'M  of  wliicli  is  less  pilose.  Fare  aii*l  fVoiil  iiiostl.v  coiici-alnl  bo- 
iieatli  (U'liso  y(>'.i!o\visli  pollfii  and  Nimilar  coloicil  pile  ;  u  Itruad  liirdiau 
taciiil  strip!'  and  the  clict'lvs  shilling'  hiack;  tiii>  iippor  part  of  tlu>  Iront 
in  tilt'  i'ctiialc  and  a  spot  above  the  anfenniu  in  hotii  sexes  bhick,  with 
blai'li  pile.  Antenna-  browtiish  bhiek  ;  aiista  reihlish,  darker  at  the 
hasp,  ni'arl.v  bar«'.  Tliorax  lilaek,  but  little  shiniiijj;;  dorsum  covered 
w'tli  yellowish  poUeii  and  moderately  abundant  yellow  pile.  Ab<Iomen 
l)r(»\vnisli  black,  nearly  bare,  wholly  s!iinin;i  ;  the  second  sediment,  and 
sometimes  the  third,  with  narrow  posteiior  leddish  nmrj^ins;  the  usual 
triaiif^lc  slender,  inconspicuous,  obseur»'ly  reddish  yellow  ;  third  seg- 
iiu'iit  sometimes  with  a  similar,  small,  less  distinct  spot  on  the  sidcH. 
Le;.'.s  browidsh  black,  or  black,  with  yellow  pih' ;  tip  of  femora  and  basal 
third  of  anterior  an<t  middle  tibiiu  lij^^ht  yellow,  the  distal  portion  of 
these  tibiic  and  all  of  the  hind  tibiae  blackish  or  brownish;  middle  me- 
tatarsi yellow.  Winjjs  hyaline,  a  small  spot  at  lip  of  au.xiliary  vein; 
the  disk    ometimes  broadly  but  faintly  clouded. 

Xumentus  spetnmens. 

The  most  remarkable  thin^'  in  connection  with  this  insect  is  the  duto 
ofits  tirst  discovery  in  America.  Prior  to  1871  or  1875  the  speities  had 
never  been  reco;riii/ed  by  dipterolo'^ists,  alth<)u;:li  such  an  able  collector 
itsljaron  OstenSacken  had  sj)eiit  many  yeais  in  the  study  of  our  dipter- 
ous iauna.  At  present  it  is  very  abundant  in  New  Mn^laiid,  an<l  I 
liave  seen  specimens  from  the  Central  and  Pacific  Slates.  In  Professor 
Piley's  colli'(;tion,  however,  then*  is  a  specimen  bearing?  the  date  of  IS7(>, 
and  presuimibly  captured  in  the  Wesleiii  Stati's  somewhere,  I'pon 
calliii}^  this  j;entleman's  attention  to  the  specimen  he  assured  me  that 
tilt' si»ecies  had  Ion;;' been  familiar  to  him  about  privies  as'd  outhouses, 
where  they  are  known  to  breed.  It  seems  probable  to  me  that  thespe(;i\\s 
has  been  in  this  countiy  for  many  years,  but  had  never  been  recognized. 

Eriatalis  aeneus. 

SyrphuH (tineiin  Fiilnicnis,  Knt.  Syst,.,  iv,  :?()'i,8H  ;  Fallon,  Syrpli.,  '2^,  -j-j;  Pmizt.T, 

Fauna  Germ.,  &i,  13  ;  Zetterstedt,  Dijit.  Scaud.,  ii,  (J(id,  14. 
Conopii  (FHOi*.?  Scoindi,  Eiit.  Cam.,  :i.'>0,  liy.  9(57. 
Erintal'iH  wiiens  l<''altrieius,  Syst.  Ant!.,  "244,  57;  Meif^cn,  Synt.,  Bt'Kclir,  iii,  1184, 

'i;  Maequart,  IliHt.  Nat,  Dipt.,  i,  fiOC,  Ki;  ScliintT,  Fauna  AiiHtr.  Dipt,,  i,33:S. 
Erisfalis  ciiproviltatiis  W'wdL'innuU,  Amsh.  Z\v,  Ins.,  ii,lil0,54. 
Eriatalis  nhicirux  Harris,  Ins.  Injur,  to  Vcjit't.,  iird  imI.,  (iO'J;  WalkiT,  List,  iii,  611. 

Uabita*. — Europe,  North  America!,  Al^-iers,  Canary  Islands,  Malta, 
Syria. 

^,9.  Length  8  to  10"'"'.  Dark  metallic  green,  wholly  shining.  Kyea 
spotted  with  small  round  dots,  nearly  bare,  very  slightly  pilose  near  the 
top.  Face  and  front  with  grayish  pile  and  i)ollen,  u  small  spot  on  the 
tubercle  aiul  the  cheeks  narrowly  shining.  AnteuuiU  brown;  the  third 
joint  yellowish,  often  the  first  two  joints  likewise;  aristii  bare.  Thorax 
and  abdomen  with  obscure  yellowish  i)ile.  Dorsum  of  the  tliorax  in  the 
female  with  five  grayishwhitc  stripes,  the  nuddle  one  slender,  linear. 
Scutelhun  of  the  same  dark  metallic  green.    Tibiai  at  the  base,  some- 


i 


I 


102 


IHJI,M;TIN    :tl,    INJTED    STATKS    NATIONAL    Ml'SKUM. 


t 


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't 


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timt's  for  luMirly  Inilf  tiM'ir  l«'n;,'tli,  liRlit  yrllow  ;  inid(lk>,  HometimeH  all 
thf  int'tntarsi,  .v<*IIo\viMli ;  tin'  Iciiiorii,  cxci'pt  tho  tip,  black;  distal  por. 
tioii  of  tibirt?  blackish  brov.Mi.     VViiij^N  liyaliji*;. 

NmiHTOIlS  S|MM'illlIM  s. 

Eristalii  hirtus. 

Hi'iHlahx  hlriiis  Lot-w,  Ontiir.,  vi,  (1(5;  OHten  .Sackuii,  WcHt.  Dipt.,  dllTi;  Willis- 
ton.  I'ri.c.  Am.  IMiil.  Soc.,  l^f^•J,  ai'J. 
h'rlntiiliti  liwpornliH  Tliomson,  l)i|it.  I'.iif?.  Rcnii,  4'.W),  77. 

ffahitnf, — \Vji.slii!i<,'t(m,  On-jjo?!,  ('iilifoniia,  Colonulo,  Wt'slcni  K;iii- 
huh! 

5,5.  Lt'iitrth,  H)  to  l.'»""".  Face  black,  more  or  less  coiiccalcil  he. 
iicatli  a  soinctinu'N  dcii.sc  ;,'rayi.sli  or  nMldisli  pdllcii,  the  pile  whitish.  A 
narrow  stri|»o  in  the  iiiiddlt'  and  the  chock.s  l>ar(',  shiiiiiij;.  Below  tlic 
aiitcnnal  process  the  f.ice  is  nearly  vertical  to  tlie  tip  »)f  the  tubercle. 
Frontal  ■iafi'rle  (convex,  with  ohscnre  yellowish  pilf.  Myes  in  the  main 
liroadly  contifjuons ;  in  the  female  the  front  is  convex  ami  very  broad, 
tho  Hi<les  convt'rj,'in^'  but  very  .sli;,Hitly  on  the  upper  half;  thickly  yel- 
lowish pollinose,  less  <lense  in  tiie  middle  and  upper  part,  so  that  the 
shitnu};  jjronnd  color  api)ears;  thickly  clothed  with  yellowish  pile.  An- 
tenii.T.  black  ;  arista  reddish,  l»riet1y  pilose  near  the  base.  Thorax 
black,  shiin'ny.  rather  thickly  clothed  with  the  same  (d)scurc  yellowish 
pile.  Scutelliun  sub-translucent  yellow,  black  at  the  base.  Abdomen 
black  ;  the  sides  of  the  second  se};i:ment  with  a  lar^-e  tiian;rular  sjtot, 
usually  yellowi.sh,  sometimes  quite  yellow,  in  otheis  (udy  metallic;  the 
sejjment  elsewhere  oi)aqne;  third  se^iinont  with  an  o]ta(pie  bhutk  fascia 
behind,  not  interrupted,  and  a  small  trianj^ular  spot  in  front;  remain- 
der of  the  third,  and  the  Ibllowin;;'  se{;nients,  shining'  black,  except  tii;it 
the  fourth  s<';jrment  usually  has  a  very  small  trianj;ular  opacjue  spot  in 
front:  pilo  short,  obscui'e  yellowish,  bhu^k  on  tln^  ()pa(]ue  i)ortioiis; 
second,  third,  and  fourth  sej,Mnents  usually  mari^iiu'd  behind  with  lij^lit 
yellow,  in  soni«'  specimens  almost  wholly  wanting.  Le^s  black;  ri])  of 
femora  and  base  of  tibiiw,  the  middle  tibiic  almost  wholly,  and  tlie  tirst 
two  joints  of  the  nddtlle  tarsi,  yellow.  Wings  hyaline;  in  some  sj)eci- 
mens  with  a  darge  faint  1  cownish  spot  in  the  middle  of  the  winj,'. 
Thirty  specimens. 

This  species  varies  imich  in  the  yellow  coloratiou  of  the  abdomen. 
According  to  Osteu  Sacken,  the  specimens  with  obsolete  and  sub-obso- 
lete yellow  spots  on  the  sides  of  the  second  segment  seem  to  come  from 
higher  altitudes. 

EilBtaliB  dimidiatus. 

ErMaltH  dimidiatus  Wiedemann,  Anas.  Zw.  Ins.,  ii,  180,  41. 

ErintaliH  itttlexim  Walker,  List.,  etc.,  iii,  r)17. 

ErintaliH  nif/er  Macqnart,  Hist.  Nat.  Dipt.,  i,  505,  15. 

EriHtaVm  U Uirminierd  Macqnart,  Dii)t.  Exot.,  ii,  2,  55,  38  (male). 

EviHlaliH  chahjhens  Macqnart,  Dijit.  Exot.,  ii,  2,  55,  ^9  (female). 

Erintafis  inrimmlis  Macqnart,  Dipt.  Exot.,  4e  Siippl.,  139,  64  (male). 

Habitat. — xYtlantic  States,  Kansas ! 


SYNOPSIS    OK    XOKTH    AMKUICAN    SYR1MII1»:. 


1G3 


i ,  9  .  Iit>ii;;tli,  10  to  l.'V""'.  Tiu!!'  (U'lisoly  clothed  with  whitish  pol- 
III)  and  piU>,  whtMi  duiiudud  the  ground  color  soiiiewiuit  reddish,  in  the 
middle  with  a  larjje  oval  shining  spot  »)n  the  tubercle,  and  the  cheeks 
aiNO,  shining  black  ;  in  prolUe  concave  below  the  antenna',  the  tubercle 
lar^M'.  Antennib  black,  the  tliird  Joint  a  little  brownish  or  reddish ; 
arista  reddish,  very  briefly  |>ilose  near  the  base.  Front  iu  female 
fldtlit'd  with  yi'llowishwhitisli  pollen  nnd  pile,  leaving;  a  median  stripe 
Itiown;  on  the  upjier  part  u  «nndl  vittula  in  the  middle,  a  larjier  oval 
sjiot  in'artheeyes,iind  theocellii.  ,.(it,  blai  k  with  black  pile.  Kyes  pilose 
(in  tiie  u|)per  part ;  frontal  trian;;!*  not  niu(!li  lon;;er  than  the  suture 
bctwt't'U  till' male's  eyes,  11  liltli'  shiniii;;  in  the  middle.  Thorax  with 
slidit,  not  abundant,  li};ht  (tolored  i)ilt';  shiiMn;;  jjreenish  black  with  two 
(ir  tlirt'«'  indistinct,  somewhat  o|)a(|ue  stripes.  Scutellum  yellowish; 
|ii!t'  mostly  blackish  above,  yellowish  on  the  border,  rieuno  with  more 
abundant  yellowish  pile.  Abdomen  sliinin^j:  greenish  black;  the  usual 
trian;;ular  spots  on  the  second  se;;inent  sometimes  yellowish,  usually 
luotallic  shiinng,  not  (Mtntijruous  in  the  middle,  elsewhere  the  color  is 
opaque  velvety  black  with  a  shiidnj;  metallic  spot  in  the  middle  behind ; 
third  sej,'ment  with  three  opa(pu>  siK)ts,  an  elonjijate  one  on  each  sid(^ 
bt'liind,  au«l  an  oval  median  one  iu  front,  sometimes  there  is  a  yellow- 
ish spot  on  the  .sides;  fourth  segnicut  with  an  oval  nu'dian  opaque  spot 
ill  front;  hind  marj>iii  (»f  tiie  second,  third,  and  fourth  .sefjments  xcl- 
low,  sometimes  iieaily  obsolete ;  j)ile  very  short,  on  the  first  se;xmt'iit 
loiij;or,  whitish,  on  the  opaiiuc  jiortioii  black,  elsewhere  more  ,\e!lo\viNli. 
Li't^s  black;  basal  portion  of  all  the  tibi;e  yellowish  white.  Wiiij^s 
liyaliiK',  small  stiyiiiatic  sjiot  brown,  a  brownish  tint  often  near  the  mid- 
lilc  of  the  will};;. 

Fifteen  sjieciineiis,  Connecticut,  District  of  Columbia  (I'atton),  White 
Mountains  (Dimmock,  1417),  Kansas. 

About  the  synonymy  of  Viler minhri  and  vliali/brit.s  there  can  be  no 
doubt,  the  descriptions  aj^ree  jterfectly,  and  Osten  Sacken,  who  ex- 
aiiiiued  the  types,  pronounced  them  to  be  the  same.  IJ.  niijcr  iunl  in- 
muralis  of  the  same  author  differ  only  in  that  the  opacpie  spots  of  the 
third  abdominal  segment  are  not  mentioned ;  nevertheless,  the  synonymy 
is  uot  doubtful. 


•  li 


EriBtalis  sazorum. 

Kristalis  saxorum  Wiedomann,  Auss.  Zw.  InB.,ii,  158;  Macquart,  Dipt.  £xot.,ii, 

2, :«,  5. 
Eristalin  pervagus  Walker  (Harris),  List,  etc.,  ill,  618. 

ffaftiVflf.— Massachusetts,  Connecticut,  North  Carolina, Pennsylvania! 
Georgia. 

^ ,  $ .  Length  10  to  13?™.  Resembles  dimidiatun,  but  is  at  once  dis- 
tinguishable by  the  third  segment  of  the  abdomen  having  an  entire 
posterior,  velvety  cross-band,  by  the  front  in  the  female  being  narrowed 
above,  and  by  the  presence  of  a  distinct  brown  spot  on  the  wings. 


V 


164 


UULLETIX    31,    UNITED    STATES    NATIONAL    MUSKUM. 


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ii!:!' 

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1 


Face  eonceak'd  beneath  ileusc  wiiitisli  or  yellowish  pollen  and  whitish 
pile,  concave  below  the  antennic  ;  a  larjj;e  oval  spot  connected  with  the 
narrow  oral  margin,  and  the  cheeks,  shiniuj^'  black.  Front  in  female 
distinctly  narrowed  toward  the  vertex,  at  the  narrowest  part  only  a 
little  more  than  half  as  wide  as  at  the  base  of  the  antennic;  in  well-pre- 
served si)e(;iniens  dusted  ou  the  sides,  more  li<>htly  in  the  middle,  leav- 
ing the  vertex  and  just  above  the  antennae  shininfj,  in  the  middleasleu- 
del'  l)rown  stripe  and  above  on  each  side  an  oval  black  sjtot ;  i)ile  above 
blackish,  below  whitish.  Frontal  trianfjle  with  lonj^er  yellowish  i)ih'; 
shining'  in  the  middle.  Eyes  nearly  bare,  the  pile  beinj;  short  and  con- 
lined  to  the  upper  part.  Autcniiic  brcwnisli  black,  third  joint  some- 
what reddish  :  arista  red,  bvieliy  pilose  toward  the  base.  Thorax  a  deep 
blue  black,  shining';  pile  light  yellowish,  short,  not  abundant,  but  more 
so  on  the  pleura'.  ScutelluiM  scarcely  reddish  above.  Abdomen  shiu- 
ing  bluish  black  ;  the  second  segment  on  the  sides  sometimes  yellowish, 
and  in  the  same  specimens  sindlar,  but  more  faintly  colored  sjmts  ou 
tlu"  sides  of  the  third  segment;  the  shining  fascia  of  the  second  segment 
interrui)ted  in  the  male,  entire  in  the  female,  in  front  narrowly,  behind 
broadly  opaque  black,  without  a  shining  trianguuir  spot;  third  seg- 
ment very  narrowly  in  front,  more  broadly  behind  with  entire  velvety 
fasciaj;  fourth  segment  with  a  black  fascia  behind;  lilth  segment 
in  female  and  the  hypopj'gium  in  male  wlolly  shining;  the  second, 
third,  and  foi.itli  segments  very  narrowly  yellow  behind.  Legs  black; 
the  base  of  hind  femora  in  the  female  and  sonu^imes  so  in  the  male,  tha 
basal  half  of  anterior  and  ])osterior  tibijB,  rather  more  than  half  of  the 
middle  tibitc,  and  the  basal  joints  of  the  middle  tarsi,  yellow.  Win^s 
liyaline,  the  immediate  base,  and  a  large  spot  near  the  middle  coveiing 
the  cross- veins,  brown  ;  in  some  specimens  the  brown  of  the  middle  is 
confined  to  a  narrow  fascia  across  the  base  of  the  discal  cell  and  origin 
of  the  third  vein. 

Thirty  specimens. 

Eristalis  latifrous. 

Eriatalis  latifrous  Loevr,  Centur.,  vi,  65. 

ErMalis  aiipator  Osten  Sackeu,  West.  Dipt.,  336 ;  Willistou,  Proc.  Am.  Phil.  Soc, 
XX,  319.  ^ 

Habitat. — California,  Kansas,  Arizona,  Colorado,  New  Mexico,  Texas! 

S  ,9 .  Length,  9  to  14"""'.  Face  a  little  concave  below  the  auteuuffi, 
concealed  beneath  dense  yellowish-white  jjollen,  and  the  pile  of  the 
same  color;  in  the  middle  with  a  rather  broad  shining  bare  stripe;  the 
cheeks  also  bare  and  shining  black.  Antennae  black,  third  joint  browu- 
ish-black  ;  arista  reddish  yellow,  bare.  Eyes  pilose,  contiguous  in  the 
male,  the  suture  between  them  rather  short  (about  half  as  long  as  the 
interval  between  the  apex  of  the  frontal  triangle  and  the  root  of  the  au- 
tennai);  front  in  female  rather  broad,  the  sides  a  little  convergent  id)()ve, 
grayish  pollinose,  beset  with  dense  grayish-white  pile,  shining  along 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHID-S:. 


1  ().') 


tbe  middle,  especially  below,  the  vertex  darker.  Thorax  greenish- 
black,  unicolorous,  shiniii};,  beset  with  yellow  or  yellowish  pile,  sonie- 
tiriies  more  orange-colored,  denser  on  the  pleune.  Scutellum  re«ldish- 
brown,  translncent;  second  abdominal  segment  with  a  yello'v  triangle 
of  the  usual  sbape  on  each  side,  sometimes  brownish-yellow ;  an  opaque 
black  cross  ban<l  on  the  anterior  margin,  another  one  along  ihe  poste- 
rior side  of  the  yellow  triangles;  the  latter  is  interrupted  or  subinter- 
rupted  in  the  middle,  oblique  on  each  side,  and  not  reaching  the  lateral 
margins ;  a  smooth  bluish-black  space  is  inclosed  between  the  two 
cross-bands  and  the  triangles ;  a  narrow  shining  triangular  spa(!e  be- 
tween the  bind  cross-band  and  the  yellowish-white  posterior  margin  of 
the  segment,  which  bears  a  fringe  of  pale  golden-yellow  pile;  the  third 
and  fourth  segments  have  the  same  pale  yellowish  ])OSterior  margin 
and  fringe  of  pale-golden  pile;  on  the  fourth  segment,  however,  the 
fringe  is  broader,  an<l  takes  in  the  whole  posterior  half  of  the  segment; 
on  the  i)osterior  half  of  the  third  segment  there  is  on  each  side  in  the 
male  usually  an  elongated  o])a(iue  black  streak  ;  the  anterior  margin 
of  the  third  segment  has  a  narrow  pale  border,  as  if  prolonging  the 
liind  margin  of  the  preceding  segment.  IIypoi>yginin  black.  Legs 
black  ;  tip  of  the  fenu>ra  and- basal  half  of  the  til»iic  yellowish-white; 
on  the  middle  pair  three  fourths  of  the  tibifc  and  tlie  base  of  the  tarsi 
are  of  a  pale  color.     Wings  hyaline  ;  stigma  small,  brown. 

Six  specimens  from  California  (Morrison),  the  male  of  which  lacks 
tlie  velvety  lateral  spots  on  the.  third  segment  ;  a  single  male  from 
Western  Kansas  and  a  female  from  Topeka,  Jvans.  (I'openoe) ;  also, 
seven  males  and  three  females  from  Colorado  and  live  from  Arizona 
(Professor  Comsto(rk).  Since  writing  the  above  I  iiave  found  the  spe- 
cies very  abundant  on  the  Kansas  jtlaius  in  August. 

Eristalis  Brousi. 

lu-inlalia  AiKlrochin  Ostcii  Sackpii  (not  Walker),  West.  Di[)t..  :j:{7  ;  Cat.  Di])t.- 

noto  'i-r.),  i>.  UAd. 
Eristalis  f  Meiijenii  (VViod.)  VVillistmi,  Pioc.  Am.  Phil.  Soi;.,:U'.»  U'lali'). 
Eristalis  Jlroiisii  Willintoii,  ilii(l.,;V^;{  ^fcinaltO- 

Habitat. — Canada,  New  England,  Washington  Territory !,  Utah, 
Alaska  (O.  S.). 

(J ,  $  .  Length,  10  to  12""".  Face  black,  shining,  thickly  clothed  with 
yellow  i)ollen  and  pile,  leaving  the  tubercle,  the  oral  margin,  and  the 
checks  shining  black.  Frontal  triangle  a  little  shining  along  the  mid- 
dle; iu  the  female  the  front  reddish  pollinose,  more  shining  above  the 
antennae.  Antennie  black,  third  joint  .somewhat  reddish  ;  arista  red- 
dish, briefly  pilose  near  the  base.  Eyes  pilose,  in  the  male  contign()us 
for  a  short  distance  only;  posterior  lateral  orbits  white  i»ollinose.  Tho- 
rax black,  shining,  on  the  tlorsum  with  a  coppery  luster,  leaving  two 
«)|)a(]ue,  lighter  colored,  rather  broad  stripes,  reaching  from  the  front  to 
the  scutellum,  limited  by  three  narrow,  oi)a(pH',  black  stripes;  jtile  of  dor- 


t  1 


. 


!    ' 


166 


BULLETIN    31,    UNITED    STATES    NATION\L    MUSKl.:.! 


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suui  li{irlit  reddisli  yellowisli,  scarcely  apparent  Iroui  above;  pile  of  Uic 
pleunuNNhitish.  Scutelluin  snbtraiisluceut  yellowish  or  reudisli  on  the 
outer  part.  Abdoinon  in  the  male  as  follows :  first  segment  black ; 
second  segment  orange-yellow,  broadly  on  the  sides  and  narrowly 
across  on  the  hind  border,  elsewhere  opaipie  black ;  on  the  posterior 
part  the  black  includes  nearly  a  third  of  the  width  of  t';e  segment;  Die 
sides  a[)proach  each  other  a  little  towaids  the  front  and  then  at  nearly 
right  angles  extend  outward  along  the  anterior  marj^in  of  the  segment; 
the  Riteral  prolongations  are  convex  on  tlieir  hind  btn-ders  and  reach 
acutely  nearly  to  the  lateral  margins ;  third  segment  with  large,,  similar 
colored  si)ots,  confluent  with  the  yellow  in  front,  but  rttunded  on  the 
internal  posterit)r  angles  and  usually  not  quite  reaching  the  y<llow  of 
the  hind  margins;  across  the  middle  of  the  segment  a  shining  metallic 
band  interrupted  in  the  middle,  elsewhere  the  black  is  opaque;  fourth 
seguient  wholly  shining,  with  a  narrow  yellow  hind  nuirgin  and  souie- 
times  with  a  small  spot  of  opaque  black  in  front ;  hypopygiuui  shining 
black.  In  the  female  the  markings  are  rarely  like  those  of  the  male, 
chiefly  shining  black ;  the  second  segment  soruetimes  with  a  small  red 
dish  spot  on  the  side,  the  opaque  marking  as  in  the  male ;  the  third 
and  fourth  segments  sometimes  with  a  small  opaque  spot  in  front;  sec- 
ond, third,  and  fourth  segments  sometimes  rather  broadly  whitish  i)ol 
linose  on  the  hind  border ;  the  hind  margins  more  narrowly  reddish 
jellow.  Legs  black,  a  little  stout;  tip  of  feniora  and  base  of  tibia; 
reddish  or  whitish  yellow.  Wings  hyaline  ;  stigma  minutely  brownish ; 
in  the  female  with  a  largo  faint  brownish  spot. 

Twelve  male  and  six  female  specimens  from  Connecticut  and  an  equal 
number  from  New  York  and  Pennsylvania;  also  one  male  from  Toronto 
(Brodie)  and  one  from  Washington  Territoi'y  (Professor  Hagen). 

This  species  is  remarkably  like  I],  arbustorum  from  Europe  in  size, 
shape,  and  coloration,  but  a  careful  examination  discloses  ditt'erencos 
which  are  evidently  specific.  W  ith  E.  Meigenii  Wied.  ( Anss.  Z  w.  Ins.,  ii, 
177;  pi.  XV,  fig.  15),  from  South  Aujerica,  the  resemblance  must  be  even 
greater;  the  full  descirption  ai)plies  almost  perfectly. 

Osten Sackeu  observes  that  the  specimens  from  Yukon  River,  Alaska, 
have  the  arista  dark  and  the  velvety  spots  on  the  abdomen  somev'lmt 
ditt'erent. 

Eriatalia  montauus. 

Erhtalis  uioiitainis  Williston,  Pioc.  Am.  Phil.  Soc,  xx,  ',iM2. 
Hnhitat. — Wyoming ! 

S.  lj(Migtli,  11  to  12""".  Face  reddish-yellow  poUinosc,  and  white 
pilose,  on  the  sides  ;  the  median  stripe  and  broadly  on  the  cheeks  shin- 
ing black.  Frontal  triangle  black  in  the  middle,  with  yellowish  pile. 
Antenna}  black  ;  arista  reddish,  ])ubescent  near  the  base.  Eyes  wholly 
pilose;  approaching  each  other  in  front  of  the  ocelli,  but  not  quite  con- 


SYNOPSIS    OF    NOUTH    AMERICAN    SYRPHIDiE. 


167 


tigiKnis.  Face  distinctly  coiujavo  below  the  antenna}.  TLorax  clothed 
\vi>li  long  and  dense  sulpbui-yt'liow  pile;  from  above,  the  giouud  color 
itppears  black.  Scutellum  wholly  .^ell()\v,  densely  yellow  pilose.  Ab- 
domen with  abundant,  long,  reddish  yellow  j)ile ;  first  segment  black, 
.s('<;ond  segment  bioadly  siinin^  reddish  yellow,  in  the  middle  opaque 
black,  the  black  is  broad  in  front,  behind  it  ()c<;npies  less  than  a  fourth 
(>r  the  width  of  the  segment  ;  third  segment  of  the  same  reddisli-yellow 
color,  shining;  the  nie(liaM  broad  black  stripe,  continuous  with  the 
black  of  the  scond  so^nneut,  is  opaque  in  front,  shining  bchin<l  ;  fourth 
segment  similar  to  the  third,  but  the  bhick  wholly  sliining  ;  liyi)opygium 
shining  black.  Legs  black,  with  bhuik  pile  ;  tibue  yellowish  at  the 
biise.  Wings  nearly  hyaline  ;  stigmatic  spot  dark  blown  ;  a  broad,  dis- 
tinct, brownish  spot  in  the  middle  of  the  wing. 

One  specimen,  Como,  Wyoming,  altitude  7,000  feet. 

It  is  probable  that  :he  amount  of  yellow  on  the  abdomen  may  vary, 
e«i)eeially  on  the  third  aixl  fourth  segments 

Eristalis  occideiitalis.  ** 

Erixtalis  occideiitalis  VVillislnii,  Pidc.  Am.  Phil.  Soc    xx,  ;{22. 

Habitat. — Wa.shington  Territory!  « 

^  ,  2  .  Length,  10  to  V2"'"\  Allied  to  Baatardi  and  montanus.  Face 
clotlied  with  reddish-yellow  pile  and  jtollen,  not  at  all  concave  below 
the  antennal  process;  median  stripe  and  cheeks  bare,  shining  black. 
Aiitenme  black;  atista  red,  pubescent  near  the  base.  Eyes  pilose;  coa- 
tif-nous  for  a  short  distance  (  S  ).  Front  in  the  female  a  little  narrowed 
above  ;  thickly  yellowish  pollinose  aiul  with  abunilant  yellow  i)ile,  near 
the  vertex  black.  Thorax  oj)aque  black,  with  long  yellow  pile,  a[)par- 
eutly  more  abundant  in  the  male,  but  not  concealing  the  ground  color 
when  seen  froai  above;  in  the  female  on  the  front  part  in  the  middle 
with  two  narrow  grayish  stripes,  abbreviated  posteriorly.  Scutellum 
yellow,  with  more  abundant  yellow  pile.  Abdomen  black,  with  abun- 
dant, rather  long,  yellow  iiiie  ;  fust  segment  black;  second  broadly 
yellow  on  the  sides,  the  black  opiwjue  portion  broadly  along  the  front 
inaigin,  a  third  of  the  width  of  the  segment  behind  ;  third  segment  yel- 
low on  the  sides,  with  a  shining  inteirupted  transverse  fascia,  the  black 
elsewhere  opaque ;  fourth  segment  shining  black  with  a  small  opaque 
spot  in  front,  sometimes  reddish  on  the  sides  in  front;  second,  third, 
and  fourth  segments  with  a  narrow  yel'ow  hind  margin.  In  the  temale 
the  yi'Uow  is  apparently  less  extensive  ;  on  the  second  segment  forming 
large  triangular  spots;  on  the  third  nearly  or  quite  wantnig,  tin.'  shin- 
ing fascia  entire.  Legs  black ;  base  of  all  the  tibiaj  whitish-yellow,  the 
first  two  joints  of  the  middle  tarsi  yellowish.  Wings  hyaline ;  a  dis- 
tinct brownish  spot  at  the  middle. 

Six  specimens,  Washington  Territory. 

This  species  is  evidently  variable  in  the  abdominal  markings.  It 
irnist  be  allied  to  inlo.stts  from  Greenland,  though  certainly  different. 


168 


lUJLLKTIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


lit: 


Eristalis  Bastardi. 

ErMaliH- ItoHtariUi  Macqnart,  Dipt.  Exot.,  ii,  2,  3.'),  7;  pi.  ix,  fig.  1. 
EriHtaliH  armlmetalliciia  Macquart,  Dipt.  Exot.,  4o  snppl.,  140,  66. 
ErMalis  nehulosiis  Walker,  List,  etc.,  iii,  01(5. 

Habitat.— J^ew  Englaod,  Canada,  Labrador! 

S,9.  L"iiKth,  11  to  12""".  Eyes  i)ilo.se,  contiHUou.s  in  tbe  male.  Fac& 
and  front  concealed  beneath  reddish-yellow  pollen  and  yellow  pile,  the 
facial  strii)e  and  cheeks  shining  black.  Vertex  with  black  i)ile.  An- 
tennaB  black  ;  arista  shoitly  and  thinly  pilose.  Thorax  with  abundant 
bright  yellow  pile,  sparser  across  the  disk,  where  it  is  sometinjes  mixed 
with  black;  the  deep  o|)aque  black  ,<,'round  color  is  apparent  from  above 
in  large  part.  Scutellum  light  yellow,  with  pile  like  that  of  tiie  tho- 
racic dorsum.  Abdomen  :  first  segment  black  with  yellow  pile;  second 
segment  on  the  sides  with  a  rather  small  red  spot,  sonictiines  obscure 
and  not  quite  reaching  the  lateral  margin;  clothed  on  the  sides  with 
yellow  i)ile ;  the  black  wholly  oi)aque  with  thick  black  pile,  often  more 
or  less  intermixed  with  yellow.  Third  segment  usually  wholly  black, 
but  in  some  northern  specimens  broadly  red  on  the  sides,  ncross  the 
middle  with  a  shining  fascia,  in  front  and  behind  opaque,  but  not  readily 
perceived,  owing  tc  the  dense  black  i)ile,  which  is  not  infrequently  in- 
termixed more  or  less  with  yellow,  especially  on  the  sides;  remainder 
of  the  abdomen  wholly  bright  shining,  usually  clothed  with  longer  yel 
low  i)ile,  but  sometimes  the  vellow  is  mainly  confined  to  the  sides.  Lefjs 
black  with  black  pile;  basal  portion  of  all  the  tibiai  yellow.  Wiii^s 
hyaline  with  a  large  brown  spot  in  both  sexes,  sometimes  rather  faint. 
Numerous  specimens. 

A  common  species  in  the  New  England  States.  Osten  Sacken  gives 
the  synonymy  of  nebttJosus  from  an  examination  of  the  type.  The  type 
of  semimetalliciis  he  also  examined  and  believe<l  it  to  be  the  same; 
though  it  might  possibly  be  an  allied  species.  Macquart's  descrip- 
tion certainly  applies  closely  to  some  individuals,  and  it  seems  to  me 
that  It  is  unquestionably  a  Bastardi. 

Eristalis  flavipes. 

Eriatalie  flavipea  Walker,  List,  etc.,  iii,  C33. 

Eristalis  melanostomns  Loew,  Ceiitnr.,  vi,  69. 

Milesia  barda  Say,  J.  Acad.  Phil.,  vi,  1()3;  C'oinpl.  Wr.,  ii,  357  (female). 

Habitat. — Canada,  New  England,  Washington  Territory!,  Minne- 
sota (Loew). 

3,9.  Length.  13  to  17'"'".  Large,  shining,  robust,  black,  thickly 
l)ilose.  Face  and  cheeks  shining  black,  a  little  yellowish  dusted  near  the 
autennic,  on  the  sides  very  sparsely  whitish  pilose.  Eyes  broadly  coiiti}!- 
uous  in  the  male,  their  pile  chiefly  confined  to  a  dense  vertical  stripe. 
Frontal  triangle  yellow  poUiuose  and  with  abundant  yellow  pile;  in  the 
female  the  front  is  brop.l  above,  thickly  reddish-yellow  poUinose  and 
with  abundant  yellow  j-ile,  above  the  ba.se  of  the  antenna3  somewhat 
shining.    Antennas  brownish-black,  often  somewhat  reddish,  arista  thin 


SYNOPSIS  oi'  NORTH  a:\iekican  syrphid^. 


169 


ly  plumose  on  tlio  basal  portion.  Dorsum  of  «^liorax,  pleurae,  and  scutel- 
lum,  with  very  abundant  and  long  bright  yellow  pile,  less  abundant  on 
the  disk  of  the  dorsum,  where  the  deep  black  ground  color  is  apparent, 
and  the  i)ile  also  frequently  more  or  less  intermixed  with  black,  some- 
times broadly  and  conspicuously  black  (var.  melanostomus  Lw.).  Scutel- 
liun  wholly  light  yellow.  Abdomoii  deep  black,  everywhere  shining; 
on  each  side  of  the  middle  cf  the  se«ond  segment  frequently  the  ground 
color  is  deep  reddish  ;  i)ile  dense,  in  color  black  and  yellow  variable, 
usually  on  the  first  segment,  and  more  or  less  on  the  second,  longer 
yellow ;  sometimes  the  yellow,  with  a  reddish  cast,  covers  the  entire 
abdomen  except  the  tip,  the  fifth  segment  usually  yellow  pilose.  Legs 
deep  black,  with  black  pile;  knees  reddish,  anterior  tarsi  brown,  nnddle 
and  posterior  ])airs  consi>iciionsly  light  reddish-yellow,  except  their  ti|), 
hind  femora  somewhat  elongate,  hind  tibiae  bent.  Wings  hyaline,  veins 
luteous,  in  the  female  with  a  large  brown  spot. 

A  very  common  and  fine  species,  in  appearance  strikingly  resembling 
Malhta  posticafa.    Thirty  specimens. 


Eristalis  compactus.     (Plate  VII,  fig.  9.) 

EriataUa  compavtiin  Walker,  List,  etc.,  iii,  619. 
Eristalis  airicepn  Loew,  Centiir.,  vi,  04. 

i^rt6*7«^— Hudson  Bay  Territory  (Walk.),  White  Mountains,  Canada 
(Lw.),  Connecticut! 

^  ,  9  .  Length,  9  to  10™".  Black,  shining.  Face  on  the  sides  lightly 
covered  with  wl'.itish  jKdlen  and  thin  whitish  ])ile.  Front  in  female 
yellow  jdlose  below  ;  on  the  sides  lightly  poUinose  above,  clothed  with 
black  pile.  AnteniiiTi  red,  third  .joint  unusually  large;  arista  bare. 
Eyes  wholly  lightly  i)ilose.  Dorsum  of  thorax  shining,  with  reddish 
pile  on  the  sides,  more  obscure  in  the  middle.  Pleiine  mostly  black 
pilose;  scutellum  brownish  red  with  bhudv  pile,  along  the  border  the 
l)i]e  is  reddish.  Second  segment  of  the  abdomen  on  the  sides  witM  ihe 
usual  triangle  red,  or  brownish  red,  and,  extenduig  across  between,  a 
shining  fascia,  not  interrupted  in  the  middle,  the  black  elsewhere  deep 
opaque,  hind  border  yellow ;  third  segment  and  also  the  fourth,  except 
their  yellow  hind  border,  wholly  shining,  the  posterior  part  of  the  third 
segment,  however,  less  distinctly  so,  subopaque ;  liypopygium,  or  fifth 
segment,  wholly  shining.  Pile  on  the  sides  of  the  segments  reddish, 
along  the  lateral  margins  on  the  front  i)art  of  the  segments  whitish,  and 
at  the  tip  of  the  abdomen  intermixed  with  light-colored  pile,  on  the 
black  portions  short,  thick,  black.  Venter  black,  shining,  with  long, 
whitish  pile,  the  posterior  margins  of  the  segments  whitish.  Legs  red- 
dish, black  pilose,  hind  femora  not  thickened,  basal  i)art  of  femora  and 
last  three  joints  of  tarsi  black,  the  distal  end  of  anterior  and  i)Osterior 
.'.bia;  more  or  less  brownish,  the  tibiiu  at  the  base  yellow.  Wings  hyaline, 
veins  bhick;  the  anterior  \)\\vt  as  f.ir  as  the  cross-vein,  and  reaching  a 
little  into  tlu^  base  of  the  second  basal  cell,  brown. 


I 


170 


BULLETIN    31,    IJN1TP:D    STATES    NATIONAL   MUSEUM. 


n 


A  siujfle  specimen,  taken  Juno  15  in  Connecticut,  apfrees  quite  with 
Loew's  (le8crii)tion,  c.cept  that  the  feiuoia  are  ina  greater  degree  reddish. 
Ici  Walker's  specimen  that  he  described,  the  legs  were  wholly  ferrugin. 
ous,  except  the  tip  of  tarsi.  The  color  of  the  femora  is  evidently  variable, 
and  I  have  :io  doubt  that  the.  present  is,  as  Baron  Osteu  Sacken  .sug. 
pected,  Walker's  species.  The  species  will  be  easily  recognized  by  the 
blackish  marking  along  the  fore  border  of  the  wing. 

Erlstalis  transversus.     (Plate  VII,  lij;.  h. ) 

Krinfa1in  iraiiHvcrmiH  Wiodcnianii,  Anss.  Zw,  Iiih.,  ii,  18rt,  fil. 

Krislal'is  phUadelphivna  Macquart,  Dipt.  Exot.,  ii,  2,  JM,  (>;  \A.  viii,  fig.  4. 

EriKliil'iH  i>iiiniliiH  Mafi|nai't,  Uii)t.  Exot.,  ii,  2,  1)7,  43. 

Ju'inlalin  riilitiiiH  ,M;ic(]iiart,  Ili^it.  Nat.  Dipt.,  i,  307,  19. 

J'Jrixlalin  ioiHilii-1  liijiot,  Ann.  Sdc.  Eiit.  Franco,  1880,  'il7. 

Habitat. — Atlantic  States  I 

(?,5.  Length,  7  to  12""'".  Eyes  pilose  on  upper  half,  broadly  contig- 
\ious  in  the  male.  Frontal  triangle  black,  shining  in  the  middle,  polli- 
nose  on  the  sides,  the  ])ile  black ;  front  in  female  with  black  pile,  nar- 
rowed above,  on  the  lower  two-thirds  reddish  polliuose,  just  above  the 
base  of  the  anteunai  shining  black,  around  the  ocelli  also  somewhat 
pollinose,  below  the  ocelli  velvety  black,  extending  downwards  into 
three  points,  one  along  each  eye  and  one  in  the  middle.  Antennae 
TPddish  yellow,  the  first  two  joints  and  the  upper  part  of  the  third 
often  brownish  or  blackish ;  arista  reddish,  the  basal  portion  sparsely 
plumose.  Face  concealed  on  the  sides  beneath  dense  whitish  jiollen  and 
whitish  i)ile,  the  median  stripe  sind  cheeks  shining  black.  Dorsum  of 
thorax  opaque  black,  with  three  grayish  olivaceous  transverse  bauds, 
the  first  along  the  front  border,  the  second  just  before  the  suture,  the 
third  midway  between  this  and  the  scutellum ;  pile  not  at  all  abundant, 
lutescent,  on  the  pleurae  more  abundant,  yellow.  Scutellum  bright 
yellow,  ;^long  its  base  narrowly  black.  Abdomen  in  the  male  as  fol- 
lows :  first  segment  black ;  second  segment  with  large  lateral  triangles, 
and  narrow  posterior  border,  bright  yellow,  elsewhere  wholly  opaque 
black,  extending  narrowly  to  the  lateral  margins;  third  segment  with 
a  large  quadrilateral  spot  on  each  side  in  front,  and  posterior  border, 
yellow,  the  black  is  opaque,  except  a  narrow  shining  cross-band  that 
cuts  oft' a  small  opavjue  spot  in  front;  fourth  segment  with  a  small  yel- 
low spot  on  each  anterior  angle,  and  a  posterior  yellow  border,  broader 
than  on  the  i)receding,  remainder  of  the  segment  opaque  black  with  i,ii 
entire  shining  (iross-band  before  the  middle  of  the  segment;  hypopyg- 
ium  shining  black.  In  the  female  the  lateral  .spots  of  the  second  seg- 
ment are  smaller,  the  .secoiul,  third,  fourth,  and  fifth  segments  with  a 
narrow  yellow  hind  border  and  an  entire,  or  subinterrupted  shining 
cross-band  on  the  anterior  part  of  each  .segment;  on  the  third  and 
fourth  .segments  sometimes  with  a  small  yellow  spot  on  the  sides  in 
front.  Legs  variable ;  usually  black  with  the  tip  of  femora  and  base 
of  tibiJB  yellow ;  at  other  times  the  distal  half  of  all  the  femora  and  the 


SYNOPSIS    OF    NORTH    AMERICAN    SVRPHiniE. 


171 


base  of  hind  tihiii',  ft'iiiniii,  iiml  tlu-  Iiii;ji;«m'  itoitioii  (if  tin'  tarsi  yellow; 
more  rarely  tlic  Iroiit  mid  middle  k'jis  nniy  Ix-  aiiiiosr  w  liolly  yellow  ami 
the  blaek  coiiliiied  to  outer  ]>art  of  liiiid  femora,  tip  of  iiiiid  tibia*,  aiiil 
tip  of  all  the  tarsi.  Wiiijjfs  hyaline,  the  basal  portion  a  little  yellowish. 
I  have  examined  a  larjjfe  number  of  Kpeeimens  of  this  speeies  eolleeted 
mostly  in  New  England,  and  believe  the  synonyms  as  {^iven  to  be  correct. 
Small  si)ecimens  corresponding  to  puinihis  wvre  talcen  late  in  Dctober, 
and,  upon  *irst  si{?ht,  certainly  seemed  a  dilTerent  species,  but  a  further 
study  showed  the  impracticability  of  separatinj;  them  from  the  more 
typical  frnnNrersun.  Altojjether  I  have  examined  about  75  specimens, 
colk'cte<l  from  Canada  to  I'lorida. 

Eristalis  viuetorum.     (I'lato  VII,  ii^.  Ha.) 

Si/rphiin  riiiclorum  raltriciu.s,  Eut.  SJ.VHt.,  Suppl.,  iiC'2. 

r.riHlali»  rinetoriim  Fabritiii.s.  Sjst.  Anil.,  ^•i'>,  111;  Wiedetuann,  Au88.  Zw.  Ins., 

ii,  UYA,  If);   Macqnart  Dpt.  E.xot.,  ii,  '2,  41,  IG. 
EriHtalii  Infuwiatitu  Say,  J.  Acad.  Phil.,  vi,  Iti,") ;  Coiupl.  Wr.,  ii,  359. 
Erislalia  uvaruni  Walker,  List,  etc.,  iii,  G2'.i. 
Eristalis  <Aor«cictt«  Jaeunickc,  Neuo  Exot.  Dijtt.,  91. 

IlabUat. — Cuba,  Florida,  Georjfia,  Mexico!,  Indiana  (Say),  Pennsylva- 
nia (O.  S.),  Jjrazil  (Schiner). 

(?,$.  Length,  11  to  14""".  Anteniiie  reddish-j^ellow;  arista  bare.  Face 
reddish-yellow;  on  the  sides  with  whitish  pollen  and  l)ile;  the  median 
stripe  and  cheeks  shining,  nnn-e  or  less  brownish.  Frontal  tr'-vngle,  like 
the  face,  clothed  wholly  with  white  pile;  fnuit  in  female  narrow  above, 
more  yellowish  than  the  face,  in  the  middle  with  a  brownish  stripe; 
above  with  blackish  pile  near  the  ocelli,  below  yellowish-white.  Dorsum 
of  thorax  opaque  black,  with  three  distinct  grayish-olivaceous  fascite, 
the  tirst  on  the  front  border,  the  second  just  before  the  suture,  and  the 
third,  the  broadest,  just  in  front  of  the  scutellum,  the  intervals  between 
tbem  crescentric;  pile  short,  yellowish;  jdeune  grayish  ixdlinose,  Scu- 
tellum reddish-yellow,  lighter  along  its  border.  Abdomen  in  the  male 
as  follows :  first  segnient  black,  on  the  sides  reddish-yellow ;  second  seg- 
ment with  large  lateral  spots,  not  reaching  the  hind  border,  the  ojiaque 
black  very  narrow  between  the  tips  of  the  side  spots,  broader  in  front, 
and  reaching  across  the  segment  in  front  of  thcnarrow  yellow  hind  bor- 
der; third  segment  with  a  large  spot  in  front  on  the  sides,  usually  more 
reddish,  and  a  narrow  yellowish  hind  border ;  a(;ross  the  middh^  a  shining 
entire  baixl,  leaving  an  opaque  black  sj)ot  in  front  and  a  similar  colored 
fascia  behind;  fourth  segment  with  a  shining  cross-band  in  front, opaque 
behind,  posterior  bordermore  broadly  yellow;  hyi)Oj>ygium  shiningblack. 
In  the  female  the  yellow  spots  on  the  third  segment  are  usually  smaller 
or  wanting.  Pile  on  the  opaque  ])ortions  black,  elsewhere  yellowish.  In 
some  specimens  the  abdomen  is  ferruginous  on  the  sliining  j)arts,  and  the 
opaque  jmrtions  of  a  deeper  color.  Legs:  anterior  and  middle  pairs  yel- 
lovnsh  or  reddish,  the  base  of  femora  and  tip  of  tibite  brownish,  hind  fem- 
ora considerably  <lilated,  usiuiUy  broa<lly  blackish,  sometimes  deep  red, 


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172  lU.'LLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 

distill  IiJilf  of  liiiid  tibia)  blackish.    Wings  liyalinc,  basal  portion  a  little 
.v«jlIo\visli. 
Ten  spocinn'iis,  Florida  (Professor  Riley),  Georgia,  Cuba. 

Brlstalis  albiceps. 

Krhtalin  ulbwepa  Matriuart,  Dipt.  Exot.,  ii,  2,  T)*!,  41 ;  OHtcii  Sackoii,  Cut.  Dipt,, 

i:tl,  iiotea-Jl. 
KrixlaUH  seniculua  Lcihw,  Ceiitiir.,  vi,  G\i. 

Ilabiint. — ('arolina  (Macq.),  Cuba  (Loew),  Florida,  San  Doniingol 

$  .  Length, 8  to  9""".  lJlaek,oi)a(|ue.  Kves  jnlose, contiguous  in  iiiiile. 
Face  concealed  beneath  white  i)ollen  and  thick  pure  white  pile,  iiioic 
abundant  and  cons]>i(;uous  on  the  frontal  triangle.  Facial  stripe  ;iiii| 
che<'ks  shining  black.  Antenna- obscurely  reddish  or  ferruginous;  iuista 
bare.  Dorsum  of  thorax  clothed  with  yeliowishwhir*'  pile  in  front,  inter 
mixed  with  blackish  behi.nd  ;  in  front  (»f  the  suture  with  a  conspiciiouv 
grayish  pollinose  i'ascia,and  on  each  side  with  an  oblique  spot  reacliiiij; 
from  the  root  of  the  wing  backward  towai'd  the  scutellnm.  Scuiteliiiiii 
yellow, base  nairowly  black,  jtile  black.  First  segment  of  abdomen  l)l;i(k, 
outer  angles  yellow;  sec(»nd  segment  light  yellow,  with  a  narrow  mcdiiin 
opaque  black  stripe  not  (piite  reaching  the  hind  margin,  a  little  broadci 
in  front,  where  it  connects  with  the  semicircular  black  below  the  sen 
telluin  ;  third  segment  with  an  ()val  reddish  yellow  sjiot  on  each  side, 
contluent  with  the  yellow  of  the  i)r('cediiig  segnu'nt,  the  hind  bordei 
yellow,  the  black  deep  opacpu'  without  any  shining  spot  or  fascia;  ftuuili 
segment  with  a  yellow  hind  border,  and  a  narrow  inteirui»ted  sliiiiinii 
lascia  dilated  on  the  sides;  hypopygium  shining  black  wilii  light  pile; 
])ile  on  the  opaque  i)ortions  black,  on  the  yellow  sjjots  yellow.  ]a'\:> 
black;  hind  femora  dilated;  knees,  basjil  third  of  front  and  hind  tiliiii. 
basal  half  of  I  he  intermediate  tibiie,  and  the  middle  metatarsi,  light  yellow. 
the  extreme  base  of  the  anterior  metatarsi  luteous.  Wings  hyaline,  soiiit- 
times  faintly  clouded  in  the  middle  and  outer  ])arts;  near  the  end  of  tlit- 
marginal  cell  there  is  a  distinct  curvature  of  the  second  vein  into  the 
submargiual  cell. 

9  .  Differs  in  the  jiresence  of  a  complete  grayish  band  on  the  dorsum 
of  the  thorax  in  front  of  the  scutellum,  in  the  second  segment  of  the  ab 
domen  being  broadly  oj)aque  black  in  the  middle,  narrower  in  front  and 
extending  as  a  fascia  to  the  lateral  margiu  of  the  abdomen  behind;  the 
third  and  fourth  segments  have  each,  also,  a  narrow,  interrupted  shiniii? 
fascia,  and  the  lower  part  of  the  front  is  not  wholly  white  pilose. 

Baron  Osten  Sacken,  after  an  examination  of  the  ty])e  of  albiceps^  states 
that  it  looked  like  soncidxs  of  Loew.  Macquart's  description  applies  sut- 
ficiently  closely, except  the  '-yeux  nus,"  which  is  ])robably  an  error,  such 
as  he  has  also  made  in  regard  to  other  North  American  sjtecies  of  this 
genus.  The  <lesciiption  of  scniciilm  api)lies  fully  to  the  specimens  which 
I  have  from  Florida  (two,  Dr.  Whittield),  Georgia  (two.  Professor  Riley). 
and  San  Domingo  (three,  Mr,  G.  F.  Frazar). 


SYNOPSIS    OF   NORTH    AMERICAN    SYRPHID/E. 


173 


BriBtalls  hortonim.    (Platr  Vll,  fl.t.  10.) 

MiiHcii  HiiriiiaiiiciiHi/i  Dearer,  vi,  l-ir>;  lal>.  xxix,  fij^.  1. 
SjirjihuH  horloniiii  l''!iliii"iiis,  8yst.  Kiit.,  Ttil,  U  ;  Eiif.  Syst..  iv,  '^3(5,  '2'J. 
EriatoliD  hortonim  riiluiciuH,  Syst.  Antl.,  "j:}*!,  l(i ;  Wiedemann,  Ansa.  Z»v.  Ins., 
ii,  1(111. 

JIahi (((t.  -Wvst  l\nl\vs\ 

i.  Iit'ii;;lli,  IL'""".  Aiit«-iina!  oriUi<i(;-yt'lIo\v,  iiii.stii  ban*.  Face  and 
trout  oraii^jc  yellow,  tlii<;kl.v  covered  with  yellow  polleti  and  pile;  face 
with  a  sliiiiiii;;'  yellowish  red  stripe,  not  very  broad;  clieeks  with  a 
sbiuing  black  .strij)e.  ICyes  pilose, coiiti,yiiou.s.  Thoracic  dorsum  black, 
sliininj;' behind;  front  inarj;in grayish pollii:o.se,separated by ablack band 
tVoiii  the  rather  slender  yellowish  {grayish  band  on  the  suture;  in  front 
of  the  scntelluin  rather  broadly  yellowishj>rayish  pollino.se,  .separated, 
or  ni'arly  so,  troni  a  similarly  colored  spot  ahnij;'  the  post  alar  callus. 
Pleiiiii'  tiiickl  white  pollinose  below,  above  with  j^olden  yellow  pile. 
Sciitelhini  wholly  yellowish-red.  Second  sejiuient  of  abdomen  on  each 
side  with  a  larye  yellowi.sh-red  trian^jle,  broadly  separated  by  opaque 
liliHik,  which  extends  out  narrowly  nearly  to  tiie  lateral  margin  behind; 
]»(»s\tiior  maryin  yellow;  i)ile  behind  black,  elsewhere  yellow.  Third 
8t';;inent  wholly  shiiunj;,  with  black  pile,  excejjt  on  the  lateral  margins; 
tilth  .segment  shining  metallic,  with  goldei;  yellow  pile,  posterior  margin 
yellow,  and  Just  before  it  a  narrow  tiansveise  opaque  black  fascia. 
IIyi»o|)yginm  wholly  shining  black,  with  golden-yellow  j»ile.  Legs  yel- 
lowishrcd,  base  of  four  front  til»ia;  light  yellow;  hind  femora  consid- 
ciiiltly  thickened,  hind  tibia;  compressed,  in  front  an<l  behind  with  a 
liiiigc  of  black  pile.  Wings  on  the  jiosterior  portion  hyaline,  in  front  ou 
riic  basal  portion  yellow,  from  before  the  cross-veins  to  near  the  tip  and 
beyond  the  middle  dark  brown. 

Four  specimens,  San  Domingo  (G.  F.  Frazar). 

Eiistalis  atrimcinus, 

Kristarm  atrUnanun  Loow,  Ct'iitur.,  vi,  02. 

Eobitat — Cuba  (Lw.),  San  Domingo! 

^.  Length,  12""'".  Black,  opaque.  Eyes  pilose,  broadly  contiguous. 
Face  thickly  clothed  with  yellowish-white  pollen  and  pile,  median  8tripe 
aiid  the  cheeks  bare,  black  and  shining.  Antennas  blackish,  arista 
bare.  Frontal  triangle  black,  shining  in  the  middle  and  clothed  with 
black  pile,  along  the  edge  imrrowly  white  pollinose.  Dorsum  of  thorax 
on  the  anterior  margin  cinerescent,  across  the  suture  .vitU  a  trans- 
verse, yellowish- white  pollinose  band;  anterior  part  of  the  dorsum  with 
yellow  pile,  posterior  part  with  black  i)ile.  Scutellum  ochraceous  yellow ; 
pile  chiefly  yellow,  the  remainder  black.  F'irst  abdominal  segment  black, 
tbe  lateral  angles  yellow  ;  second,  with  two  large  yellow  spots  touching 
the  front  margin  in  their  whole  length,  rather  narrowly  separated  in  the 
middle  and  extending  on  the  sides  nearly  to  the  hind  margin,  their 
inner  ends  convex  from  the  front  border  of  the  segment ;  the  black  is 


i  I 


rr 


f   Ii 


174 


BULLETIN    :;i,    INITKI)    STATKH    NATIONAL    Mrsr.l'M. 


!  t'l 


,'|l 


r  i 


.(It 


wholly  oi)aqti<',  I'xtt'irliii};  iiiinowl.v  to  tin*  latrrul  marfjins;  tlilril  sojj 
went  with  two  lai';-*'  yt'llo  v  spots,  l(';iviii;f  the  hhu'k  siinihir  to  thatnf 
the  itrecedin;;:  S4'i;in(  lit,  but  cxtciKliii;;  ulittlr  more  broadly  to  the  lateral 
innrgiiiM,  and  more  loMiide'.l  in  front ;  i'oiirth  si';;iiH>iit  opaque  black,  witli 
a  slender,  narrowly  interrupted,  inetalMir  cross-band;  hind  mar^'ins  of 
the  se<!oiid,  third,  and  fourth  sefiiiU'iitH  yellow;  hypopyjjium  shiniiijj 
bhurk,  with  yellow  pile;  <'lse\vliere  IhepiU'on  the  black  jiortion.s  is  black, 
on  the  yellow  parts  yellow.  Lej^s  black  ;  tip  of  four  front  femora,  basnl 
third  of  four  front  tibia*,  and  narrow  base  of  hind  tibiic,  yellow;  hiiid 
femora  but  sliyhtly  thickened.     Wind's  hyaline. 

9.  Fi'.tntwith  abroad  median  black  stripe, entire, black  pilose, on  tin 
sides  coiiceahMl  iM-neath  y«'IIowish  ])ollen  and  whitish  jule.  Secoiui 
sejjment  of  the  abdomen  with  the  yellow  not  extendin{<  so  far  backwiinl 
and  more  narrowly  separated  ;  third  se<;ment  wholly  without  yellow, 
on  each  sidt^  with  a  shininp'  spot. 

Three  males  and  oiu'  i'emale,  San  Doininjio  (G.  K.  Frazar).  1  lu'lieve 
my  identification  of  this  species  is  correct,  but  I  do  not  observe  any 
poUinose  spot  near  the  postalar  callus  as  Loew  describes. 

EristallB  pilosus. 

J'Jriatalia 2>ilo8iin  Loinv,  Ci'Utiir.,  vi,  70. 

Habitat. — Urceiiland  ( Lw.) ! 

^  ,  9  .  LengtJi,  11  to  l.'i""".  Black,  thickly  <^lothed  with  long  yellow 
pile;  eyes  black  i)ilose;  anteiin{e  Itlack,  arista  ban*;  face  black;  thorax 
unicolorous,opa<iue;  scutellum  luteous;  liist  two  abdominal  sejjnieiits 
opaque;  the  second  on  eacli  side  with  a  dilutely  lutescent  spot;  third 
black,  with  two  opaque  spots,  conllneiit  in  an  abbn^viated  fascia;  two 
ultimate  sejjments  bronze-black,  sliinin.y,  witii  a  minute  triangular  sjjot 
opaque;  pile  of  the  dorsum  reddish,  on  the  sides  of  the  mid<lle  black, 
remainder  yellow ;  wiiiffs  pure  hyaline,  veins  fuscous  black,  in  the  fe- 
male with  a  blackish  si)ot. 

IJlack,  c]((thed  with  lonj;  yellow  i>ile,  sometimes  li{,diter.  Heiul 
black,  yellow  jiilose  ;  fac"  of  the  same  color,  and,  excei)t  the  very  broad 
median  stripe,  is  thinly  covered  with  y«>llowish  pollen ;  eyes  in  both 
sexes  black  jiilose,  in  the  male  contimu)us,  in  the  female  broadly  sepa- 
rated. Antennae  black,  arista  bare.  Thorax  unicolorous, opaque;  pile 
wholly  yellow.  Scutellum  dilutely  lutescent,  very  thickly  yellow  pilose. 
First  two  segments  t  '  the  abdomen  opaque ;  second  on  each  side  with 
a  snbrotund  spot,  very  dilutely  lutescent,  on  the  posterior  margin 
smooth.  Third  segment  shining,  with  two  opaque  spots,  forming  an 
abbreviated  fascia.  The  remaining  seu'ments  are  bronze-black,  shining, 
except  a  minute  triangular  spot,  situated  near  the  margin  of  the  fourth 
segment.  Pile  of  the  abdomen  yellow,  in  the  middle  of  the  abdomen 
reddish,  near  the  tip  sometimes  i)allid,  on  the  posterior  angles  of  the  sec- 
ond segment,  and  the  lateral  margins  of  the  third  segment,  except  the 
angles,  black.    Legs  black,  black  pilose :  hind  femora  slender,  narrow 


.SYNOPSIS    OF    NORTH    AMERICAN    HYRPIIIDJE. 


175 


hiisc  of  tlie  tibiii'  fiiscrous.     Wiiifj.s  pun'  liyulinc,  voiiis  fiiHcouH-blaoky 
vriiis  of  flic  disk  in  tliii  fotniilc  uloiidtMl  with  blackish. 
TninHhition  from  original,  conipanMl  with  the  types. 

BrlstaliB  obsourus. 

F.rMaliH  ob'CiiriDi  I.oow,  (^-iitiir.,  vi,  (57. 
llt,hifat.—Mo(\  Hivor  of  the  North  (Loow)! 

S  .  LcnjAth  10  to  11""".  IJron/.t'-black,  sliininH:,clotlMMl  with  rather  long, 
(lijiitcly  Intesci'ni-ciiu'reons  idle;  front  broad,  above  black  pilose  ;  eyes 
pilose.  A'.iU;:wa;  re«ldisliterni;riiioiis,  first  two  joints  blaek ;  aristn 
pilose;  rare,  except  the  usual  stripes,  yellowish  red,  white  pollinoso  and 
white  pilose.  Scutcliuni  brown,  black  near  the  base.  Each  abuoniinal 
sofiiiu'iit,  except  the  first,  with  a  post«*rior  black  fascia,  not  einar;;inate, 
and  with  a  very  slender  posterior  yellow  margin.  Iie;;s  hV.icAi ;  tip  of  all, 
anil  base  of  liiiid,  femora,  t'le  basal  third  of  front  and  hind  tiln'a;,  ndddio 
tibiie,  except  the  tip,  and  the  lirst  twojoints  of  all  the  tarsi,  li;;ht  yel- 
lowish.    Wings  puic  hyaline,  veins  of  the  disk  clouded  with  fuscous. 

Similar  to  A\  dimidiatuH.  IJronze-black,  shininf;,  (dothed  with  rather 
(liliiti'ly  Intescent-cinereous  pile.  Front  broad,  concolorous,  above  black 
jjiiose,  a  median  spot  on  the  front  mar^iin  n'ddish,  the  lateru!  iiiar};in.<) 
ill  front  white  pollinose.  Face  yellowish-red  or  red,  white  ])olliiio.se 
and  white  pilose,  median  stripe  black,  rarely  pitchy,  oral  margin  and 
the  cheeks  always  black.  First  twojoints  of  the  antenuio  black,  third 
red  or  ferruginous- red,  rarely  obscurely  fuscous ;  arista  pilose.  Thoracic 
(lorsnm  neither  striped  nor  fascinte.  S(tutelluin  pitchy  or  brown,  near 
tiic  base  always  metallic  bhuik.  First  segment  of  the  alxlomen  glaucous, 
wliiti'  pilose;  second  segment  with  two  velvety  fasi-ia-,  separated  by  i\ 
shilling  fas(!ia  whic/li  is  mu(;h  dilated  on  the  sides  ;  the  jiostciior  margin 
yellow.  In  the  following  segments,  besides  the  very  slender  yellow  hind 
iiiiirgiii,  with  a  posterior  opaque  blairk  fascia,  that  on  the  third  seg?nent 
velvety,  on  the  remaining  segments  moderately  shining.  Pile  on  che 
jjosterior  part  of  each  segment  Idack,  on  the  front  portions  in  great  part 
ciiierescent.  Legs  black,  i)allidly  i)ilose  ;  hind  femora  slender,  near  tho 
b;ise  yellow;  tip  of  all  the  femora,  basal  thiid  of  front  and  hind,  and 
the  middle  tibiiiB  except  the  tip,  and  the  first  two  joints  of  all  the  tarsi, 
lijiflit  yellow,  tho  vsecond  joint  near  its  tip  blackish.  Wings  pure  hyaline, 
the  disk  clouded  with  fuscous,  stigma  and  immediate  base  fuscous. 

Translation  from  the  original,  compared  with  the  type  at  Cambridge. 

Eristalis  inornatus. 

ErixtaVis  inornatus  Loew,  Centur.,  vi,  68. 

Eahitot—UeA  River  of  the  North  (Lw.)! 

9 .  Length  13" "".  Submetallic  black,  shining,  clothed  with  rather 
long  lutescent  pile;  front  broad,  near  the  ocelli  black  pilose,  but  the 
vortex  itself  with  luteous  pile.  Eyes  ])ilose.  Antennre  reddish-ferru- 
ginous, the  first  two  joints  black;  arista  pilose.     Face,  except  the  usual 


17G 


niTLT.KTIN    31,    ITNITF.D   STATKfl    NATIONAL    MUSKUM. 


I     ' 


Rtripc,  yellow,  with  (lilut»'I>  Iut«'.s(M'iit  pile  ami  polh'ii.  Scuttlliiin 
wliollv  reddish.  lOiich  .s»';,'iin'iit  of  th«'  iih(h»iiicii,  ext-i'pt  the  ilrsf,  witli 
n  l>l<icl;  postei'ior  riiscia,  oil  tlu*  sccoiid' and  third  i>inar;{iiuite  and  vti 
v«'ty  opai|n''.  on  the  f'ulh)wini!:  siil*  .slijiiiii;^;  postt'iior  niar;,'in.s  of  tiic 
8<'^'m«  nts  V4'r.v  nai  rowlv  .vcihiw,  Ii«';;.s  hji'ck;  «'xtit'in('  tip  of  the  Itui 
ora,  tli)>  Uasal  half  of  front  and  hind  tlhia-,  the  iniddh*  tihia*  I'M-cpt  tlic 
distal  tliii'd  and  tlio  lirst  joint  of  tli*>  niiddlc  rar.si,  li<;|it  .V('llowi.sli. 
Wiiij;s  hyaline,  tiie  veins  of  the  di.sU  hiicidly  snhl'ilseoiis  eloiided. 

Somewhat  liron/e-lilaeU,  shinin;;,  <'lotiied  with  nUlu'r  lon^  liitesii  iit 
pile.  Front  broad,  (•oneoloroiis,  with  thiik  liiteou.s  pile,  near  the  ocelli 
black  iiilose,  on  the  sides  anteriorly  Inteons  pollinose,  the  anterior  mar 
^iii  above  the  anteiiniu  reddish.  Vm-.v  longer  than  in  A'. o/MCHrMwaiid  tlie 
tubercle  smaller,  eoneealed  beneath  diliitely  liitescent  pollen,  ;m\ 
clothed  with  tlut  same  colored  pile,  a  rather  siemler  median  stripe  ;nu\ 
till)  cheeks  black.  First  tw(t  Joints  of  antenmt!  black,  tliinl  reddish 
ferru;.''iiioiis ;  arista  pilose.  Thorax  niiicolorous,  moderately  shining, 
wholly  liiteoiis  pilos*',  the  pile  of  the  pleiinu,  however,  li;;hter  eoloicd. 
Scntellum  reddish,  luteons  jiilose.  First  abdominal  sej^meiit  {jiancoiis, 
remaining  sef^ments  shininy,  posterior  mar;; ins  of  the  si'cond,  third,  aiul 
fourth  segments  narrowly  yellow.  On  the  second  segment  there  are 
two  velvety-black  fascijc,  onooii  the  anterior  niar^^iii  and  attenuated  on 
the  sides,  the  other  touchin;;'  the  |>osterior  iiiar;;in  and  emar;;inate;  tliinl 
se;;inent  with  similar  faseiic,  but  the  anterior  one  is  more  slender.  Last 
two  se;ji-meiits  wholly  sllillin^^  near  their  posterior  iiiar;;ins  a  deepiT 
Mack.  Pile  of  the  abdomen  cliietly  black,  on  the  (irst  se;;mont  white, 
oil  the  front  half  of  the  second  se;;iiieiit  and  near  the  anterior  aii;:ks 
of  the  intermediate  sey:ments  pallid  luteseeiit,  on  the  ultimate  se;;iiKiits 
pallid,  intermixed  with  black.  Legs  black,  light  yell<»w  pilose,  hind 
femora  slender ;  tip  of  the  femora,  front  and  hind  tibite  at  their  base, 
middle  tibia3,excei)t  the  tip,  and  the  tirst  joint  of  the  middle  tarsi  with 
the  base  of  the  second  joint,  light  yellowish.  Wings  hyaline,  veius 
black  fuscous,  near  the  base  of  the  wings  reddish,  ii  large,  dilutely  sub- 
fuscous  spot  ou  the  disk,  stigma  minutely  black -fuscous. 

"The  type  specimen  has  the  abdomen  somewhat  rubbed,  so  that  iti8 
difficult  to  judge  correctly  of  the  pile." — Loew. 

Translation  from  the  original.    The  single  type  specimen  nt  Cam- 
bridge is  in  poor  preservation.   The  species  is  allied  to  dinv^iatiis. 


Erlstalis  oestriformis. 

SurphiiB  oestrifonniH  Walker,  List,  etc.,  iii,  573. 

Eristatis  oeHtriformia  Ostcn  Sacltoii,  Cat.  Dipt.,  131,  note  '227,  p.  249. 

Habitat.— Umlmii's  Bay  Territory  (W.ilk.). 

"  Mas.  Niger,  thoracis  pilis  anticis  nigris  posticis  fulvis,  scutello  fulvo, 
abdomine  pilis  albis  nigris  fulvisque  fasciato,  antennis  piceis,  pedibus 
nigris,  alls  limpidis  fusco  uniinaculatis. 

"  Body  black :  head  clothed  with  dull  tawny  hairs,  shining  and  proiui- 


SYNOPHIS    OF    NOUTIl    A.MKKKAN    SYKYIIID.I':. 


177 


netit  ill  front:  mouth  pitcliy  :  Icclrrs  pitchy:  liristh*  rcrni^iiMiiiH,  downy: 
eyeM  pitch}',  tMich  with  »  ))i'oa4l  Htripcot' shoi-t  hliicic  liuirH:  all  th(^  facets 
very  Hinall :  cheHl  clothed  with  Hhort  black  hairs,  and  on  the  hinder  part 
with  pale  tawny  hairH;  Hcutchcon  tawny,  very  thickly  clothed  with  pale 
tiiwny  hairs:  abdomen  nearly  oval,  broader  and  a  little  loiif^er  than  the 
t'ltc8t,  clothed  with  white  hairH  at  the  liase,  with  black  hairs  in  the  mid' 
(lie,  and  with  bright  tawny  hairs  towards  the  tip:  legs  black,  clothed 
wirli  short  bla(;k  hair :  knees  pitchy  :  shanks  and  feet  clothed  beneath 
with  tawny  down:  hiiul  feet  tawny:  claws  and  toot  cushions  tawny : 
tips  of  claws  black:  wings  colorless:  large  dark  brown  spot  in  the  disk: 
wing  ribs  pitchy  :  veins  black,  ferruginous  towards  the  bnse  and  along 
tiic  tree  borders  :  poisers  ferruginous.  Length  of  the  body  7  lines  ;  of 
the  wings  [s]>readj  14  lines." — Walker. 

"SyrphuM  ocHtriformiH  W^ilker  is  a  rather  peculiar  Kristalis,  repre- 
soiited  by  a  single  spfccinien  in  the  British  Museum." — Osten  ^acken. 

Eristalis  parous. 

Knulnlin  /xircnM,  lii^iit.  Ann.  Sou.  Ent.  Fr.,  188U,  21(). 

Habitat. — North  America  (Bigot). 

^.  Long.  KV""'.  Oculis  hirtis,  cbeto  basi  breviter  villoso  {E.  arbus- 
torum  simillimo).  Antennis  castaneis;  facie  nigra,  utrinque  cinereo 
ohscuro  villosa;  thorace  nigro,  dense  fulvo  velutino;  scutello  fulvo} 
ciilyptris  testaceis;  abdomine,  segmento  secundo,  utrinque,  macula 
lata,  trigona,  fulva,  tertio  muculis  siniilliinis,  sed  angustioribus,  cunctis 
anguste  fulvo  margiuatis;  femoribus  obscure  castaneis,  geniculis  et 
ribiis  ])allide  testaceis,  apice  late  castaneis,  tarsis  obscure  rufls,  apice 
imniin  iufuscatis ;  alis  fere  hyaliuis,  basi,  et,  extrinsecus,  dilute  et 
])allidissiine  infuscatis. 

Resemble  ii  I'arbustorum.  Yeux  veins,  chete  brievement  velu  d,  sa 
I)a8e.  Anteunes  brunatres ;  face  noire,  ijouverte,  de  chaque  cdt6,  par 
lui  duvet  grisatre ;  thorax  uoiratre,  couvert  d'un  duvet  roussatre  assez 
dense,  flancs  ^  poils  rouss&tres ;  ^cusson  d'un  testacd  fonc6 ;  cuillerons 
testac^s ;  abdomen  d'un  uoir  luisant,  presque  uu,  tons  les  segments 
tiuement  bord^s  de  fauve,  base  du  1*'  d,  poils  grisatres,  2«  et  3«,  de 
cLa(|ue  cdt^,  avec  une  macule  fauve,  triangulaire,  beaucoup  ]dus  ^troite 
sin-  le  3",  ventre  d'un  grisjaunatre;  pieds  d'un  brun  rouge^tre  avec  uu 
till  duvet  gris,  genoux  et  tibias,  h  la  base,  d'un  testae^  blanc&fttre 
(k'venant  plus  fouc6  vers  leurs  extr<5mit6s;  ailes  presque  hyalines, 
neivures,  base,  bord  externe,  d'un  roussatre  tr^s-clair. — Bigot. 


ADDITIONAL  NORTH  AMERICAN  SPECIES. 

Eristalis  agronim  Fabricius,  Ent.  Syst.,  iv,  2Hi),  M7   {Siirphua);  Syst.  antl.,  235,  18; 

Wicdciuaun,  Auss.  Zw.  Iiis.,ii,  17'2,  "JH.— Guiuloloupt'. 
Eristalis  albifrons  Wiedemann,  Anss.  Zw.  Ins.,  ii,  1^;  £oder,  Stett.  Ent.  Zeit., 

ia-f5,  340.— Porto  Rico. 
Eristalis  Bellardli,  Jiennicke,  Neue  Exot.  Dipt.,  92. — Mexico. 
Eristalis  oubensia  Macquiirt.,  Dipt.  Exot.,  ii,  2,  42,  19.— Cuba. 


i  In 


178    BULLETIN  ru,  UNITED  STATES  NATIONAL  MUSEUM. 


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Srlstalis  diminutus  Wnlker,  List,  etc.,  iii,  622.— Mexico. 
Bxlstalla  ezpictus  Walker,  TrnnH.  Eiit.  Soc.  N.  Ser.,  v,  291.— Mexico. 
Bristalia  familiaris  Walker,  Trans.  Eut.  Soc.  N.  Ser.,  v,  200.— Mexico. 
Eristalls  fulvipes  Bigot,  Ami.  Soc.  Eut,  do  Fr.,  l8.-<0,  225.— Mexico. 
ErlstaliafurcatuB  Wiedemann,  Auss.  Zw.  Ins.,  ii,  176,34. — Brazil,  Columbia,  Yucatan, 

A',  frmoratus  Macfjuart,  Dipt.  Exot.,  ii,  2,  40,  l.'j ;  tab.,  ix,  fig.  6. 
Bristalis  guadalupenais  Macquart,  Dipt.  Exot.,  ii,  2. — Guadeloupe. 
Eriatalis  Gundlachi  Loew,  Centur.,  vi,  61.— Cuba 
Bfiatalis  impoaitua  Walker,  Trantt.  Ent.  Soc.  N.  Ser.,  v,  28t>,— Hayti. 
Eriatalis  lateralia  Walker,  Linn.  Trims.,  xvii,  .'147,  42;   List,  etc.,  iii,  622. — Brazil, 

Cliili,  Oniiina,  ^lOxi(■o,  Jamaica. 
Eriatalis  mexicanua  Mac<|uart,  Di))t.  Exot.,  2^'  Suppl.,  .'>*.),  54.— Mexico. 
Eriatalia  pachypoda  Bigot,  Ann.  Soc.  Ent.  de  Fr.,  IHrtO,  224. — Mexico. 
Eriatalis  puaio  Wiedoniann,  Auss.  Zw.  Ins.,  ii,  192;  Riidcr,  Stett.  Pint.  Zeit.,  1885. 

:M1.— I'ortoRico. 
Eristalia  Sackenia  liigot,  Ann.  8()c.  Kiit .  do  I'r.,  18W0,  224. — Mexico. 
Eriatalis  semicirculua  Walker,  Dipt,  t^aund.,  249. — Honduras. 
Eristalia  Soul :.uquenaia  Bigot,  Ann.  Soc.  Ent.  de  Fr.,  1880,  228,— Hayti. 
Eriatalis  teataceicoruia  Macciuurt,  Dipt.  Exot.,  4"  Suppl.,  i:$8,  62. — Mexico. 
Eriatalis  tricolor  .I.eniiicke,  Nene  Exot.  Dipt.,  92. — M«<xico. 
Eristalis  unicolor  v.  d.  Wnlp,  Tijdschr.  v.  Entom.,  xxv,  i:U.— Guadeloupe. 
EristaUx  IxiMhiria  Maccjuurt,  Hist,  Nat.  Dipt.,  i,  502,  4. — North  America. 
Eriatalis  injiatm  Maecjuart,  I.e.,  i")07,  18. — North  America. 

"  I  did  'lot  tiud  the  types  of  these  species  either  in  Lille  or  in  Paris,  and  the  descrip- 
tions do  not  apply  to  any  of  the  known  species.''     (O.  Sacken,  Cat.  Dipt,,  133,) 
Eristalis  everts  Walker,  Dipt.,  Saunders.,  246. — North  America. 

Osten  Sacken  could  not  tind  the  type  of  this  species  in  the  British  Museum;  the 
description  will  not  permit  identitication. 


DOLIOSYRPHUS.* 

Doliosyrphna  Bigot,  Bullet.  Soc.  Ent.  de  France,  No.  13,  1882. 
t Priomerus  Macquart,  Hist.  Nat.  Dipt.,  i,  511,  1834. 

Allied  to  Kristalia,  but  differs  chiefly  iu  tlie  striicture  of  the  head  and 
iibdoiiien.  Large,  black  and  yellow,  thinly  pilose  species.  Head  large, 
globose.  Eyes  pilose.  Frontal  triangle  of  the  male  large,  projecting, 
in  profile  forming  an  obtuse  angle  near  the  middle.  Antennje  small, 
arista  bare.  Abdomen  broadest  at  base  of  second  segment;  narrowed 
to  the  tip  of  the  i'ourth  segment,  concave  on  the  sides,  the  tip  of  fourth 
segment  less  tlian  a  half  of  the  width  of  the  second  segment.  Hind  fem- 
ora much  swollen  and  elongate,  hind  tibia;  comi)ressed  and  arcuate. 
Otherwise  as  in  Erhtalis.  '  l\vpe  of  genus  D.  scutellntus  Bigot. 

This  description  isdi'awn  lioin  males  of  />.  liileyi.  1  have  seen  three 
other  species  from  Mexico,  all  agreeing  essentially  in  these  eharacter.s, 
and  I  believe  the  genus  is  a  well-founded  one. 

DolioayrphuB  Rileyi,  n.  sp.     (Plate  VIII,  fig.  8.) 

Habitat. — New  Mexico! 

(?.  Length,  14  to  lo""".  Eyes  pilose.  Antenn*  blackish  brow  u;  arista 
thin,  bare.    Face  concealed  beneath  dense  pray  pollen,  on  the  sides 

*  AoXtof,  deceitful;  a<>pifo^,  a  small  winged  insect. 


SYNOPSIS   OF    NORTH    AMERICAN   SYRPHID^. 


179 


more  ochraceous,  an  elongate  median  spot,  and  the  cheeks  in  front, 
shining  black;  in  profile  gently  concave  below  the  antenntc,  the  tubercle 
nose-like,  frontal  triangle  very  projecting  in  profile,  obtusely  angulated 
iu  the  middle;  shining  black,  with  biack  pile;  the  white  dust  of  the  face 
extends  up  narrowly  along  the  eyes.  Dorsum  of  tiiorax  opaque  black, 
the  anterior  border  and  a  narrow  transverse  band  on  the  suture  gray- 
ish-yellowish poUinose,  in  front  of  the  scutelluni  a  broad  subquadnite 
area  shining,  deep  metallic  blue.  Pleurai  thickly  grayish  jjollinose  be- 
low; on  the  mesopU'iine  with  yellow  i)ile,  which  extends  up  to  the  end  of 
the  transverse  baml.  Scutellum  light  opaque  yellow  with  short  sparse 
black  pile;  iit  the  base  rather  narrowly  opaque  black.  Abdomen 
brownish  blsick,  opacjue,  with  two  pairs  of  large  quadrilateral  yellow 
spots;  the  black  of  the  second  segment  is  a  little  broader  in  front,  an<l 
extends  outward  behiiul  rather  narrowly  and  a<aitely  to  the  lateral 
iiiarjiin  ;  spots  on  the  third  segment  subquadrate,  touching  the  anterior 
margin,  and  separated  by  about  their  own  width;  fourth  segment  with 
iibluish,  metallic,  subinterrupted,  shiningcross-band;  second,  third,  and 
fourth  segments  with  a  narrow  yellow  hind  margin.  Ilypopygium 
wholly  shining  black.  Legs  black,  tibia'  and  tarsi  reddish  brown. 
Wings  lightly  in fuvscate  on  distal  half,  and  with  an  obscure  brownish 
spot. 

Four  specimens,  New  Mexicio  {Mr.  G.  P.  Gaumer).     I  take  pleasure  in 
dedicating  this  beautiful  species  to  Prof.  C.  V.  Riley. 

ADDITIONAL  NORTH  AMERICAN  SPECIES. 

Doliosyrpbus  hirtipes  Hijjot,  Hull.  Soc.  Eiit.   ile  Fr.,  1^''^2;  Aiiii.  Soc.  Eut.  ck-  Fr., 

1883,  ;{4:{.     Paiiiuna. 
DoliosyrphuB  BCitellatua  Hi^ot)  Bulletin  Soc.  Eiit.  do  Fr.,  1882;  Ann.  Soc.  Ent.  <le 

Fr.,  18H:{,  Mi.     Paimiiiii. 


PTEROPTILA.* 

Pl'igiocera  Mticqiiart  (mm  King),  Dipt.  Exot..  ii,  2,  ;")!>,  184'2. 
Pteroptila  Loew,  Ccntur.,  vi,  fiO,  1865. 

Large,  robust,  nearly  bare  species,  with  bright  yellow  markings  of 
very  short  pile  on  thorax  and  abdomen.  Head  hemispherical,  a  little 
broader  than  the  thorax.  Eyes  in  male  contiguous,  bitr*' ;  iinteniiio 
Hiuall,  third  joint  oval,  first  two  joints  short.  Pace  nearly  i)erpen(li(;u- 
lar,  below  the  antc-nae  n  little  receding,  not  much  produced  below  the 
eyes,  very  slightly  tuberculate.  Thorax  somewhat  narrowed  in  front; 
scutellum  broad.  Abdomen  moderately  longer  than  tlu^  thorax,  the 
^ypop.Vt?ium  large,  unsymmetrical.  Legs  moderately  stout,  the  hind 
femora  considerably  thickened,  without  spines  or  protuiberances  below. 
Wings  dark  colored  in  front,  clothed  with  microscopic  ])ile  ;  the  third 
vein  bent  deeply  into  the  first  posterior  cell ;  marginal  cell  (closed  and 
petiolate;  anterior  cross-vein  beyond  the  middle  of  discal  cell. 

*  Rreijov,  wing,  and  nrMv,  plnniajfc. 


180    BULLETIN  31,  UNITED  STATES  NATIONAL  MUSEUM. 


l:\ 


i-d 


\\-.\. 


TABLE  OF  SPECIES. 

1.— Legs  black  ;  third  abdominal  segment  with  an  entire  yellow  cross-band,  the  firjt 

segment  without  yellow  spots oliicta 

The  four  front  legs,  at  least,  not  black ;  third  segment  with  a  pair  of  spots,  fint 
segment  also  with  yellow       ■ .2 

2.— Terminal  joints  of  the  tarsi  black  ;  the  dorsal  uutare  with  four  distinct  sp  cf 

v'«ooTa 
Tarsi  wholly  light  colored ;  spots  on  miturecoaluscunt  into  an  interrupted  band  3 
3. — Black  species ;  bind  femora  in  part  black  ;  abdomen  considerably  narrowed  pos- 
teriorly     crucigera 

Abdomen  and  head  yellowiMu  reudisb  ;  legs  without  black  ;  abdomen  moderately 
narrowed  posteriorly rufionu 

JPteroptila  crucigera.    (Plate  VIII,  tigs.  1,  la,  lb,  Ic.) 

f  MUesia  acuta  Fabricius, Syst.  Autl.,  189, 7 ;  Wiedemann,  Auss.  Zw.  Ins.,  ii,  110,8 

(translutiou  from  Fabricius). 
Mileain  cri>'->jera  Wiedemann,  Auss.  Zw.  Ins.,  ii,  lO.'S,  2. 
Mc'dota  mileniformi8  Macquart,  Hist.  Nat.  Dipt.,  i,  500. 
Plagioccra  crucigera  Macquart.  Dipt.  Exot.,  ii,  2,  fiO,  1 ;  nl.  x,  fig.  7. 

Habitat. — Georgia,  Florida,  Texas!  Yucatan  (Macq.). 

<?,9.  Length,  14  to  15'""'.  Antennaj  reddish  brown.  Face  yellow- 
iih  red,  thickly  clothed  on  the  sides  with  whitish  pollen  and  bright  yel- 
low pile ;  a  broad  median  stripe  and  the  cheeks  shining  black,  some- 
times reddish.  Front  in  female  narrow  above,  with  a  broad  black 
stripe,  yellow  pilose  on  the  sides  below  the  ocelli ;  frontal  triangle  with 
a  slender  triangular  black  spot;  posterior  orbits  with  abundant  short 
yellow  pile.  Thorax  black,  but  little  shining,  in  front  with  two  opaque 
black  stripes,  not  reaching  the  suture;  clothed  with  very  short  black 
pile  and  with  markings  of  short,  thick,  bright-yellow  pile  as  follows: 
an  oval  spot  on  each  side  of  the  middle  in  front ;  a  fascia  extending 
along  the  suture,  broadly  interrupted  in  the  middle  and  continued  oat 
wardly  to,a  spot  on  the  steruopleurae ;  another  transverse  fascia  ex- 
tends across  in  front  of  the  scutellura,  narrowed  on  the  sides  before 
reaching  the  spots  on  the  post-ahir  callosities ;  the  anterior  spiracles 
just  below  the  humeri  are  light  yellow,  and  the  posterior  pair  on  the 
sides  of  the  inentanotum  white.  Scutellum  yellowish  on  its  border. 
Abdomen  black,  somewhat  Rhiniug;  the  first  segment  and  anterior  i)art 
of  second  opaque;  first  segment  with  a  pair  of  oval  spots  of  yellow 
pile  on  the  hind  part;  second  segment  with  narrow  posterior  yellow 
marf{in ;  third  8i„ment  with  a  yellow  pilose  spot  on  each  side  in  front, 
and  a  quite  narrow  yellow  hind  margin  ;  fourth  segment  similar,  but 
the  spots  smaller,  and  the  hind  margin  very  narrow  or  obsolete.  Hy- 
popygium  shining  reddish  brown,  .slightly  yellowish  pollino.se.  Leffs 
light  reddish  yellow,  the  hind  femora  in  large  part  blackish.  Wiug.* 
on  the  basal  portion  in  front  as  far  as  the  cross-veins  yellowish;  beyond 
dark  brown,  filling  out  the  sub-costal,  the  marginal,  submargiual,  outer 
part  of  first  basal,  and  the  anterior  part  of  first  posterior  cells. 

Five  specimens. 


SYNOPSIS    or    NORTH    AMERICAN    SYRPHID^. 


181 


In  specimens  illy  preserved  the  yellow  pile  markings  of  the  abdomea 
or  thorax  may  be  wholly  rubbed  off,  leaving  only  indistinct  whitish  spots 
in  their  place.  The  second  segment  may  also  show  an  elongate  reddish 
spot  on  each  side  near  the  middle. 

Pteroptila  decora. 

Pteroptila  decora  Loew,  Ccntur.,  vi,  59. 

Hubitat. — Cuba ! 

^  ,  9  .  Length,  9  to  12""".  Black.  Head  of  the  same  color,  post^^rior 
orbits  thickly  fringed  with  yellow  pile,  or  tomentum.  Front  yellow  pi- 
lose ;  vertex,  and  median  stripe  black.  Antennae  ferruginous;  third 
joint  t'hort  ovate,  above  blackish.  Face  thickly  clothed  with  white  pol- 
len and  yellow  pile,  leaving  a  median  shining  black  stripe ;  cheeks 
broadly  shining  black,  except  the  posterior  part.  JJorsum  of  thorax 
with  nine  yellow  spots  as  follows :  Two  on  the  front  margin,  four  on  riie 
transverse  suture,  and  three  sub-coalescent  ones  on  the  posterior  mar- 
gin. Scutellum  reddish  or  reddish-black,  black  at  the  base.  Abdomen 
with  six  yellow  spots,  namely,  two  subarcuate  ones  on  the  first  seg- 
ment, and  two  larger  ones  on  the  anterior  angles  of  the  third  an<l  fourth 
segments.  Hypopygium  brown.  Legs  luteous,  or  brownishliiteoiis; 
outer  part  of  the  hind  femora  subfuscous  or  fuscous,  the  extremt';  tip, 
however,  always  lighter  colored;  last  three  or  four  joints  of  aU  the 
tarsi  black.  Wings  hyaline,  brown  on  the  front  part;  as  far  as  the  tip 
of  the  auxiliary  vein  the  color  is  more  yellowish,  the  costal  cell  espe- 
cially so. 

Two  specimens. 

Pteroptila  I  uficrus. 

MiltHia  riijicrns  \Vi«!(lemann,  Auss.  Zw.  Ins.,  ii,  105,  3. 

Uahitat.—Ci\hR ! 

3,9.  Length,  12  to  IS™"".  Brownish-yellowish,  the  dorsum  of  tho- 
rax blackish  brown.  Vertical  triangle  of  male  elongate.  Stripe  of 
front  and  face  shining  brownish-yellow,  the  pile  on  the  sides  and  pos- 
terior orbits  light  yellow;  cheeks  like  the  facial  stripe.  Antenine  yel- 
low, the  third  Joint  somewhat  brownish.  Yellow  |)ilose  niarkijigs  of 
the  thorax  as  in  P.  crucigera'j  that  is,  with  two  anterior  spots,  an  in- 
terrnptod  sntnral  cross-band,  and  three  sub-coalescent  spots  on  tlie  hind 
liorder.  S(uitellum  yellowish-brown.  Abdomen  with  a  pair  of  (ioaies- 
oent,  arcuate,  yellow  i)ilose  spots  on  the  first  segment,  a  slender,  nearly 
MHitiguous,  i)air  on  the  anterior  border  of  the  third  segment,  and  a 
smaller  pair  on  the  sides  of  the  fourth  ;  second,  third,  and  fourth  seg- 
ments each  with  a  slender  yellow  hind  margin  ;  in  color  the  abdomen  is 
dark  ferruginous  or  yellowish-red.  Letfs  yellow,  or  somewhat  ri'tldish- 
jellow,  the  hind  femora,  except  the  basal  portion  and  tii),  retldish  or 
brownish  red.  Wings  light-brown  on  the  anterior  part,  hyaline  behind; 
on  the  basal  portion  the  brown  is  much  more  dilute  or  yellowish,  the 
coistal  cell  light  yellow. 


l! 


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i' ' 


. 


182 


BlfXKTlN   ;]1,    UNITED   STATES    NATIONAL   MUSEUM. 


t" 


.  ,.i 


Two  specimens  (G.  V.  Gamner). 

This  species  chiett.v  «liffei's  fronj  P.  crucigera,  in  its  more  yellowish 
reddish  color  throughout  (most  noticeable  in  the  abdomen,  facial  stripe, 
hind  femora,  etc.),  in  the  yellow  pollinose  spots  of  the  first  abdominal 
segment  being  united,  and  in  the  female  abdomen  being  less  narrowed 
behind. 

Pteroptila  cincta. 

Muxcaciiicta  Driiry,  Iuh.,  i,  109;  pi,,  xlv,  Hg.  (5. 

SyrjihiiK  pingiiis  Fahricius,  8y8t.  Eiit.,  76'^,  (J;  Ent.  Syst.,  iv,  262,  16. 

EriataUs  piiifjitis  Fabricins,  Syst.  Autl.,  233,  6;  Wiedemann,  Anss.  Zw.  Ins.,  ii, 

lim,  61. 
Milesia  Ania  Wiilkor,  List,  ete.,  iii,  .564  ;  Macquart,  Dipt.  Exot.,  .')er  Siippl.,  94, 9 

Habitat — San  Domingo! 

9  ,S  .  Length,  17  to  19"""'.  Black.  Eyes  of  male  broadly  contignou-s. 
Front  of  female  black,  shining,  narrowly  white  pollinose  on  the  sidis 
below.  Cheeks  and  a  broad  facial  stripe  shining  black ;  the  sides  of 
the  face  densely  white  pollinose  and  thinly  white  pilo.se.  Antenna?  black, 
Posterior  orbits  white  pollinose  and  pilose.  Thorax  opaque  black,  with 
bright  yellow  markings  of  short  dense  pile,  as  follows:  Two  rounded 
spots  on  the  front  margin,  one  on  each  side  at  the  outer  ends  of  the 
transverse  suture,  coalescing  with  larger  one  on  the  mesoplenrai,  one  of 
longer  pile  on  each  post- alar  callus,  connected  by  a  transverse  one  in 
front  of  tho  scutoUum.  Tegnlfe  light  yellow,  fringed  with  yellow  pile, 
Scutellum  deep  brownish-red,  black  at  the  base.  Abdomen  Dpaquo 
black,  sometimes  tinged  with  red ;  second  segment  with  a  pair  of  large. 
deeply  opaque,  red  triangles :  third  segment  in  front  with  an  entire 
cross-band  of  bright  yellow  pile,  very  slightly  emarginate  in  the  middle 
behind ;  fourth  segment  with  a  small  si)Ot  on  each  side  of  the  same  col 
ored  pile;  in  the  female  a  small  triangle  on  the  third  segment  behind, 
two-thirds  of  the  fouith  segment,  and  the  fifth  segment  wholly,  deep 
shining  bluish-green ;  in  the  male  the  larger  part  of  the  fourth  segiiieiit 
and  the  very  large  hypopygium  are  shining  brownish-red.  Legs  dt'ep 
black,  the  pulvilli  light  yellow;  in  the  male  on  the  posterior  sides  of 
the  front  and  middle  femora  with  thick  black  pile.  Wings  hyaline, 
rather  narrowly  brownish  along  the  front  border. 

Five  specimens  (Frazar.) 

Pteroptila  zonata. 

PleropHla  iouata  Loew,  Centur.,  vi,  60. 
Habitat. — Mexico  (Lw.) ! 

i  .  Length,  13.5""".  Black,  opaque,  sides  of  the  face  white  polli 
nose ;  two  spots  on  the  anterior  margin  of  the  thorax,  the  transverse 
suture,  the  posterior  margin  of  the  thorax,  and  a  basal  abdominal  fas- 
cia, white  tomentose ;  fascia  of  the  second  abdominal  segment  livid;  oii 
each  of  the  following  segments  a  basal,  yellow  tomentose  fascia;  hypopv 
gium  yellow  pollinose;  wings  hyaline,  stigma  and  the  marginal  and 
submarginal  cells  blackish. 


SYNOPSIS    OF    NORTH   AMERICAN    SYRPHID.E. 


183 


Bhick,  oi)aqne.  Head  of  the  same  color,  the  hiteral  margins  of  the 
front,  and  the  face,  except  the  median  stripe,  white  pollinose.  Antennae 
black,  third  joint  ovate.  Scutellum  livid,  near  the  base  bhick.  First 
segment  of  the  abdomen,  except  the  base,  white  poUiuose;  second  seg- 
ment with  a  livid  fascia,  narrowly  intenupted,  toward  the  sides  strongly 
dilated,  but  abruptly  cut  off  before  reaching  the  margin,  hind  margin 
yellow;  the  two  following  segments,  each  with  a  narrow  basal  fascia 
yellow  tomentose,  and  the  posterior  margin  vitelline  yellow.  Hypopy- 
friura  thickly  clothed  with  vitelline  pollen.  Legs  vitelline  yellow ; 
front  femora  wholly,  the  base  of  the  middle  femora,  and  the  bind  fe- 
mora, except  che  distal  third,  black ;  the  hind  femora  black  setulose 
below,  elsewhere  the  legs  wholly  clothed  with  light  pile.  Wings  pure 
liyaline,  all  the  veins  fnscous-black,  stigmatic  cell,  the  marginal  and 
siibmargiual  cells  blackish. — Translation. 

ADDITIONAL  NORTH  AMERICAN  SPECIES. 

Pteroptila  pratorum. 

Siirphus  pratorum  Fabricius,  Syst.  Eut.,  765,  13;  Ent.  Syst.,  iv,  286,  31.     West 
Indies. 

Eristalia  pratorum  Fabricius,  Syst.  Ant.,  236,  18;  Wiedemann,  A.  Z.,  ii,  166. 

Pteroptila  opulentus  Bigot,  Ann.  Snc.  Ent.  de  Fr.,  836  (EristalU).    Caba. 


HELOPHILUS/ 

Elophilua  Meigen  in  Illigfra  Magazine,  ii,  274,  1803. 
AsmxoBytphus  Bigot,  Bull.  .Soc.  Eut.  deFr.,  No.  13,  18^2. 

Eurhimyia  Bigot,  Bull.  Soc.  Eut.  de  Fr.,  No.  2,  1883. 

Mostly  large,  nearly  bare  species,  black  or  blackish  brown,  with  yel- 
low spots  or  bands,  usually  readily  distinguished  by  the  presence-  of 
lij;ht  poUiuose  stripes  on  the  dorsum  of  the  thorax ;  head  hemispherical, 
not  flattened.  Antennae  short,  the  third  joint  oval ;  arista  basal,  bare. 
FiUic  below  the  antennae  in  profile  gentlj'  or  considerably  excavated,  the 
lower  part  sometimes  strongly  pre' need,  usually  with  a  tubercle;  eyes 
b;ue,  rarely  pilose,  separated  by  a  rather  broad  interval  in  the  male. 
Scutellum  usually  more  or  less  translucent.  Abdomen  sometimes  rather 
broadly  oval,  often  more  or  less  narrowed,  sometimes  cylindrical.  Legs 
rather  stout;  the  hind  femora  more  or  less  thickened,  and  the  hind 
tibise  arcuate;  hind  coxaj  in  the  male  rarely  with  a  spinous  tubercle  be- 
low. Marginal  cell  of  the  wings  open ;  the  third  longitudinal  vein  deeply 
bent  into  the  flrst  posterior  cell;  small  cross-vein  oblique,  beyond  the 
middle  of  the  discal  cell. 

See  Appendix. 


"HA.10C,  the  sun,  and  ipi'Aof,  a  lover. 


184 


BTLLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 


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HelophlliM  glaoialUi. 

HelophiluB  gtacialiB  Loew,  Stett.  Ent.  Zeit.,  1843,  1'^. 

Habitat. — Labrador  (Lw.)  I 

9 .  Length,  12.5  to  13""".  Face  deeply  concave  below  the  antenna), 
below  strongly  produced,  tubercle  large,  in  profile  much  receding ;  the 
lower  border  forms  with  the  posterior  border  of  the  head  an  obfusf 
angle;  in  the  middle  a  broad  shining  black  stripe,  gray  dusted  above, 
but  reaching  to  the  bjise  of  the  antennae ;  elsewhere  as  on  the  greater 
part  of  the  front  covered  with  whitish-yellow,  sometimes  more  grayish- 
vellow,  pollen ;  cheeks  shining  black.  AntennoD  black;  immediately 
above  their  base  a  shining  black  spot;  vertex  blackish,  the  middle 
line  of  the  front  sometimes  dark ;  pile  of  tlie  front  black,  on  the  ver- 
tex in  moderate  extent  yellowish.  Thorax  opaque  black,  the  usnai 
light  stripes  grayish-white,  the  front  half  of  the  lateral  ones  and  the 
posterior  part  of  the  middle  ones  indistinct ;  pile  of  the  dorsum  wholly 
yellow.  Scutellum  yellowish-brownish,  shining;  wholly  yellowish  pilose. 
Abdomen  black,  wholly  shining  on  the  dorsum ;  on  the  second  sfgriient 
on  eacn  side  there  is  a  large  yellow — usually  three-corneretl — spot,  of 
which  the  point  that  is  directed  inward  is  usually  somewhat  whitish 
colored,  and  is  narrowly  separated  from  the  opposite  one;  on  tin-  third 
segment  on  each  side  a  narrow  whitish  arcuate  band,  which  starts  from 
a  small  yellow  spot  on  the  anterior  angle  of  the  segment;  on  the  tourtli 
segment  the  same  whitish  semi-fascia,  but  no  indication  of  the  yellow 
spot;  on  the  last  segment  the  bands  also  present,  but  somewhat  shorter 
and  less  distinct;  the  pile  on  each  segment  in  front  is  whitish,  beliird  the 
bands,  bb^ckish;  on  the  lateral  margins  ofeachsegnjent  the  whitish  yellow- 
pile  reaches  farther  back,  so  that  on  the  posterior  angles  only  a  trace 
of  the  blackish  pile  remains.  Venter  shining  black,  beset  with  spurse. 
obscure  whitish  pile.  Femora  black,  the  hind  pair  of  moderate  broa<lth. 
tbe  tip  of  all  yellow ;  tibiaj  black,  basal  third  of  the  hind  pair,  imd 
rather  more  than  a  third  of  the  front  and  middle  pairs  yellow,  the  hind 
pair  moderately  bent,  and  not  thickened  at  the  end,  the  tarsi  tliroujih 
out  black.  Wings  hyaline,  somewhat  grayish  brownish  ;  stigma  liyiit 
brown,  scarcely  darker  at  the  base ;  the  longitudinal  vein  behind  tin- 
anal  cell  is  somewhat  strongly  arcuate  near  its  end,  the  last  section  ol 
the  same  vein  strongly  bent. 

Is  intermediate  in  position  between  H.  groenlandieus  and  H.  borealix. 
From  the  former  is  distinguished  (1)  by  the  much  more  retreating  face, 
(2)  by  the  lack  of  black  pile  on  the  posterior  end  of  the  black  thoracic 
stripes  and  the  fore  part  of  the  scutellum,  (3)  by  the  indistinctness  of 
the  light-colored  thoracic  stripe.-^,  and  the  somewhat  more  distant  posi 
tion  of  the  two  middle  ones,  (4)  by  the  shining  color  of  the  abdonieu, 
which  in  groenlandievs  is  confined  to  the  posterior  jiart  of  the  segments, 
(5)  by  the  greater  slenderness  of  the  abdominal  bands,  ((J)  by  the  some- 
what less  width  of  the  hin<l  femora,  and  the  yellow  tips. — Loew,  1.  c. 


■'  -y 


SYNOPSIS    OF   NORTH   AMERICAN    SYRPHID-fi. 


185 


Belophllus  groenlandlous. 

Tabanm  ijroenlandicita  O.  Fabricius,  Fauna  Groeiilaiid.,  208,  170. 
IIehphUu8  arc<«ctt«  Ztittcrstcilt,  InH.  Lapp.,  r)S»5, 2;  Dipt.  Suuud,  67(j, 2 ;  Staeger, 
Kroycr's  Tidsskrif.  N.  K.,  i,  :{.->9,  24;  Lchjw,  Stett.  Eiit.  Zeit.,vi,  119,  1843. 

Habitat. — Greeuhiud,  Lapland  (Lw.) ! 

i,9  .  Length,  11  to  12"'"'.  Fact'  helow  the  antennje  lightly  excavated, 
below  only  si  little  produ(!ed,  the  tubercle  slight,  in  profile  nearly  per- 
pendicular ;  the  lower  line  of  the  head  ioruis  with  the  occipnt  but  little 
more  than  a  right  angle;  in  the  middle  of  the  face  with  a  shining  black 
stripe,  which  in  well-preserved  exaniple.s  does  not  roach  quite  to  the 
antennae  ;  elsewhere  on  the  face,  ^s  also  on  the  greater  i)ortion  of  the 
front,  covered  with  whitish-yellow,  sometimes  somecvhat  darker,  pollen; 
cheeks  shining  black.  Antennte  black,  immediately  above  tlieir  base 
with  a  shining  black  spot ;  a  median  stripe  of  the  front  and  the  regioii 
of  the  vertex  dark,  nearly  blackish  ;  pile  of  the  front  black,  at  the  ver- 
tex yeliowisii.  Thorax  opaque  black,  the  usual  light  colored  stripes 
nearly  whitish,  the  lateral  ones  only  distinct  at  the  humeri,  behind  in- 
distinct; the  median  ones  very  narrow,  linear,  very  distinct,  in  all  the 
specimens  broken  off  before  reaching  the  scutellum;  the  pile  of  the 
thorax  is  yellow,  blackish  onlj'  on  the  posterior  part  of  the  dark  stripes. 
Scutellum  brownish,  shining,  in  front  with  black,  behind  with  yellow, 
pile.  Abdomen  black,  opaque,  only  a  little  shining  on  the  hind  margins 
of  the  segments,  successively  a  little  broader  towards  the  hind  part;  on 
the  second  segment  with  a  large,  yellow,  nearly  a  three-cornered  spot  on 
each  side,  the  inner  angles  of  which  are  usually  whitish  and  apj)roach 
each  other  moderatelj"  near;  on  the  third  segment  there  is  on  each  side 
a  narrow,  yellowish-whitish  curved  semi"  fascia  which  terminates  in  a 
small  yellow  spot  in  the  anterior  angle  of  the  segment,  which  often  in  the 
male  has  a  greater  extent ;  on  the  fourth  segment  are  seen  the  same  yel- 
lowish-whitish semifasciie  but  no  trace  of  the  yellow  spots;  on  the  last 
segments  the  spots  are  smaller  and  less  fasciate.  The  pile  in  front  ot  the 
hind  margin  of  the  fasciai  is  yellowish,  from  thence  to  the  hind  margin 
of  each  segment  bhujkish ;  on  the  lateral  margins  the  yellow  pile  ex- 
tends somewhat  farther  back,  the  hind  angles,  however,  always  more  or 
less  black  ])ilose.  Femora  black,  hind  pair  moderately  dilated ;  front 
pair  at  the  extreme  tip  brownish  yellow,  on  the  hind  pair  there  is  a  trace 
of  the  same  color  on  the  under  side  of  the  tip ;  tibisE  black,  with  the  base 
browuishyellow ;  hind  pair  ujoderately  bent  and  not  thickened  at  the 
extremity;  tarsi  black  througliout.  Wings  hyaline  with  a  grayish- 
brownish  tinge;  stigma  light  brown,  darker  at  its  beginning;  distal 
portion  of  sixth  vein  moderately  strongly  arcuate,  its  terminal  portion 
strongly  bent. 

Helophilus  borealis. 

HelophiliiH  horeaViH  StaigtT,  Kroyer's,  Tidnkrift,  N.  R.,  i,  :i.">9,  2.'>.     Loew,  Stett. 
Eiit.  Zcit.,  vi,  184:?,  p.  12:5. 

Habitat. — Greenland  (Lw.) ! 
5 .  Length,  12  to  13™"'.    Face  strongly  excavated  in  profile  below  the 


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BULLETIN    31,    LNITED    STATES    NATIONAL    xML'SELM. 


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aiittMiiiu!,  below  stroiiffly  produced  forwards,  the  tubercle  very  large;  in 
the  middle  with  a  broad,  shiniiiff  black  stripe,  reaching  to  the  base  of  the 
anteiirite  and  on  the  lower  half  oidy  slightly  grayish  diuste*! ;  elsewlK'n-, 
as  on  the  greater  part  of  the  front,  clothed  with  whitish-yellow  dust; 
cluH'lis  shining  black  ;  the  lower  border  of  the  cheeks  forms  with  ilic 
plane  of  the  occiput  an  obtuse  angle.  Antenuie  black;  imii.ediately 
above  theh-  base  a  shining  black  spot ;  the  vicinity  of  the  ocelli  black; 
the  middle  line  of  the  front  also  somewhat  darker ;  pile  of  the  front 
black  ;  at  the  vertex  in  moderate  extent  yellowish.  Thorax  opacjin- 
black,  the  usual  stripes  grayish,  very  narrow  and  indistinct,  in  the  mid- 
die  interrupted,  the  median  ones  obsolete  behind.  The  pile  of  the 
thorax  is  yellowish  throughout,  without  any  intermixture  of  black. 
Scutellum  brownish,  shining,  on  the  middle  with  blackish,  on  the  bor- 
der with  yellow  pile.  Abdomen  black,  opaque,  the  hJnd  margins  of  the 
segments,  successively  wider  posteriorly,  moderately  shining;  second 
segment  on  each  side  with  a  large,  yellow,  three-cornered  spot,  tiii' 
inner  angles  of  which  show  only  a  trace  of  whitish  color,  and  do  not 
approach  each  other  very  closely;  third  segment  on  each  side  witli  ii 
curved,  narrow,  semi-fascia,  not  quite  reaching  the  lateral  margin,  at 
which  there  is  no  trace  of  a  yellow  spot;  fourth  segment  with  siinilai 
M'hitish  semi  fascit".,  which  attain  the  lateral  margins;  on  the  last  sejr. 
ment  they  are  shorter  and  less  distinct.  The  pile  of  the  abdonien  is 
thick,  erect,  noticeably  longer  than  in  the  related  species,  of  a  yellow 
color,  on  the  hind  margin  of  the  second  segment  somewhat  darker,  on 
the  hind  borders  of  the  following  segments  in  nioderate  extent  blackisli; 
on  the  lateral  margins  of  the  abdomen  the  i)ile  isthnmghout  yellowish, 
only  on  the  posterior  angle  of  the  posterior  segments  is  there  auy  black- 
ish pile.  Femora  black,  the  hind  i)air  of  moderate  width  ;  in  all  the  ti]i 
is  brownish-yellow,  in  the  hind  pair,  however,  only  at  the  extreme  tip ; 
tibij«  black,  base  brownish-yellow,  the  hind  pair  but  little  arcujite,  at 
their  end  slightly  yet  distinctly  thickened  ;  varsi  black  throughout. 
Wings  hyaline,  somewhat  grayish-brownish  tinged;  stigma  dark  brown, 
sharply  bordered  at  each  end. 

II.  borealis  is  distinguished  from  E.  grcenlandicvH  by  the  more  oblique 
profile  of  the  face,  by  the  greater  length  of  the  j>ile  on  the  thorax,  scu- 
tellum and  abdomen,  by  the  absence  of  black  pile  on  the  hind  part  of 
the  black  dorsal  stripes,  by  the  greater  indistinctness  and  more  remote 
•position  of  the  median  light-colored  stripes,  by  the  less  dilatation  of  the 
hind  femora,  which  in  the  females  on  the  distal  half  on  the  outer  side 
has  a  distinct  longitudinal  groove,  while  in  H.grccnlandicus  there  is  only 
a  large  flat  impression. — Loew,  1.  c,  translation. 

Helophilus  mexicanus.    (Plate  VIII,  fig.  7.) 

Jlelvphiluv  mcxicaniia  Macqnart,  Dipt.  Ex(>t.,ii,  "2,  (>4,  6;  tab.  ii,  fig  2;  Osten 

Sackeii,  Cat.  Dipt.,  p.  267. 
Helophihiif  poljjgrammiin  Loew,  Centnr.,  x,  "5;  OBten  Sacken,  Weflt.  Dipt.,  :t38. 
Aaemosyrphns  oculiferna  Bigot,  Aiinales  See.  Ei^t.  Fr.,  1883,  p.  JUiO.     (Male.) 
f  Asemoayrjihua  nigroavutatua  Bigot,  ibid.,  p.  351. 

Habitat. — Washington  Territory,  California!,  Mexico  (Macq.,  O.  S.). 


.'.:.:i 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


187 


$  ,  9  .  Leiij;tli,  11  to  12""".  Fa<'e  with  a  sliort  deep  convexity  below 
the  auteuiia;  to  tip  ot'tuberde,  theiiee  leceiliiijj  in  a  nearly  straight  line 
to  the  oral  margin ;  median  tstrii>e  and  eheekH  bare,  black  and  shin- 
ing; the  siiles  of  the  face  concealed  beneath  dense  whitish-yellowish 
pollen  and  pile.  Antennje  black,  the  arista  red<lish-yellow.  Front  in 
both  sexes  very  broad,  in  the  male  narrowed  a  little  before  the  ocelli, 
in  the  female  broader,  only  a  little  narrowed  toward  the  vertex ;  the 
ocelli  in  both  sexes  are  remote  from  each  other;  the  color  is  shining 
black  above  ami  in  the  n^iddle  below  near  the  antennic,  yellowish  pol- 
liiiose  on  the  sides  and  across  broadly  below  the  ocelli ;  the  pile  is  yel- 
lowisli,  except  a<',ro8s  below  the  ocelli,  and  at  the  vertex,  where  it  is 
bhick.  Dorsum  of  thorax  grayish-olivaceons-black,  but  little  shin- 
ing,', leaving  in  the  middle  part  six  slender  opa<pie  black  lines,  that 
inclose  three  slender  whitish,  stripes,  all  of  which  are  obsolete  before 
tlie  scutelbim  ;  the  outer  black  lines  are  a  little  dilated  before,  and  inter- 
ru|»ted  at  the  suture ;  in  addition,  on  each  side  behind  there  is  a  slender 
npacpie  black  stripe,which  runs  from  the  scutellum  towards  the  outer  end 
of  tlie  suture.  Pile  of  thorax  yellowish,  rather  at)undant ;  Miore  whitish 
on  the  pleune.  Scutellum  obscurely  reddish  on  the  outer  part.  Abdo- 
men broad,  wot  extending  beyond  the  wings;  in  the  female  black,  the  ttrst 
sediment  shining,  with  an  opaque  spot  on  each  side;  second  segment  on 
e;ich  side  with  a  broad,  nearly  opaque  spot,  extending  across  the  front 
margin,  bordered  behind  on  the  sides  by  a  light  reddish-yellow  spot 
that  reaches  from  the  anterior  angle  to  the  middle  of  the  segment,  ex- 
tending as  a  narrow  whitish  pollinose  cross-band  inwards  and  separated 
from  that  of  the  other  side  by  a  not  very  broad  opaque  black  interval; 
j.osterior  part  of  the  second  segment  shining,  the  narrow  hind  margin 
.i; ray,  as  on  the  following  segments;  third  segment  with  two  slender, 
gray  pollinose  spots,  beginning  at  the  front  angles  and  curving  back- 
wards, inwards,  and  then  a  little  forwards,  broader  at  the  inuir  ends, 
and  separated  from  each  other  by  a  narrow,  partially  opaque,  interval ; 
in  front  of  these  spots  the  black  is  sub-opaque,  elsewhere  shining;  fourth 
segment  similar,  but  the  spots  more  slender  and  nearly  touching  the 
front  margin  on  their  inner  ends,  thus  leaving  on  each  side  in  front  a 
small,  opaque,  semi-lunar  si)ot.  In  the  male  the  abdomen  is  iu  large 
part  dark-reddish ;  on  the  third  segment  the  color  is  almost  wholly  red, 
brownish  behind,  the  gray  spots  nearly  obsolete,  leaving  only  the  be- 
ginnings and  tips;  the  fourth  segment  like  that  in  the  female,  but  the 
opaque  parts  are  more  brown,  and  the  shining  part  red.  Hypopygiuni 
wholly  reddish.  Legs  black  ;  the  base  and  tip  of  four  front  tibije  nar- 
rowly red,  the  hind  tibiie  variegated  black  and  red  ;  all  the  tarsi  more 
brown ;  metatarsi  of  the  hind  feet  distinctly  swollen.  Wings  nearly 
hyaline. 

Six  male  and  seven  fenuile  specimens,  California  (O.  T.  Baron),  Wash- 
ington Territory  (H.  K.  Morrison). 


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188         BULLETIN   31,    UNITRD   STATES   NATIONAL    MUSEUM. 

Helophilua  latlfrons. 

IlelophHun  latifroM  Loew,  Cflntnr.,iv,  73;  Oaten  Sacken,  Wrst.  Dipt.,3:)7, 
Habitat. — MuHsachuHottH,  Connecticut,  Western  Kannas,  Wyoming, 
Wushiugtoii  Territory,  Montana,  Oregon,  California!,  Ked  River  of  the 
North  (O.  S.) 

3,9.  Length,  13  to  15'"™.  Face  >  ellow,  tliickly  covered  with  light 
yellow  pollen  and  pile,  leaving  in  the  middle  a  moderately  broad,  shin 
ing,  reddish-yellow  Htripe,  which  end.s  acutely  a  little  below  the  anti'ii 
nee;  the  lower  end  at  the  oral  margin  black.  Cheek  black,  Hhinin^;. 
pollino8e  behind.  In  profile  the  face  is  moderately  concave  abovo,  from 
the  tubercle  to  the  oral  margin  nearly  perpendicular  and  straight ;  the 
lower  border  of  the  cheeks  forms  with  the  plane  of  the  occiput  but  lit- 
tle more  than  a  right  angle.  The  front  in  the  male  is  broad  above,  in 
width  fully  equal  to  half  the  distance  between  the  Toremost  ocellus  and 
the  base  of  the  untennse  ;  across  the  ocelli  black,  a  little  shining,  with 
black  pile;  below  "^he  front  ocellus  the  black  color  is  concealed  beueatii 
dense  yellow  pollen,  and  wholly  yellow  i)ile,  a  small  triangle  above 
the  base  of  the  antennae  shining,  reddish  or  brownish  yellow.  Scutel- 
lum  wholly  translucent  yellow,  on  the  outer  part  sparsely  and  shortly 
black  pilose,  but  chiefly  yellow  pilose.  First  abdominal  segment  gray- 
ish poUinose,  with  a  black  spot  near  the  outer  part,  and  the  sides  yul 
low.  In  the  male  the  remaining  segments  as  follows :  Secon«l  segment 
with  a  broad  light-yellow  cross  band,  interrupted  in  the  middle,  leaving 
a  broad  flattened  triangle  in  front,  opaque  black,  connected  by  a  median 
stripe  with  a  narrow  posterior  shining  black  cross-band  ;  third  segment 
with  a  similar  yellow  band,  more  narrowly  interrupted,  touching  the 
front  margin,  rounded  on  the  inner  angles  behind,  and  leaving  a  broader 
posterior  shining  black  band ;  the  opaque  black  is  confined  to  a  semi 
circular  or  semioval  spot  in  the  middle  in  front,  separated  from  a  smaller 
one  behind  by  two  intervening,  oblique,  yellowish  pollinose,  transverse, 
nearly  contiguous  spots  ;  fourth  segment  narrowly  yellow  on  the  sides, 
across  the  middle  a  grayish-yellowish  pollinose  cross  band,  convex  in 
the  middle  in  front,  broadly  emarginate  behind;  the  black  shining ;  the 
posterior  margin  yellowish  ;  hypopygium  black,  concealed  beneath  dense 
yellowish  ])olIen.  In  the  female  the  shining  bla<;k  cross-bands  on  the 
posterior  part  of  the  second  and  third  segments  is  broader;  the  yellow 
cross-band  of  the  third  segment  is  narrower  and  more  broadly  separ- 
ated, connected  in  the  middle  or  nearly  so  by  yellowish  pollen ;  the 
black  spot  in  front  is  usually  not  oval,  but  forming  a  more  or  less  elongate 
band,  attenuated  on  the  sides,  but  not  reaching  the  lateral  margins ; 
the  next  segment  similar  to  that  in  the  male,  but  the  yellow  pollinose 
band  narrower  and  more  gently  biconcave;  fifth  segment  shining 
black,  with  a  yellowish  pollinose  cross-band ;  the  yellow  on  the  sides 
of  the  fourth  segment  in  both  sexes  may  encroach  on  the  ground  of  the 
cross-bands,  and  also  similarly  in  the  fifth  segment  in  the  female.  Legs 
yellow ;  base  of  front  and  middle  femora,  distal  end  of  the  front  tibiae 


SYNOPfe'IS    OF    NORTH    AMKRICAN    .SYKIMIID.K. 


180 


iiiul  tho  whole  of  the  front  tarMi,  the  tip  of  iniddlo  turHi  and  the  whole 
of  the  hiud  Ieg8,  except  the  diNtal  end  of  the  femora  and  the  ba^e  of 
tihiiu,  black;  tho  extreme  up  of  hind  femora  aKso  bhiek.  Win^'H  hyaline; 
8tif(nui  yellowish.  DorHum  of  thorax  densely  light  yellow  or  ochra- 
ceoiis  opaque,  with  three  sub-opaque  black  stripcH,  of  nearly  equal  width 
throughout,  tho  middle  one  a  little  broader ;  )>ile  yellow ;  ])U'une 
densely  gray  poUiuose. 

Twenty  male  and  as  many  female  specimens,  collected  chietly  from 
>'e\v  England,  where  it  is  the  most  common  species.  In  addition,  Bf- 
tt'cn  specimens  from  the  Rocky  Mountain  and  Pacific  regions,  and  twen- 
ty lour  from  Montana  (Professor  Comstock),  do  not  ditt'er  from  the  east- 
ern ones.  Both  this  and  the  following  are  closely  allied  to  H.  trivitatluH, 
Iiyhridu8,  and  penduhm  from  Europe. 

HelophUus  simllls.    (Plato  VIII,  lit,'.  *.'.) 

Uelophilug  aimilia  Macqtiart  (iion  CtirtiH),  Dipt.  Exot.,  ii,  2,04,7.     1842. 
Helophilua  fasciatus  Walker,  List.,  etc.,  iii,  005. 
Erislalia  deciaua  Walker,  Liot,  etc.,  iii,  (>14. 
UelophilHu  HuaurranH  Jueunicke,  Neiiu  Kxot.  Dipt.,  1)4. 

Habitat. — New  England,  Canada,  Indiana,  Kansas,  California! 

5,9.  Length,  13  to  15"™.  Very  closely  allied  to  H.  latifronH,  with 
which  it  may  be  readily  confounded.  It  will,  liowever,  be  at  once  distin- 
};iiished  by  the  front  of  the  male  being  much  narrower  above,  not  more 
than  a  third  or  fourth  as  wide  as  the  distance  from  the  ocelli  to  the  base 
(»f  the  antenna),  and  in  the  female  by  the  front  being  wholly  black 
pilose;  in  the  male  the  front  is  black  pilose  on  the  upper  half;  the  an- 
teuusB  are  lighter  colored,  red,  or  yellowish  red,  except  on  the  upper 
l)art  of  the  third  joint,  where  it  is  blackish ;  the  yellow  cross-bands  of 
the  second  and  third  abdominal  segments  are  not  as  broad,  and  the 
posterior  black  portion  is  broader;  ihe  hind  tibise  are  usually  red,  or 
brownish  red,  with  the  basal  third  yellow;  the  pile  of  the  scutellnm 
is  in  larger  part,  sometimes  almost  wholly,  blackish.  Otherwise  the 
species  scarcely  differs  from  latifrons. 

Ten  specimens  from  Connecticut,  Massachusetts,  Indiana,  Kansas, 
Canada,  and  a  single  male  from  California.  At  the  time  Macquart 
uamed  the  species  there  existed  another  H.  similis  Curtis  (Brit.  Ent. 
429,  5),  now  considered  a  synonym  of  -H.  pendulua,  and  hence  need  not 
interfere  with  the  present. 

HelophUus  laetuB.    (Plate  VIII,  fig.  6.) 

Helophilua  laetua  Loew,  Centur.,  iv,  77. 

Habitat. — Connecticut,  New  York!,  Wisconsin,  Illinois  (O.  S.). 

9.  Length,  cS..T  to  0"'".  Face  concave  below  the  antenna;  and  then 
gontly  convex  to  the  oral  margin,  wholly  yellow,  grayish-yellowish  i)ol- 
liiiose,  on  the  lower  part,  in  tho  middle,  a  narrow  shining  spot ;  cheeks 
black  but  not  extending  forward.  Front  black,  thickly  yellowish  i)olli- 
nose  and  wholly  black  pilose,  except  on  the  vertex.  Antenna?  yellow- 
ish red;    arista  black  at  the  tip.     Dorsum  of  thorax  opaque  blac^, 


!  ;i 


:,    1 


\h 


M 


190         HULLKTLN    SI,    I'NITKD   STATES   NATIONAL   MUSEUM. 

with  four  pfri«yisli-,v<'ll()wiKli  slripes;  the  niiddlu  pair  not  very  broiid, 
griulually  dilated  on  tliH  liind  part,  the  median  black  Htripe  liaH  in  tli(> 
n)i<ldlc  a  very  sIimhUt  prayiwh  pollinoHe  stripe,  obsolete  in  front  and  Ih- 
hind.    Scutellani  yellow,  narrowly  black  at  the  base  and  on  tiie  sides. 
Abdomen:  First  segment  pollinose,  except  a  black  spot  on  each  side; 
second  sejjfmeTit  witli  a  broad,  widely  interrupted,  yellowish-red  cross 
band,  the  ])osterior  nmrjj^in  narrowly  Hhining,  in  the  middle  with  a  ytl 
lowish  spot;  third  segment  similar,  the  croHS-band  very  narrowly  iiitt  r 
rapted,  with  a  moderately  broad,  biarcuate,  opaque  black  cross-baml 
behind  the  yellow,  posterior  margin  of  the  segment  narrowly  yellow. 
broadly  and  angularly  dilated  in  the  mi«hlle  and  yellowish  pollinose: 
ou  the  fourth  segment  the  yellow  band  is  less  wide,  entire,  touching  tiie 
front  margin  on  the  whole  length,  narrowed  in  the  middle,  behind  it 
an  entire  black  cross-band,  the  si<les  of  which  are  obli«pie;  posterior 
margin  more  broa<lly  yellow,  behind  the  black  an  entire  pollinose  cross 
band,  nanow  at  the  sides,  broad  in  the  middle;  fifth  segment  wholly 
l)ollinose,  the  margins  yellow.     Legs  reddish-yellow ;  base  of  front  aiid 
middle  femora,  an  incomplete  median  ring  on  the  hind  femora,  tip  of 
front  tibia!  on  the  inner  side,  end  of  hind  tibiic  and  an  incomplete  siil>- 
basal  ring,  and  the  hind  tiirsi,  bhuik  or  blackish.     Wings  nearly  hyaline. 

ff .  Face  and  lower  part  of  front  l)righter  yellow ;  front  above,  between 
the  ])arallel  orbits,  black,  lightly  pollinose,  with  black  pile,  below  on 
the  yellow  part  the  pile  is  yellow.  Stripes  of  grayish  pollen  on  the 
dorsum  of  the  thorax  narrowed,  almost  linear,  the  slender  line  in  liie 
middle  of  the  median  black  stripe  almost  indistinguishable.  Pile  of 
thorax  moderately  long,  yellow,  across  the  disk  of  tiie  scutellum  some- 
what intermixed  with  black.  Abdomen  :  ftrst  and  second  segments  as 
in  the  female,  except  that  the  yellow  cross-band  is  broader  and  a  littl<' 
less  widely  interrupted;  third  segment  with  two  large  yellow  sjMits,  nar- 
rowly separated  at  the  t';'s,  leaving  a  slender,  biarcuate  cross-baml  of 
opaque  black  behind,  narrower  than  in  the  female,  connecting  at  their 
inner  ends  with  the  triangular  or  semi-oval  spot  in  front,  which  is  less 
transverse  than  in  the  female;  the  fourth  segment  whol'y  grayish  polli- 
nose, except  a  very  slender,  biarcuate  black  cross-band,  connecting  in 
the  middle  with  a  small  spot  in  front,  hind  margin  yellow ;  hypopy 
gium  black,  wholly  pollinose.  Front  and  middle  femora  more  broadly 
black  at  their  base;  hind  femora  black,  except  narrowly  at  the  base, 
and  a  broad,  preapical  ring. 

A  single  male  specimen  from  Saratoga,  N.  Y.,  August  30,  on  meadow 
land,  and  a  female  from  New  Haven,  which  undoubtedly  belongs  to  the 
same  species,  although  the  black  of  the  femora  is  different  in  extent, 
and  which  in  the  male  does  not  agree  so  well  with  Loew's  description. 

Helopbilus  cbrysostomus.     (Plntc  VIII,  iig.  5.) 

ErMaliH  cln-yHoaiomiin  Wiedemann,  Ans^;.  Zw.  Ins.,  ii,  174,  30. 
lUhtphihts  chnjHOHlomiiH  OHten  Sacken.  Cut.  Dipt.,  13;}. 

Habitat.— :^v\y  England,  New  York!,  Georgia  (Wied). 


iM 


1 .  :^  \ 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPIIID.F,. 


191 


^  ,  9  .  Ij<'n^tli,  9..J  to  11""".  Kroiit  of  iiialo  not  broiul,  fli«^  n'u\vti  par- 
iillfl  on  upper  lialf;  on  t\w  Iow«m'  hiilf,  like  the  face,  of  a  Hue  lijfht 
;'(»I«UMi-.velIo\v,  with  yellow  Mihst  ami  pile,  not  at  all  sliiniiiK:  on  the 
upp'T  half,  in  front  of  the  oeelli,  thickly  covered  with  a  brownish-yellow 
(luHt,  the  ocelli  and  vertex  black,  shining,  and  narrowly  bla<!k  pilose, 
in  the  female  the  front  is  bnnuler,  and  wholly  clothed  witli  bhu-k  pile, 
more  abundant  across  the  middle  ;  the  ground  coh>r  is  shining  bla(;k, 
obscured  by  the  j)ollen,  which  is  less  nl>iiiulaiit  and  less  yellow  than 
ill  the  male.  Antenme  yellowish  red;  arista  re<l  at  base.  I''ace  gently 
concave  below  the  antennuj,  then  gently  convex  to  the  tip,  the  lower 
part  considerably  produced  <lownwards  ami  forwards;  below  shin- 
ing black  on  the  si<les,  back  below  the  <'yes  on  the  cheeks  obsitured  by 
pollen.  In  the  femaU'  the  yellow  color  of  rhe  face  is  (unicealed  be- 
neath more  whitish  pile,  so  that  it  does  not  havti  the  bright  <  ■>!oi  of 
the  male.  Dorsum  of  thorax  light  yellowish-olivaceous,  with  tliiee 
broad,  black,  opaque,  velvety  stripes,  rather  nairowly  separated,  but 
more  broadly  so  in  the  male  than  in  the  female;  the  outer  stripes  do 
not  reach  quite  to  the  front  and  ba(!k  margins  ;  pleura*  j)(>llinose.  Scu- 
tellum  shining  black,  the  border  red,  pile  yellowish.  Abdiunen  in  the 
male  slender,  narrowed  at  hind  part  of  the  second  segment,  yellowish 
and  ferruginous-red ;  first  segment  grayisli  ])()llinose,  except  a  small 
[iipot  near  the  outer  sides  behind,  continuous  with  the  anterior  angles  of 
the  black  on  the  next  segment;  second  segnient  broadly  velvety  black, 
extending  nearly  the  whole  width  of  the  segment  in  front,  thence  nar- 
rowed so  that  at  the  mi<ldle  of  the  segujent  it  does  not  occupy  more 
than  one-third  the  width ;  then  again  expanding,  usually  of  a  less  deep 
color  (sometimes  only  brown  or  ferruginous);  the  broad  himl  margin  of 
the  segment  shining  red,  the  long  lateral  triangles  are  yellowish,  along 
the  black  in  front  often  white  pollinose;  third  segment  sometimes 
wholly  and  uniforndy  red,  but  more  usually  with  a  brownish  or  blackish 
spot  in  front  in  the  middle,  and  a  diffuse,  indistinct,  brownish  (M'uss- 
band  before  the  broad  shining  hind  margin,  the  sides  in  front,  and  two 
spots  near  the  middle,  of  white  pollen,  an'  often  present;  fourth  segment 
with  a  pair  of  small  slender  spots  in  the  middle  in  front,  and  the  an- 
terior angles  whitish  pollinose,  the  extreme  hind  l)order  of  the  fourth 
and  tilth  segments  yellow.  In  the  female  the  abdomen  is  broader,  wh«)lly 
black,  with  grayish-white  cross-bands;  first  segment  wholly  dusted; 
second  segment  with  a  broad  shining  cross-band  behind,  elsewhere 
velvety  black,  except  the  oblique,  pollinose,  yellow  side-spots;  these 
spots  reach  along  the  sides  to  tb3  front  angle  of  the  segment,  obli(piely 
concave  in  front ;  third  and  fourth  segments  similar,  but  the  spots  are 
very  narrowly  separated,  beginning  at  the  anterior  angles,  concave  in 
front,  convex  behind,  the  shining  part  of  the  fourth  segment  is  some- 
what dusted ;  fifth  segment  wholly  pollinose,  except  a  narrow  black 
cross-baud,  in  front.  Basal  half  of  the  front  and  middle  femora,  hind 
femora,  except  the  base  and  a  preapical  ring,  the  distal  part  of  hind 


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192  BULLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 

tibisB  aud  the  last  four  joints  of  hiud  tarsi  black,  the  base  of  hind 
tibiae  and  their  metatarsi  more  brown ;  elsewhere  the  legs  are  reddish 
yellow,  liglitor  on  the  front  and  middle  pairs.  Hind  coxae  of  the  male 
with  a  long  stout  obtuse  process  below,  the  hiud  femora  below  near  the 
base  with  a  slight  protuberance,  hiud  tibise  with  a  sharp  spur  at  the 
tip;  all  wanting  in  the  female.    Wings  lightly  tinged  with  brownish. 

This  description  is  based  on  twelve  males  and  nearly  as  many  femalca 
that  I  caught  about  the  blossoms  of  Cornus  paniculata  in  the  latter  part 
of  June,  in  Connecticut.  From  the  color  of  the  legs  and  feet  and  head 
1  do  not  doubt  but  that  it  is  Wiedemann's  species;  he  must  have  been, 
however,  mistaken  in  the  sex  of  his  specimen ;  he  does  not  mention 
the  process  on  the  hind  coxsb.  In  the  female  there  is  but  a  slight  iiidi 
cation  of  this  process,  but  his  description  of  "rost  gelb"  will  not  apply. 

Belophilua  dlstinctus,  u.  sp. 

Habitat. — Connecticut,  Virginia,  Pennsylvania! 

S  ,  9 .  Leugth,  7.5  to  10'""'.  Very  closely  allied  to  H.  chrysostomus 
Wied.,  but  easily  distinguished  in  the  male  by  the  absence  of  the  mammi- 
form process  ou  the  hind  coxae  below,  and  in  the  female  by  the  black 
dorsal  thoracic  stripes  being  considerably  narrower  than  the  interven- 
ing gray  ones;  the  middle  black  stripe  may  be  dilated  in  front  by  a 
grayish  line.  The  face  in  the  male  is  less  yellow,  in  the  female  the 
ground  color  is  almost  wholly  black.  The  antennte  are  darker  in  color, 
the  first  two  joints  blackish.  The  black  stripes  on  the  dorsum  of  the 
thorax  are  narrower ;  in  the  female  very  narrow ;  in  the  female  the  pel- 
linose  spots  on  the  third  and  fourth  segments  of  the  abdomen  are  a 
little  broader  and  a  little  more  widely  separated.  In  the  male  ou  the  hind 
coxae  below  there  is  a  small  obtuse  projection,  similar  to  that  of  tliefe 
male  of  H.  chrysostomm ;  in  the  I'emale  they  are  rounded  below;  the 
spur  ou  the  end  of  the  hind  tibiae  is  less  acute.  The  species  is,  more- 
over, smaller  in  size. 

Four  specimens,  two  of  each  sex,  from  Connecticut.  The  species  I 
found  common  on  a  meadow  near  New  Haven,  but,  unfortunately,  not 
recognizing  it  as  distinct  from  H.  chrysostomufi,  1  neglected  to  collect  a 
greater  number  of  specimens.  The  color  of  tha  face  not  being  "  vergol- 
det "  and  the  antennae  darker,  not  "  rost  gelb,"  I  do  not  think  that  this 
cau  be  Wie«lemann's  species. 

Helophilus  modestus,  n.  sp.     (Plato  VIII,  fig.  4.) 

Habitat. — Wyoming ! 

2,9.  Len^ith,  0  to  8  "•"'.  Front  in  both  sexes  broad,  narrowed  but  lit 
tie  ill  tiie  malt  the  ocelli  not  remote  from  each  other;  black,  with  a 
broad  bund  of  yellowish  pollen  across  the  middle,  pile  chiefly  blackish. 
Anteniue  black,  the  arista  of  the  same  color.  Face  deeply  concave 
below  tlie  antennae,  a  little  below  the  middle  with  a  large  protuberant 
tubercle,  between  which  and  the  mouth  receding  and  gently  concavf; 


SYNOPSIH    OF    XOKTH    AMI'.RICAN    SYUPIIID/E. 


io;i 


sliininj?  black  on  tho  ttihercit'  and  liclow  alonj;'  the  iiiuutb.  on  {ho  sides 
above  with  yeMowish  dust  and  ])iK'.  Cheeks  U'low  the  eyes  nioiU'rately 
l)road,  whitish  dusted.  Dorsum  of  tliorax  nearly  h.ue,  opaque  black, 
siiininji'on  the  sides,  in  tlie  middle  witii  a  slender,  on  each  sid(^  witii  a 
broader  };rayish-olivaceous  stripe,  a  little  broader  tlian  the  intervening' 
lijack  space,  all  continent  in  Iront  of  the  scntellnm.     I'leiira'  grayish  i)ol 

iiiosc.  Scntellnm  yellowish-red  on  the  mar;:;inand  with  yellowish  pih-. 
Abd'Huen  oval,  shorter  than  the  winj^s.  wholly  black,  except  a  inirrow 
yellow  hind  border  on  the  last  sryinents;  shinin.u;  in  the  female  on  the 
sides  of  the  Hrst  segmeid,  second  sejiinent  alou<>  t  he  base  and  exteiidinjj 
hack  narrowly  in  the  muldle  to  nearly  the  hind  l)order,  oi>a(iue  black, 
[liurowed  on  the  sides  as  thou|;;h  by  an  interrni)ted  cross-baiul  ;  in  the 
male  the  lirst  segment,  except  the  sides,  the  second  segment,  except  the 
lateral  iind  i)osterioi'  marj^ins  (on  the  sides  in  the  middle  and  behind 
more  broadly),  and  the  third  sej^'ment  with  a  large  triangle  in  front,  its 
apex  near  the  hind  margin,  and  nesirly  truncated  by  a  slender  iuterrui)ted 
cross-band,  opjique  black.     Legs  black  ;  the  distal  end  of  all  the  femora 

the  hind  femora  at  the  tip  above,  however,  black),  and  narrow  base  of 
all  the  tibife  and  a  rather  broad  ring  near  middle  of  hind  tibia?,  yellow ; 
sometimes  rings  near  the  middle  of  front  and  middle  tibia's  less  distinctly 
yellow.     Wings  faintly  tinged  with  blackish. 

Three  male  and  one  female  8pe<!iineus  from  Como,  Wyoming  (alt. 
7.0(»(»  feet),  June  20. 

Helophilus  coiiostomus,  II.  N|>.  (I'liitc  \III,  lig.  ;}.) 
/  llvhijthiUix  nlquitiis  WalliiT,  I^ist,  olc,  iii,  (iOiJ. 
.'  IlilojiliilnH  .tiiaiisiH  WalJitT,  List,  i"ti'.,  iii,  tiC;',. 
Ildopliiiiis  rdiiKtiiH  Oslfii  S;ii'l<t'ii  (iioii  Fald. ),  Cat.  Dipt..  i:!4. 

Ihihlfaf. — Connecticut!,  Massachusetts,  Illinois,  Canada  (O.  S.). 

f  .9  .  Length,  S  to  !)""".  Front  yellowish-brown,  above  the  antenme 
iiHUc  yellow;  pile  black,  more  yellowish  above  and  below.  First  two 
iiints  of  the  anteinne  blackish-brown,  third  .j<tint  reddish-brown  or  red. 
Face  light  yellow,  with  similar  colored  ])ollen,  concave  for  a  short  dis- 
tance I)elow  the  antenuLe,  and  then  nearly  straight  to  the  tij),  the  lower 
part  of  the  face  much  i>r(Klm'ed  downward  and  forwanl  into  a  slender 
nearly  regular  coiu',  i)ointed  at  the  tip.  Cheeks  bla(;k,  extending  more 
narrowly  along  the  oral  margin  to  the  tip.  Dorsiitn  of  tiiorax  o|)a<|ue 
black,  with  a  broader,  lateral,  grayish  pollinose  stripe  and  two  narrow 
ilors.d  ones,  linear  in  the  Jnale;  a  little  broa'ler  in  the  female,  and  e.\- 
imiided  in  front  of  the  scutelluni  so  as  to  touch  each  other  at  the  tii)>. 
i'l(MUie  thickly  dusted  like  the  dorsal  stripes.  Scntellnm  brownish  yel- 
low or  yellowish,  translucent,  usually  more  or  less  black  along  the  base: 
|)ile,like  thatof  the  thorax,  grayish-yellow.  Abdomen  black,  with  yellow 
•iiid  grayish  |)ollinose  markings.  In  the  nnile  the  tirst  segment  opa(pU'. 
''.\cei)t  the  lateral  margins;  second  segment  with  a  large  yellow  spot 
on  the  sides,  extending  from  the  anterior  angles  nearly  to  the  jmsterior 
part,  inclosing  the  opaque  in  the  shape  of  a  goblet,  of  which  the  stem 
is  short,  .  quare,  and  rectangular,  the  base  forming  a  narrow  complete 


194 


BULLETIN    :h1,    I'NITED    STATES    NATIONAL    MUSEUM. 


! 


li  i' 


')^ 


'■:y\' 


,  ,*.<:i 


111 


fi 


cross-band;  the  inner  ends  of  the  yellow  spots  are  a  little  whitish 
dusted;  third  segment  with  two  large  yellowish-red,  subtriangular 
spots,  the  posterior  margin  straight,  more  or  less  indistinct,  their  inner 
end  whitish  pollinose,  separated  by  about  the  same  width  as  the  pre- 
ceding, the  inner  anterior  sides  a  little  convex,  the  front  ends  slightlv 
encroaching  on  the  second  segment,  the  narrow  hind  ujargiu  yellow, 
dusted  with  whitish  pollen,  which  expands  somewhat  in  the  middle; 
elsewhere  the  black  is  opaque ;  fourth  segmeut  on  the  front  half  shin. 
ing,  on  each  side  with  a  moderately  broad,  arcuated,  pollinose  s))ot, 
the  outer  end  attaining  the  anterior-angle,  posterior  border  yellow,  and 
before  it  with  a  cross-band  of  about  the  same  width,  subopaque  black ; 
the  yellow  is  pollinose,  encroachiu'^  somewhat  on  the  black  in  the  mid 
die.  In  the  female  the  color  of  the  abdomen  is  less  opaque,  with  poUi 
nose  markings  as  follows:  First  segment,  except  an  oval  spot  on  the 
sides  ;  second  segment  with  a  slender  convex  spot  on  each  side  near  the 
middle,  the  inner  end  widened,  expanded  on  the  sides  in  a  slender  tri 
angle,  the  ground  color  of  which  is  reddish  yellow,  posterior  border  in 
the  middle  also  i)ollinose  ;  third  and  fourth  segments  similar,  the  spots 
not  so  slender,  the  lateral  reddish  yellow  spots  smaller,  and  the  i)oste- 
rior  pollinose  margin  broadly  dilated  in  the  middle,  so  that  in  the 
fourth  segment  it  is  more  than  a  third  of  the  width  of  the  segment: 
tifth  segment  wholly  pollinose,  except  narrowly  at  the  base.  Legs  red 
dish-yellow ;  a  spot  above  on  the  front  and  middle  femora,  the  tip  of 
front  tibiiB,  an<'  the  distal  joints  of  their  tarsi,  a  large  oval  spot  on  the 
upijer])art  of  the  hind  femora,  and  the  extreme  tip  black;  a  8ub-l)asal 
and  a  i)reapical  ring  on  the  hind  tibia,  and  the  hind  tarsi  brown. 
Wings  nearly  hj'aliue. 

Although  1  have  but  two  specimens  (  ^  ,  9  ),  from  Connecticut,  yet  from 
comparison  with  European  specimens  and  also  with  the  full  description 
of  H.  liueatus  given  by  Loew  (Stett.  Ent.  Zeit,,  vii),  I  am  satisfied  that 
this  is  not  the  same.  The  male  ditters  in  the  much  larger  extent  of  yel 
low  on  the  abdomen,  and  the  thoracic  stripes  being  more  distinct ;  in 
the  female  by  the  greater  extent  of  pollen  on  the  abdomen,  and  espe 
cially  by  the  thoracio-  stripes,  which  are  broad  and  distinct,  a  third  of  the 
width  of  the  intervening  black  stripe  ;  they  are  not  diffuse  on  the  pos 
terior  part,  but  are  well  defined  quite  to  the  scutellum  ;  the  interveninj.' 
black  stripe  is  narrowed  iii  a  lanceolate  form  at  the  tip,  merely  touch 
ing  the  scutellum  in  an  acute  ])oint.  In  II.  Uneatus,  on  the  posterior 
third,  the  stripes  are  widened  in  a  more  grayish  (^olor  so  as  to  leave 
only  a  slender  line  between  them,  apparent  in  well-preserved  examples 
The  lower  part  of  the  face  is  less  brow  uish  in  H.  conoatomtis,  and  the 
legs  have  a  less  extent  of  black.  I  am  not  sure  that  all  these  differences, 
especially  the  latter  ones,  are  constant. 

Should  the  genus  Eurhimyia  Bigot  be  deemed  admissible  (I  do  not 
think  that  it  is)  this  species  would  belong  in  it. 

A  single  specimen  without  a  head,  of  this  species  is  in  the  Loew  type 
collectioD,  bearing  the  label  "  Spec,  indescr." 


i!';/.. 


SYNOPSIS    OF   NORTH    AMERICAN    SYRPHIDiE. 


195 


HelophiluB  hamatus. 

Helophilus hamatua  Loew,  Centnr.,  iv,  79. 

Habitat.-  Hudson's  Bay  Territory  (Lw.)  I 

2  .  Length,  8.5°'"'.  Face  strongly  produced,  subconic,  cheeks  black, 
no  median  stripe.  Antennae  subochruceous.  Front  blackish,  thinly 
clothed  with  ochraceous  pollen  near  the  antenna?,  short  black  pilose. 
Dorsum  of  the  thorax  with  four  rather  broad,  ochraceous  pollinose 
stripes,  the  intermediate  ones  cinerescent.  Scutellum  reddish.  Abdo- 
men with  nearly  parallel  sides ;  first  segment  whitish-cinereous ;  the 
three  following  segments  black,  oi)aque,  each  with  two  whitisli  lunulate 
spots,  the  posterior  margin  shining ;  last  segment  cinereous  pollinose. 
Legs  luteous-brownish  ;  femora  with  black  markiiig3,  hind  tibiae  with 
two  fuscous  rings,  the  front  and  hind  tarsi  wholly  and  the  tip  of  the 
middle  tarsi  fuscous-black.  Wings  cinereous  hyaline,  stigmatic  sj^ut 
snbfuscous. 

Translation  from  the  original,  compared  with  the  type  specimen  at 
Cambridge. 

Helophilus  divisus. 

Jlelophilus  divisus  Loew,  Centiir.,  iv,  78. 

Habitat. — District  of  Columbia  (Lw.)! 

9.  Length,  0"^'".  Face  less  projecting  than  in  R.  obsoletus,  integer, 
and  Iwtns,  the  antennal  arista  black,  the  abdominal  lunules  narrow,  the 
cinereous  wings  and  the  markings  of  the  legs  are  all  ditterent.  Pile  of  the 
front  black,  above  rather  long,  at  the  vertex  luteous.  Dorsum  of  the 
tliorax  with  very  short  luteous  pile,  that  of  the  scutellum  longer.  Four 
br()a<l  stripes  and  a  luirrow  median  stripe,  attenuated  at  each  end,  lute- 
ous pollinose.  Basal  margin  of  the  scutellum  black.  Luteous  fascia?  of 
the  abdomen  very  narrow,  bri;;idly  interrupted,  so  that  each  is  divided 
into  two  moderately  curved  lunules;  jmsterior  margins  ot  the  second, 
third,  and  iburth  segments  obsoletely  lutescent,  fasciate  with  subcin- 
ercous  pollen.  Pile  of  the  abdomen  nearly  wholly  black.  Legs  luteous ; 
the  hind  ones  more  obscure,  the  femora,  except  the  base  and  tip,  fuscous, 
at  the  base  with  a  small  black  spot ;  basal  half  of  the  four  front  femora 
black ;  tii»  of  front  tibiie  and  last  two  joints  of  the  i'our  front  tarsi 
blackish;  hind  tibiae  near  the  base  with  a  snbfuscous  ring,  and  the 
apical  third  black,  hind  tarsi  black.     Wings  cinereous. 

Translation  from  the  original,  compared  with  the  type  specimen  at 
Cambridge. 


• .'  i  IS; 


Helophilus  integer. 

Helophilus  integer  Loew,  Centnr.,  iv,  70. 

Habitat.— ^iiw  York  (Lw.)! 

9  .  Length,  9  to  10""".  Very  similar  to  H.  obsoletus,  but  the  pile  of 
the  whole  body  much  shor  3r,  and  the  four  dorsal  luteous  pollinose 
stripes  rather  broad  and  very  distinct.  Scutellum  at  the  base  black. 
Luteous  fasciae  of  the  abdomen  broad,  the  first  narrowly  interrupted,  the 


196 


Bin.LETIX    31,    TTNITFD    STATES    XATTOXAI.    MT'SEUM. 


ti). 


'i>. 


'■  I.,  i 


A. 


.::.!- 


Ini;'' 


romaiiidor  (Mitirc;  (mh'Ii  sefjineiit,  <'\'c(>i)t  tho  first,  with  a  median  subtri 
angular  spot  ocliracoous  poll'MOse  and  contiguous  with  the  hind  iiiiir- 
gin  ;  hind  margin  of  the  third  segment  narrow,  of  the  fourth  segment 
broad,  luteons.  Legs  luteous ;  front  femora  near  the  base  with  a  l)lack 
spot;  hind  femora  near  the  base  with  a  minute  blacjkish  spot,  above  in 
large  part  black  and  near  the  tip  on  each  side  with  a  fuscous  s))ot;  iiind 
tibiic  near  the  base  with  a  fuscous  ring,  at  the  tij)  blackish  fusci  us: 
hind  tarsi  wholly  blackish  fuscous. 

Translation  of  the  original,  compared  with  the  type  specimen  at  Cam 
bridge. 

Helophilus  obscurus. 

Helophilun  obneurii8  Loew,  Centnr.,  iv,  74. 

Habitat.— Colorado  (O.  S.)! 

9.  Length,  lO"""'.  Black  and  yellow  varied.  Face  somewhat  project 
ing,  with  the  cheeks  and  a  rather  broad  median  stripe  black.  I'irst 
two  joints  of  the  antenufe  brownish-black,  third  joint  red,  more  obscure 
on  the  ui)])er  portion.  Dorsum  of  thorax  with  four  yellow  strii)es,  tiic 
interme<iiate  ones  slender.  Scutellum  yellowish  testaceous.  Abdd- 
men  black,  opaque,  the  postprior  margins  of  the  segments  moderately 
shining;  with  four  yellow,  interrupted  cross-bands,  the  anterior  oiiesoi 
moderate  width,  the  posterior  ones  narrow.  Femora  black,  the  tip  ot 
the  front  and  middle  Dairs  and  a  snbapical  ring  on  the  hind  pair  lute- 
ous; front  tibial  and  tarsi  wanting;  middle  tibiit  and  metatarsi  lute 
ous,  remaining  joints  of  the  tarsi  black  ;  hind  tibia'  black,  base  lute 
ous,  and  a  median  ring  brown,  tarsi  wholly  bla<;k.  Wings  cinereiuis 
hyaline,  near  the  costa  very  dilutely  brownish,  stigma  subtuscous. 

Translation  fiom  the  original,  compared  with  the  type  specimen  at 
Cambridge.  A  second  specimen  has  the  front  and  middle  femora  black, 
except  the  tip,  and  their  tibire  and  tarsi  yellow,  except  that  the  trout 
tibia'  are  brownish  in  the  middle. 

Helophilus  obsoletus.  • 

lltlopltihiH  olixolchtii  L(H^\v,  Ceuhir.,  iv,  TiJ. 

Habitat. — Hudson's  Bay  Territory  (Lw.)! 

9.  Length.  0""",  Two  slender  stripes  of  the  dorsum  of  the  thorax 
luteous  pollinose,  obsolete.  Basal  margin  of  the  scutellum  black, 
Luteous  fasciiB  of  the  abdomen  of  moderate  width,  the  first  broadly,  the 
second  narrowly  interrupted,  the  third  entire;  each  segment,  except  the 
first,  with  a  posterior  luteons  margin,  and  a  triangular  spot  contiguou.>^ 
with  it  of  the  same  color.  Legs  luteous,thecolorof  the  hind  pair  darker: 
front  femora  near  the  base  with  two  minute  black  spots,  hind  femora 
on  the  posterior  side  with  a  large  black  spot;  hind  tibiaj  near  the  base 
with  a  brownish  ring,  and  at  the  tip  blackish  ;  hind  tarsi  wholly  black, 
Pile  of  the  whole  body  a  little  longer  than  in  the  female  of  H.  integer 
or  laetus. 

Translation  from  the  original,  compared  with  the  type  specimen  at 
Cambridge. 


,ll 


IV 


SYNOPSIS    OF   NORTH    AMERICAN    SYRPHID^. 


197 


Helophilus  porcus. 

Kumcrus  porcHu  Walker,  LiHt,  etc.,  iii,  551. 

Habitat. — Hiidsoii'.s  Bay  Territory  (Walker). 

"9.  Length  of  tlie  body  3-4  lines;  of  the  wings  [spread]  6-7  lines. 
yiger,  thoraee  einereo  quadrivittato,  abdomine  niaculis  nigris  nitentibus 
i-anisque  ornato,  antennis  piceis,  pedibus  nigris,  genubus  tarsisque  fer- 
riigineis,  alls  .snbcinereis. 

-Body  black,  clothed  with  black  hairs;  head  covered  with  wliite 
bloom,  and  clothed  with  white  hairs  beneath,  pale  yellow  in  front  and 
around  the  base  of  tiie  feelers;  mouth  black;  feelers  pitchy;  bristle 
black;  eyes  brassy  black ;  all  the  facets  small;  chest  adorned  with  four 
gray  strii)es;  breast  tinged  with  gray;  abdomen  ellii)tical,  deep  velvet- 
like  black,  longer  and  a  little  broader  than  the  chest;  each  segment 
adorned  with  a  triangular,  black,  shining  spot  in  the  middle,  and  with 
a  hoary  spot  on  each  side;  hind  borders  shining;  legs  black;  knees  and 
feet  ferruginous,  the  latter  pitchy  towards  the  tips;  foot-cushions  and 
claws  tawney;  tips  of  the  claws  black;  hind  thighs  thick,  unarmed; 
hind  shanks  curved;  wings  pale  gray;  wing-ribs  and  veins  black;  veins 
pitchy  towards  the  base;  poisers  yellow." — Walker,  1.  c. 

••Is  a  very  i)eculiar  si)ecies;  it  is  represented  in  the  British  Museum 
by  two  (<?  and  2)  well-preserved  specimens.  I  have  never  seen  it  else- 
where.'"— Osten  Sacken,  Cat.  Dipt.,  250,  note  235. 

Helophilus  flavifacies. 

Helophilus  flavifacies  Bij!;ot,  Ann.  Soc.  Eut.  Fr.,  1883,  344. 

Habitat. — Maryland  (Bigot). 

cf.  Long.  9°'"'.  Antennis  testaceis;  facie  pallide  flava,  froute  superne 
iiisca;  thorace  nigro,  vittis  quatuor  flavis;  scutello  fulvo;  abdomine 
iiigro,  utrinque  tribus  maculis  trigonis,  marginibus  segmentorum  3  et 
4,  5"  toto,  Havo  pictis;  calyptriset  halt  ribus  testaceis;  pedibus  pallide 
tulvis,  femoribus  posticorum  apice,  tibiis  id.  basi  et  apice,  fusco  annulatis, 
rarsis  posticis  obscure  fulvis;  alis  pallidissime  flavis. 

Aiitennes  fauves;  face  d'un  jaune  blanchatre;  front  de  meme  couleur, 
la  iiioitie  superieure  brune;  thorax  d'un  noir  oi)aque  avec  quatre  bandes 
Iniigitudinales  Jaunes,  tlancs  converts  d'un  duvet  jaunatre;  6cusson 
faiive,  legerement  teint  de  noiratre  i\  la  base  et  sur  les  cotes;  abdomen 
d'aii  noir  opa(|ue,  les  segments  2'^',  .'}''  et  4*^  avec,  de  chaque  cotd,  une 
macule  trigonale,  la  moins  graiide  an  3",  fauves,  bords  posterieurs  dcs 
0'  et  4^^  segments  testaces,  5*^^  entierement  d'un  Jaune  testace;  piedsd'un 
tain  e  i)ale,  les  posterieurs  avec  trois  anneaux  bruns,  I'un,  sis  a  I'extremite 
(les  «!uivsses,  les  deux  autres,  sur  les  tibias,  tarses  posterieurs  d'un  fauve 
biunatre;  ailes  tres  legerement  jaunatres.     1  specim. — Bigot,  1.  c. 

Helophilus  Novae  Scotiae. 

Helophilus  Xovtv  .s'toMVr  Mactniait,  Dipt.  Exot.,  2"  Su])jil.,  (iO,  10. 

Habitat.  — 'Sova  Scotia  (Macq.). 

9.  Long.  12.5""".  Ater.  Thorace  vittis  flavis.  Abdomine  fasciis  albidis. 
Antennis  pciiibusquc  nigris;  tibiis  basi  rnfis. 


I 


.1 


rj;' 


I  i 


I  i' 


hi 


'I 


198 


BULLETIN    :U,    I'NITEI)    STATES    NATIONAL    MUSEUM. 


M 


Face  efc  front  jiiiines,  a  duvet  blaiicbatre  et  baiide  noire;  style  des 
antemies  brun.  Cofos  dii  thorax  iioirs;  ecusson  bnin.  Les  bandes  de 
rabdomcii  dtroites ;  cellOvS  de.s  i>reinier  et  deuxieriie  se},'ment8  elarjjies  ct 
fauves  siir  lejs  cotes;  ventre  noir,  a  incisions  blancbatres.  Janibes  in 
tcrniediaires  fiiuves,  a  extreniite  brunatre.  Ailes  aasez  claires ;  pre- 
miere nerviire  transversale  situde  au-dehl  de  la  rnoitie  do  la  cellule  dis- 
eoidale. 

ADDITIONAL  NORTH  AMERICAN  SPECIES. 

HelopbiluB  formalis  [femoralia']  Walker,  List,  etc.,  iii,  fiO;?. — Mexico. 

IJelopliiliiH  AndrocluH  Oaten  Sackeii,  Cat.  Dipt.,  SJuO,  note  230;  Walker,  LiHt,  etc.. 
iii,  612  (A'ris/a/is). — British  Possessions. 

Ilelophihia  fratcr  Osten  Sacken,  Cat.  Dipt.,  250,  note  2150 ;  Walker,  List,  etc.,  iii. 
6i:{  (^ErtHtnlis). — HiuLson's  Bay  Territory. 

IJehphibiH  chtilepiix  Osten  Sacken,  Cat.  Dipt.,  250,  note  2'.W;  Walker,  Dipt.  Saniid,, 
247  (EristaliH). — Canada. 

Baron  Osten  Sacken  from  an  examination  of  the  types  ol  these 
species,  described  as  Em^rtYAs,  ascertained  that  they  belong  to  the  group 
of  Jff.  borealis,  groenlamUcus,  and  gladaliH.  They  cannot  be  recognized 
from  the  descriptions. 

PTERALLASTES. 

Pivrallaxtes  Loew,  Centiir.,  iv,  80,  1803. 

Head  broader  than  the  thorax,  much  flattened.  Eyes  bare,  broadlj- 
contiguous  in  the  male.  Frontal  triangle  small,  antenna]  ])rominenco 
short,  obtuse.  Antenuse  inserted  rather  below  the  middle  of  the  head 
in  profile,  rather  small;  first  two  joints  .short,  third  joint  rounded: 
arista  basal,  bare.  Face  in  the  male  nearly  perpendicular,  not  descend 
ing  far  below  the  eyes,  in  profile  gently  concave  above  and  more  gently 
convex  below,  arched,  not  carinate;  in  the  female  concave;  obliquely 
truncate  below;  cheeks  narrow,  the  lower  border  forming  with  the  plaiu- 
of  the  occijiut  a  little  more  than  a  I'ight  angle.  Scutellum  wholly  yel- 
lowish opacpie  like  the  dorsum  of  the  thorax.  Abdomen  elongate  oval, 
nearly  twice  as  long  and  broader  than  the  thorax,  broadest  at  tij)  of 
second  segment,  thence  gently  narrowed  to  the  tip  of  the  fourth.  Legs 
wholly  unarmed,  rather  stout;  hind  femora  moderately  thickened,  elon- 
gate, below  with  short  lu'istly  hairs;  hind  tibia'  considerably  arcuate, 
tiattened.  Marg'ual  cell  of  wing  open,  third  vein  with  a  deep  sinuosity 
into  the  first  posterior  cell;  anterior  cross-vein  very  oblique,  near  outer 
third  of  discal  ce'l,  last  section  of  fourth  vein  strongly  sinuate,  terininat- 
ing  near  the  tip  of  third  vein  ;  sixth  vein  nearly  straight. 

Large,  rather  thickly  i)ilose,  moderately  elongate  species.  Thorax 
densely  yellowish  pollinose  ;  abdomen  black,  shining.  Tyjie  of  genus, 
P.  thoracicus  Loew,  North  America. 

Pterallastes  thoracicuB.     (Plate  VIII,  tij^s.  9, 9a.) 
Pterallaatcn  thoracicns  Loew,  Centiir. ,  iv,  i^O. 

Habitat. — Pennsylvania! 
S  .  Length,  9  to  12.5""".  Face  black,  rather  thickly  covered  with  gray- 


SYNOPSIS    OF   NORTH    AMERICAN   SYRPHID^, 


199 


ish  pollen,  the  checks  bare  and  shining.  Antennre  reddish-brown. 
Frontal  triangle  more  thickly  clothed  with  yellowish  dust.  Thorax  and 
scutelluin  very  thickly  clotlied  with  opaque,  ochraceous  pollen,  leaving 
only  a  faint,  slightly  brownish,  median  stripe ;  pile  abundant,  not  very 
loiijjf,  wholly  yellow.  Pleura  black,  lightly  dusted,  moderately  shining, 
except  a  brown  stripe  down  the  middle,  which  is  tiiickly  gray  j)ollinose 
and  gray  pilose.  Abdomen  brownish-black,  wholly  shining;  pile  yel- 
low, broadly  black  pilose  on  the  mi<ldle  of  the  fourth  segment  behind. 
Lcfi-s  black  ;  coxse  rather  thickly  gray  i)ollinose,  the  knees  narrowly  on 
rbe  Iront  legs,  knees  and  base  of  tibife  on  the  middle  and  hind  legs  and 
their  tarsi,  liglit  yellow,  the  extreme  tip  of  four  hind  tibiic  sometimes 
yellow,  and  the  front  tarsi  somewhat  reddish  below.  Wings  distinctly 
infiiscated,  especially  beyond  the  anterior  cross-vein  ;  faint  clouds  on 
all  the  cross-vieus. 

9  .  Face  concave ;  front  of  moderate  width,  thickly  luteous  pollinose 
a  large  black  spot  above  the  antenna'  black,  shining,  vertex  black. 
Loew,  1.  c. 

I  have  two  male  specimens  from  Mr.  E.  Keen,  of  Philadelphia.  Loew 
liescribes  the  abdomen  as  "  shining  black,  obsoletely  bluish." 


TEUCHOCNEMIS.* 

Tuechocnemifi  Osteii  Sackeii,  Bull.  Buff.  Soc.  Nat.  Soi..  iii,  .'iS,  1876;  Cat.  Dipt.,  note  i>37, 
p.  2.')0. 

Rather  large,  elongate,  moderately  pilose  species,  black  and  yellow. 
Head  short ;  face  not  tuberculate,  not  produced  ;  the  margin  of  the 
ebeeks  forming  not  much  more  than  a  right  angle  with  the  plane  of 
the  occiput.  Antennae  short,  third  joint  transverse ;  arista  bare.  Legs 
<tout,  hind  femora  thickened,  especially  in  the  male.  Hind  tibiae  arcu- 
ate and  i)rovided  with  a  stout,  internal,  median  spur  in  the  male.  Mar- 
ginal cell  of  wings  open,  third  vein  with  a  moderately  deep  curve  into 
the  first  posterior  cell. 

Tyi)e  of  genus,  T.  Uturatiis  Loew,  North  America. 

This  genus  cannot  be  separated  easily  from  Mallota,  and  may  have 
to  be  abandoned.  The  character  upon  which  Osten  Sacken  based  it, 
WHS  the  ))eculiar  spur  on  the  internal  part  of  the  hind  tibia} ;  but,  as 
will  be  seen,  this  character  occtirs,  apparently  as  only  a  dimorphism, 
in  MaUota  cimbiciformis,  and  hence  has  no  value  here  as  a  distinguish- 
lug  mark.  The  species  are  much  more  bare  than  in  our  species  of  Mai- 
lota,  and  the  general  habitus,  especially  of  T.  baeuntius,  is  very  different. 
The  last  species  reminds  one  forcibly  of  the  more  Milesia-likG  ibrms. 


TABLE  OF  SPECIES. 


Abdomen  wholly  black         

Abdomen  in  larij;e  part  yellow  or  liitfous 


lituratus 
Bacuntias 


.' 


. 


*  Tevxo?,  armor:  nvyjur),  tibia. 


h ! 


200       liui.LETiN  :m,  unitkd  states  national  museum. 


'•■<\ 


/. 


.,"il 


Teuchocnemis  lituratus.      (Plato  VIII,  flgR.  I'i,  12a.) 
rtcraUanten  liliiratnn  Lcxnv,  Ccntiir.,  iv,  81. 

Teiichonifniix  litiiraliis  Ontnu  Sackon,  Hull.  Buff.  Soc.  Nat.  Sci.,  58,  1876;  Cat. 
I)i|»f.,  li.'.d. 

Hiihitaf. — IViniisylviiiiia,  Connecticut,  Mi.S80iiri ! 

i  ,9  .  Leii;ith,l()  to  lli""".  Dliick,  moderately  shininfj.  Head  diliUcly 
liiteoim  or  yellow ;  occiput,  except  tlie  niarfjiti,  <;inereous,  opaque ;  checiis 
l)l;M'k,isliinin}jf.  Anteiiuie  scarcely  darker  than  tlie  face.  Dorisum  oftiin 
ra.\  with  ;;Tiiyisli  or  yellowish-<;ray  pollen  and  thin  obscure  yellowisii 
l>il«',  subopa«pie;  on  each  side  of  the  middle  a  slender  opaque  black  striiM-. 
abbreviated  both  in  front  and  behind;  .just  above  the  wing  a  reddisli 
elongate  spot,  aiul  i  le  humeri  also  sometimes  of  the  same  color.  8cii 
t«'lluin  luteous,  the  base  blackish.  Abdomen  Idack,  so.newhat  shiniii;;, 
with  short,  thin,  white  pile.  Legs  black;  front  femora  at  the  ends  and 
more  or  less  below,  base  of  their  tibiic,  middle  tibia)  for  the  larger  part, 
and  the  middle  tarsi,  except  the  tip,  hind  femora  at  base,  along  the  undi'i 
sides,  the  tibiii*  at  base  and  tip,  and  the  tarsi  except  the  tip,  ligiit 
yellow ;  in  the  female  the  hind  legs  may  be  wholly  reddish-yellow,  except 
the  tij)  of  tarsi.  Wings  brownish,  with  an  elongate  hyaline  spot  in  tlit- 
tirst  and  second  basal  cells ;  narrow  clouds  along  the  base  of  the  first  and 
fifth  veins. 
Two  specimens,  New  Haven,  Conn.,  and  Missouri  (Mr.  Theo  Pergandi-i. 

Teuchocnemis  Bacuntiua.     (Pliito  VII,  Hj;.  fi.) 

MUema  liacunfinn  Walker,  List,  etc.,  iii,  ;')<):$. 

Teuchocnemis  Jiacinitiiis  Ostou  Sackfiii,  Bull.  Buflf.   Soc.   Nat.  Sci.,  iii,  .')8;  Cat 
Dii»t.,  i:'i.'),  uotcH  '2:^7,  '238,  p.  2.')0. 

Habitat. — Georgia,  Texas! 

^  ,  9  .     Length,  lli '.    Face  light  yellow,  thiidy  light-yellow  polliucise 

Antenuje  reddish  yellow  ;  cheeks  and  occiput  reddish  yellow,  narrowly 
whitish  ])ollinose  along  the  orbits.  Front  of  female  like  the  face;  jhIo 
light  yellow.  Dorsum  of  thorax  black,  the  broad  lateral  margin  ex 
temling  a  little  inwards  at  each  humerus,  and  a  large  triangular  s])()t 
in  front  of  the.  scutellum,  the  scutellum  and  a  large  spot  on  the  meso- 
l)leuni'  yellowish  red  ;  ))ile  of  <lorsnm  moderately  abundant,  erect,  yel 
low.  Abdomen  brownish  black,  the  lateral  anglesof  the  first  segment, the 
second,  third,  and  fourth  segments  with  two  very  large  coalescentsitots, 
extending  from  the  ])()sterior  nearly  to  the  anterior  margin,  but  broadly 
conne(!ted  behind,  and  the  fifth,  segnuMit  wholly  reddish  yellow;  in 
some  specimens  the  picture  is  not  distinct,  and  the  yellow  more  or  less 
broken  up  in  brown,  in  ]>art  i>erhaps  due  to  the  ettect  of  <lryiug.  Legs 
reddish  yellow,  the  base  of  all  the  tibia  pure  yellow.  Hind  femora  in 
the  male  very  much  swollen ;  in  the  same  sex  the  coxje  are  provided 
with  an  obtuse  tubercle,  and  the  tibise  on  the  front  side,  near  the  mid- 
dle, have  a  strong  i)rqjecting  tubercle;  in  the  female  the  femora  are 
only  a  little  thickened,  and  the  tibiie  are  not  i)rovidecl  with  the  spine. 
Wings  strongly  tinged  with  brownish,  especially  in  front,  a  streak  along 
the  first  basal  cell  nearly  hyaline ;  third  longitudinal  vein  with  a  rather 
deej)  curvature  into  the  first  posterior  cell. 


<u 


SYNOPSLS    or    NORTH    AMEUICAX    SYKl'HID/E. 


201 


Two  specimeihs  (  S  aud  $  )  in  Baron  Osten  Sackeii's  collection  at  the 
Museuni  of  Comparative  Zoology,  bearing  the  label  "Dallas,  Tex., 
Boll.,"  and  a  specimen  in  Professor  Riley's  collection. 


MALLOTA.* 

Mallota  Moigcn,  Syst.  Beschr.,  iii,  :J77,  1*2'J. 

Head  somewhat  flattened,  broader  than  ttie  thorax.  Face  concave 
below  antenme  aud  with  a  large  obtuse  tubercle;  antennae  short,  third 
joint  broader  than  long,  arista  bare.  Eyes  in  the  male  contiguous  or 
separated  only  by  a  sutural  space;  i)ilose  or  naked.  Scutellum  large. 
Abdomen  short,  much  convex  above.  Leg.s  strong,  hind  femora  ex- 
traordinarily thickened  and  bent,  the  hind  tibias  sometimes  with  a  stout 
spur  in  the  middle  in  front  in  the  male.  Wings  with  the  marginal  cell 
open;  third  longitudinal  vein  deeply  bent  into  the  first  posterior  cell; 
the  fourth  vein  teru>inates  near  the  tip  of  the  third;  anterior  cross-vein 
oblique,  situated  near  the  middle  of  discal  cell.  Large,  black,  shining 
species,  densely  i)ilose. 

TABLE  OF  SPECIES. 

1.— Eyi'8  pilose ;  more  or  less  of  the  base  of  the  abdomen  with  yellow  pile, 

posticata 

Eyes  bare ;  abdomen  wholly  black  pilose 2 

2.— Eyes  of  male  separated  by  a  narrow  suture  in  front  of  the  ocelli;  wings  with  a 

distinct  brown  spot Sackeni 

Eyes  of  male  quite  contiguous;  wings  indistinctly,  rr  not  at  all  spotted.  Hind 
tibiae  of  the  male  with  a  stout  spur  in  the  niif  .die  (form  Baittias),  or  wholly 
without  snch  spur cimbiciformiB 

Mallota  posticata.    (Plate  YIII,  fig.  13.) 

Eriatalis  poaticatus  Fabricius,  Syst.  Antl.,237, 21  ;  Wiedemann,  Au.sh.  Zw.  Ins., 

ii,  194,  fi2  (translation  from  Fabricius). 
Milesia harda Fay,  .1.  Acad.  Phil.,  vi,  163 ;  Compl.  Wr.,  ii, 3.')?  (male,  not  fi'inale). 
Erisfalis  coactita  Wiedemann,  Auss.  Zw.  Ins.,  ii,  165. 
Imaiiama  posticata  Macquart,  Dipt.  Exot.,  ii, 2, 68  (male,  not  female). 
Merodon  Balanua  Walker,  List,  etc.,  i'i,  600. 
Merodon  6arrfM«  Packard,  Guide  Study  Ins.,  399,  fig.  319;  Amer.  Nat.,  ii,  Jan.,  1869, 

593;  pi.  12,  figs.  10,10a;  Glover,  MS.  notes  Jour.  Dipt.,  1874, p.  32;  jtl.,viii, 

fig.  30. 
Jffl /b to  tarda  Osten  Sacken,  Cat.  Dipt,  135, 249. 
Mallota  posticata  Williston,  Berl.  Ent.  Zeit.,  xxvii,  170 :  Lintner,  First  An.  Rep., 

211,  fig.  64. 

Habitat. — New  England,  Canada,  New  York,  Kansas!,  Indiana  (Say). 

(J ,  9  .  Length,  11  to  15""".  Eyes  pilose,  contiguous  in  the  male  for  a 
little  longer  distance  than  in  M.  eimbiciformis.  Face  black,  with  light 
yellowish- white  dust  and  pile,  median  stripe  and  cheeks  shining ;  frontal 
triangle  clothed  with  the  same  dust  as  the  face,  except  just  below  the 
base  of  the  antenuje,  where  it  is  shining,  pile  yellowish  or  blackish ; 
vertex  black,  with  black  pile.  Front  in  female  clothed  with  black  pile, 
more  or  less  intermixed  with  yellow ;  pile  of  occiput  yellow,  blackish 

*Ma?i},urbc,  woolly. 


•i 


Ivl 


i-iK 


i  ■ 


202 


BULLETIN  31,  UNI  I KD  STATES  NATIONAL  MUSEUM. 


IK 


lifi 


'I!,'".' 


townrds  the  toj).  Antennii'  brown  or  blackish,  thinl  Joint  nearly  orbic- 
ular. Thorax  black,  opa(|iHf  on  tlic  disk,  in  front  and  on  the  Hi(ltt« 
brownish  when  denuded  ;  dorsum  thi<'kl.v  covered  with  bri^iht  yellow 
furry  pile,  less  abundant  on  tin*  middle,  where  it  is  sometimes  intermixed 
with  black,  ov  not  seldom  (|nite  black.  Sciitellum  yellow,  bhuik  at  base ; 
l)ile  yellow.  Abdomen  black,  with  abundant  black  and  yellow  pile  ;  tin- 
yellow  pile  varies  nui(;h,  tisually  it  is  conlined  to  the  lirst  and  basal  j»art 
of  the  second  sefjment,  at  other  times  coinprisinji'  nearly  the  whole  of 
the  third  sej,Mnent.  When  denuded  of  pile  the  al«lomcn  often  shows 
considerable  red  on  the  second  and  third  sey;!nenls.  Le^js  black  ;  tips 
of  femora,  the  tarsi,  and  sonuitimes  a  lar}j:e  portion  of  the  tibia',  red: 
pile  chietly  bhuik,  but  with  more  or  less  yellow,  especially  on  the  front 
and  middle  pairs;  hind  femora  much  swollen,  arcimte  in  the  male,  hind 
tibi{e  compressed,  especially  in  the  male.  Win{,'s  nearly  hyaline,  usu- 
ally with  a  small,  faintly  brownish  sjxjt  opposite  the  tip  of  the  auxiliary 
vein. 

This  fly  shows  a  striking-  resemblance  to  EriHlaHn  Jiavipen^  with  whicb. 
iiuleed,  it  was  <;oufounded  by  Say  in  his  descri]>tion  of  Milesia  harda. 
the  female  of  which  belonjjed  to  the  former,  the  male  to  the  present 
si)ecies.  They  are  not  oidy  strikinjjfly  similar  in  ai)pearance,  but  they 
vary  in  the  same  way,  namely,  in  the  amount  of  yellow  and  black  ]nh 
on  the  thorax  an<l  abdomen.  Thus,  as  I  have  shown  elsewhere,  Eris- 
talu  melanoHlomux  is  a  simple  variety  of  E.  Jlavipes,  corresponding  quite 
to  M.  pnsticata,  variety  harda  of  Say.  I  have  found  the  species  rather 
common  in  ('onnecticut.  The  description  is  based  chietiy  upon  tifteeii 
."<l>ecimen8  collected  in  June,  from  about  blossoms  of  the  blackberry 
and  doj^wood  (dornus  panicniata),  in  com])any  with  M.  vimbiciformix. 
Other  s])ecimens  1  have  compared  from  ('anada  (William  Brodie),  New 
Vork  (I'rofessor  Lintner),  Kansas  (Professor  Popenoe),  and  Pennsyl- 
vania (E.  Keen). 

For  discussion  of  the  synonymy  of  this  species  see  the  followiug: 

Mallota  cimbiciformis.     ( IMnte  VIII,  tij;.  11,  iiiul  I'lato  IX,  ti>,'.  H.) 

Syrphim  dmbici/oniiix  Fallen,  Kyrpli.,  27,  18. 

lirixlalix  rimhiri/oviiiis  Mci^fcii,  Svst.  licsclir.,   iii,  I!K'), ;{. 

fmutisniti.  iioxlicdta,  Jlac(iiiint,  Dipt.  Kxot.,  ii,  'i,.08  (funialc  only);  tab.  xii,  fig. 

•■i\  Locw,  X»Mif  Bi'ifr..  iv.  17  ;  id..  Anier.  Jour.  Sci.,  "2nd  .series,  xxxvii,  317. 
Mallold  iiDxticata  Scliincr,  Diiit.  Austr.  in  Vrrh.  Zool.  Hot.  fie.sells.,  vii,  492;  id,. 

Fauna  Aiistr..  i,  'M.'>:  Ostcn  Sackcn,  (.'at.  Dipt. 
MuUota   rimbici/ormix   .ScIiintM',   Nov.   Hxpcd..  :!tM) ;  AVllli.ston,   Bcrl.   Fnl.  Zeit- 

Hi'hriCt,  xxvii,  171. 
Merodon  flautiax  Walker.  List,  etc.,  iii,  (iOO. 
Mallota  Daiitiax  Osteu  Sacken,  Cat.  Dipt,  and  note  2;?t),  j).  '250:  KuTHeh,  Berlin 

Knt.  Zeit.,  xxvii,  17*2. 
Mallota  atrox  (Berlin  Mnsenni)  Kar.sch,  1.  c. 
Mallota  (lentipcd  (Williston)  Liutner,  First  Au.  Rep,  of  the  Entomologist, '211. 

Hahitat. — Georgia,  Indiana,  Pennsylvania,  New  York,  Connecticut. 
New  Hampshire,  Canada! 


'  . 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


203 


c' .  9  .  Length,  13  to  10'""'.  HyoH  bare,  roiitiKnoiiH  for  a  short  dis- 
tiiiur  below  the  ocelli  in  the  male.  Front  in  female  narrowed  above, 
hliicU,  sliinintr,  except  on  the  sides  below  the  ocelli,  where  it  in  narrowly 
liiit  thickly  dusted,  like  the  face;  pile  black,  intermixetl  with  yellowish 
.icross  the  ndddle  and  at  the  vertex.  In  the  male  the  frontal  triangle 
is  riiickly  dusted  like  the  face,  except  just  above  the  base  of  the  an- 
tciiiiie;  the  i)ile  is  usually  black,  sometimes  almost  wholly  yellowish. 
Fare  deeply  concave  below  the  antennae  to  tip  of  tubercle,  i)rodiU!e(l 
iiiodenitely  downward,  thickly  covered  on  the  sides  with  grayish  or 
^vliitish  pollen,  leaving  a  broad  median  stripe  and  cheeks  shining  black. 
Aiitenme  brownish-black,  the  third  joint  somewhat  re(hlish  ;  arista 
reddish.  Posterior  orbits  thi<;kly  <lusted  with  whitish.  Dorsum  of 
thorax  in  its  ground  coh)r  mo<lerately  shining  on  the  disk,  pollinose  in 
trout,  the  color  concealed  beneath  thick,  furry,  light-yellow  pile.  Scu- 
telluin  light  yellow,  with  similar  colored  pile;  j)ileof  pleurie  thicker  and 
■A  little  lighter  coloied.  Abdomen  short,  convex,  obtusely  conical, deep 
shining  black,  with  short,  erect,  black  pile,  longer  towards  the  tip  ;  the 
tirst  segment  is  grayish  pollinose,  and  the  i)ile  slightly  intermixed  with 
wiiitisli ;  venter  black,  the  basal  segments  more  or  less  pale.  Legs 
(It'cp  black,  with  black  i)ile,  the  tarsi  dark  reddish,  slightly  or  not  all 
so,  however,  on  the  hind  pair;  posterior  femora  very  much  thickened; 
in  the  male  extraordinarily  so,  and  arcuated;  posterior  tibia;  com- 
pressed, especially  in  the  male.  Wings  hyaline,  sometimes  with  a  dis- 
tinct brown  spot  near  the  furcation  of  the  second  and  third  veins  and 
the  tip  of  the  auxiliary  vein. 

I'orm  cimbiciformis.  Hind  tibiae  in  male  moderately  compressed, 
wholly  without  a  sjmr  in  the  middle ;  usually  smaller  specimens. 

Form  Bantias.  Hind  tibiai  in  the  male  extraordinarily  compressed, 
iiud  with  a  stout  angular  projection  iu  the  middle,  which,  when  the 
tibia  is  tlexed,  lies  on  the  outer  side  of  the  femur  ;  usually  larger  s])eci- 
mens. 

A  very  singular  si)eeies,  which  is  apparently  dimorphic  in  the  male. 
Of  the  form  without  the  sj)ur  I  have  two  males  taken  in  company  with 
two  other  niales  of  the  sjmrred  form,  June  20,  near  New  Haven,  about 
the  blossoms  of  Cornus  paniculata.  They  are  smaller  than  the  smallest 
of  all  my  spurred  specimens,  but  otherwise  I  can  see  no  dilierences 
what(!ver.  With  these  four  males  just  mentioned  I  captured  four  fe- 
males, all  of  which  were  larger  than  the  unspurred  males.  A  single 
teinale  from  Indiana,  however,  agrees  very  well  in  size  with  these  un- 
spurred males,  but  shows  no  other  diflPerences  from  the  other  females. 
I  have  also  six  males  and  an  equal  number  of  females,  all  of  them  large 
and  all  of  the  males  with  spurs,  collected  near  the  base  of  Mount  Wash- 
iiifiton,  July  25-28.  Another  spurred  male  1  have  seen  from  Pennsyl- 
vania (E.  Keen)  .and  a  female  from  Canada  (William  Brodie). 

There  are  some  minor  clitferences  in  tliese  specimens  which  it  will  be 
worth  while  to  notice.     The  pile  of  the  legs  is  usually  wholly  black,  at 


'  I' 


20  1 


IUM,i;'IIN    :!l,    IMIKD    s'lATi 


ATIoNAI-    ML'SKl'M. 


"i.i 


oflu'i'  timt's  iniicli  iiit«'iinix«'d  with  ^I'llow  ;  tin*  .sunk'  miiyl«'  siiid  ot  flic 
l»liick  |>il)'  of  the  front.  Tin'  black  pih'  of  the  postal  ior  pint  of  the  ali 
iloiiicti  is  soiiiotiriu>s  u  litth^  iiitciinixt'ii  with  reddish,  hut  in  none  do  | 
tlnd  any  but  black  ])iU^  on  th<^  second  segment,  a  fact  which  will  readily 
cnabh^  the  species  to  be  distinguished  from  M.  poHticata. 

In  the  synonymy  of  the  species  there  has  been  nnurh  confusion.  The 
tif'st  one  who  |>ublished  anything  in  re(;ard  to  American  s|>ecime]is  \va> 
Macipnirt.  lie,  unfortunately,  from  their  close  resemblance,  suppost-ij 
the  sinjrie  fennile  specimen  which  he  examined  to  belouf,'  with  the  niali' 
type  of  Fabricius'  hWiHtaViH  p<>nticatus,  at  that  time  in  Bosc's  museiiiii. 
at  Paris,  and  which  he  used  in  describinj,'  the  species.  In  the  i)n'si-iit 
species  the  eyes  are  bare,  wliile  in  Kabritrius'  ty|>es  the  eyes  are  pilose, 
a(;cordin}>'  to  Mac<]uart;  this,  to};ether  with  the  fact  that  the  base  oi 
the  alxlomen  is  never  yellow  pilose  (the  sparse  lifjlit  hairs  on  the  lirst 
segment  are  very  inconsi>icuous),  renders  it  certain  that  the  im'sent 
cannot  be  EriHtalix  pottticatUH  Fabr.,  as  has  been  supposed  by  later  au- 
thors. On  tlu'  other  hand,  there  (!an  hardly  be  any  doid)tthat  the  spe 
cies  described  by  Say  as  Mile/tia  harda  (male)  is  the  true  E.  ponticalm 
of  Fabricius. 

The  description  of  cimhici/ormiH  as  jjfiven  by  Fallen  does  not  quite 
agree  Avith  this,  and  comparison  is  needed  with  European  specimen^ 
before  the  identity  can  be  actually  settle«l  or  denied.  Loew  believet! 
the  sj)ecie8  to  be  the  same. 

The  flight  of  this  fly  is  a  little  peculiar,  and  will  enable  one  to  readily 
distinguish  it  from  its  very  near  ally,  M.  posticata.  It  flies  with  a  loud 
buzz,  going  here  and  there,  in  and  about  the  iiatcbes  of  flowers. 

Mallota  Sackeni.    (Piute  VIII,  iig.  14.) 

Mallota  posticata  Osten  Saclteu,  WeHt.  Dipt.,  338. 
Mallota  Sackeni  Williston,  Proc.  Am.  Phil.  Soc,  xx,  324. 

Habitat. — Washington,  Texas  I 

S  .  Length,  14""".  Closely  allied  to  M.  cimhici/ormis,  but  differs  iu 
the  presence  of  a  dark  brown  sjmt  on  the  wings,  and  iu  the  eyes  of  the 
males  being  distinctly  separated. 

Face  black,  covered  with  thick  light  yeUow  pollen  and  pile,  a  broad 
meilian  stripe  and  the  cheeks  shining.    Antennte  black,  the  third  Joint 
more  brownish,  the  angles  apparently  less  rounded  than  in  the  i)rece(i 
ing  species.     Frontal  triangle  covered  with  the  same  dust  and  pile  na 
on  the  face,  except  in  the  middle  where  it  is  shining.     Eyes  bare,  con 
vergent  below  the  ocellar  triangle,  but  separated  by  a  very  distinct  ii. 
terval.    Thorax  black,  thickly  covered  on  the  dorsum,  scutelhun,  and 
})leurie  with  erect,  furry,  light  yellow  i>ile  ;  scutellum  light  yellow.    Ab- 
domen black,  shining,  clothed  with  black  pile;  ou  the  first  segment 
slightly  intermixed  with  light  colored.      Legs  black ;  extreme  tip  of 
femora,  base  of  tibiae,  and  the  tarsi,  obscure  yellowish.    Hind  femora 
much  swollen  and  bent,  hind  tibiae  compressed.    Wings  hyaliue  with  a 


ir;' 


lj:U\ 


•SYNOl'SIM    ol'    NOI.'TII     AMr.KICAN    SVinMIIK.E. 


•205 


iar^;»' brown  .spot,  (ixtciHliii;;  iViiiii  the  tdifation  of  the  Sfttond  iiiiil  fliinl 
veins  t(»  tlic  ;iiit«'rinr  cross  vein  ;iii(l  iVoiii  tin- (-(Mtii  to  tlir  l)iis(' ttf  tlm 
liiitl  posterior  cell.     Miirjjiiial  <m'1I  rlo.M-d  in  tlu*  I'osta. 

One  spcciiiHMi. 

It  is  not  itM|>o.ssihli' tliiit  nior<- material  will  r(>n<lcr  tlioHi;  charactora 
III  It'ss  vainc  in  sr|>aratin;4  this  species  IVom  the  rorc;join;;. 

I'onr  nnilcs  Croin  Waco,  Texas,  in  the  National  Miisenni,  since  ex- 
iiiiined,  all  a;;r<'e  in  the  <li<;hoptic  <hai;u!ter,  and  the  lirownish  spot  ou 
rlie  win^fs.  The  niar;r|nal  cell  is  open.  Tiie  body  is  nioreelonpite,  and 
the  pile  of  the  iliorax  more  fnlvous  than  in  M.  rimbici/nruiiK. 

Mallota  bipaitita. 

Miroiloii  hiirirlihiH  Wulkcr,  liiHt,  etc,  iii,  !)'M. 
Uiilhihi  liiiKirlita  ONfrii  Sackcii,  Cat.  Dipt.,  ll(.">. 

ll(,l,if(,t.—V,i'nv<r\ii{\\ii\k.). 

'*<^  .  yi(i<)\  (tntcinm  pic'ek  setiH  fitlius,  pcdlhus  nigrin  tihiin  batti  pedi- 
lnisiiKcsuhfiis/crnu/inciH,  aliin  HuhcinerciH  J'usvo  ml  costani  vnimaculads. 

•'  Uod.,-  black,  head  .sliininfr,  <dothed  witli  tawny  and  black  hairs, 
prominent  abont  tiie  month,  which  is  black  ;  feelers  piteliy  ;  bristle 
tawny;  eyes  bhu'k ;  all  tlie  facets  very  small;  chest  thickly  clothed 
with  yellowish-white  hair;  abdomen  linear,  shinin<;',  a  little  lon^^er  and 
itroader  than  the  chest,  thinly  (dotlied  with  sh(»i't  tawny  hairs,  j'overed 
iKore  tliickh  toward  the  tip  with  black  hairs;  lej^s  black,  clotlie<l  with 
»liort  bhiclv  hairs;  shanks  ferrnj;:inous  towards  tint  base ;  feet  ferru- 
;;inons  beneath;  daws  and  foot-eushions  tawny:  tips  of  feet  black; 
wiiijxs  slifjhtly  gray  with  a  small  brown  s|)ot  under  the  miildle  of  the 
tore  l)order ;  \vint;-ribsand  veins  pitchy;  veins  tawny  toward  the  base 
and  aloii};  the  fore-borders;  poisers  tawny.  Iien;;th  of  the  body,  4^ 
lines;  of  the  winjis,  10  lines."    Walker,  I.  c. 

•'  Merodon  IkiutiuH  Walker  is  represented  in  the  British  Mu-seum  by  a 
Auiilr.  male  specimen  ;  Af.  bipartitus  by  four  specinuMis,  two  of  which 
seem  to  be  females  of  M.  Bautias;  the  two  others  may  be  a  different 
species."    Osten  Sacken,  1.  c. 


TRIODONTA.* 

Pohjdonta  Macquart  (iion  Fischer),  Dipt.,  Kxot.  4"  Stippl.,  144,  1850. 
Triodonta  Williston,  Bull.  Brookl.  Entom.  Soc,  vii,  i;i(l,  IrtS.'). 

Differs  from  Mallota  in  the  eyes  of  the  male  being  broa«lly  separated, 
hare;  in  the  male  hind  coxae,  hind  femora,  and  tip  of  hind  tibiaj  being 
provided  with  spurs  or  protuberances ;  in  the  abdomen  of  the  nuile  be- 
ing narrowed  posteriorly,  and  in  the  general  i)ilosity  being  nuudi  less. 
In  our  single  species  the  color  of  the  abdomen  in  the  two  sexes  is  strik- 
ingly different. 


•  Tpiodovi,  with  three  teeth. 


206 


bili-!:tin  :ji,  initko  states  national  museum. 


'  " 


Trlodonta  curvipes.     (IMatf  IX,  lif^s.  1,  1«,  \b,  Iv,  Irf.) 

Mcrodon  ciiviipvn  Wit'tlfinaiin,  Aush.  Z\v.  Ins.,  ii,  141),  It. 
HelopliiluH  alhircpn  Macciiiart,  ]Ji|ir.  Kxot.  ler  Siipi)!.,  132,  0  :  \t\.  fig.  7. 
rohjdontu  hicolor  Miuiiuarr,  Dipt.  Exot.  4<)  Siippl.,  144,  1  ;  jtl.  xiii,  fig  6. 
Voljidotila  curvipi'H  Ostt'ii  SacUcii,  Wt'nt.  IJipt.,  'XM\  WilliHtoii,  Proc.  Am.  Phil. 
Soc,  XX,  '.ViA. 

Jliibitat. — New  Eiifjliiiid!,  Colorado,  California  (().  S.). 

S  ,9  .  r»Mi<>tli,  10  to  1.")""".  Face  black,  sliiiiiiij,'oM  the  tubercle  and  the 
cheeks;  elsewhere  thickly  covered  with  yellowish  pollen  and  pile.  An 
tenna'  black  ;  aiista  yellowish  at  the  base  and  end.  Front  in  niiileblaol; 
on  the  u|>per  p.wt  and  above  the  base  of  the  antenna';  elsewhere covond 
with  yellowish  dust.  In  the  feinah'  the  front  is  broad,  shining  in  tlic 
middle  below,  black isii  above,  pile  near  the  ocelli  Idackish  ;  on  the  oc 
ciput  white.  Thorax  black,  covered  thickly  with  a  brownish  dust,  leav 
inj;'  faint  indications  of  a  slender  median  and  lateral  stripes,  and  with 
short,  rather  abundiint.  obscure,  yellow  jjile.  IMenra' dusted  with  wliitc; 
scutelluni  sub-translucent  yellow.  Abdomen  with  short  pile;  in  the 
male  as  follows:  First  sej;inent  black  ;  .second  segment  black  in  front. 
exce])t  at  tlw^  sides,  dilated  in  the  nii<ldle  in  a  broad  sub-triangular  spot, 
reaching  two  thirds  of  the  length  of  the  segment;  remainder  of  tlic 
abdomen  yellowish  red;  in  thefemaleblack,  partlyshining;  tirst segiiieiit 
and  second,  except  jmsterior  ])art,  thickly  dusted  with  grayish;  third 
and  fourth  segments  on  the  front  part  witli  a  broad  interrupted  band 
of  the  same  dust;  on  the  fourth  sometimes  only  two  rounded  spots, 
Legs  black  ;  tip  of  femora  and  base  of  tibisB  yellowish  red.  Wings 
nearly  liyaline. 

Numerous  specimens. 


TRCPIDIA. 


Tropidia  Meigen,  Syst.  Beschr.,  iii,  :546,  1822. 

Medium  sized,  nearly  bare  species ;  black,  with  yellow  markings  on 
the  abdomen.  Head  hemispherical,  somewhat  broader  than  the  thorax, 
Antennai  short,  third  joint  rather  hirge,  not  much  longer  than  broad, 
the  anterior  angles  only  a  little  rounded  ;  arista  bare.  Face  with  u 
median  keel-like  ridge;  not  produced,  obliquely  truncate;  cheeks  narrow 
\)elow  the  eyes.  Eyes  bare,  contiguous  in  the  male.  Thorax  short  and 
rather  broad.  Scutellum  large,  its  border  thin;  more  or  less  yellow. 
Abdomen  narrow,  somewhat  elongate,  of  nearly  e<puil  width,  depressed. 
Wings  fcdded  together  in  rest;  marginal  cell  open,  third  vein  witli  a 
mo<lerate  curvature,  sometimes  deeply  bent  into  the  tirst  ])osterior  coll. 
anterior  cross-vein  beyond  the  middle  of  discal  cell,  oblique,  l-eg.'^ 
strong;  hind  femora  extraordinarily  thickened,  below  near  the  outer 
end  with  an  angular  projection ;  hind  tibiai  bent. 


*  TpoTTiiia,  a  keel. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


207 


TABLE  OF  Sl'hCIES. 

a.— Femora  black,  at  tho  tip  testacooim;  tholiiiid  ft'iuora  bolow,  nt.-ar  lliobase,  with  a 
strong  inaunnifnrm  prucesH  (  ^) mamillata 

b.— Front  and  niiddlo  tVniora  yellow  on  distal  tMid  ;  hind  fiMnora  without  snoh  iirocfs,-, 
near  tho  base quadrata 

c. — AntiMiniu  larjjo,  reaching;'  nearly  to  tin-  oral  margin;  hind  coxm'  of  niiilf  with  a 
larg<'  obtuHo  spnr calcarata 

Tropidia  quadrata.     (I'latc  IX,  tigs.  '2u,  \ib.) 

Xjilota  <iiiatlrn((i  Say,  AintT.  Ent.,  i  ;  tab.  viii ;  Coiui)l.  \Vr.,  i,  14  ;  Wii-deniann, 

Anss.  Z\v.  lns.,ii,  UU,  (i  (tr.'inslation  from  Say;. 
Tropidia  ijiKulrald  Mai'ipiart.  Dii)t.  I'^xot.,  ii,  '-J,  72. 
.''  Tropidia  olhiKtijlum  Mac(inart,  l)i|)t.  Exot.  'JcSuppl.,  tlO,  1  :  tal).  "J,  fig.  ID. 

Eahitat. — Now  10ii{;laiul,  Caiiiulit,  Washinfjtoii  Territory ! 
^  ,  9  .  li(Mi{i;tli,  !»tolL*""".  Frout  ill  female  narrow  tibove,  l)lac5li,sliiiiiiifi: 
below  iuul  at  tlie  vertex,  on  the  sides  thickly  yellowi.sh  fjraydusted;  ])ile 
very  short  and  sparse,  yellowish.  Vertii^al  triangle  small,  black,  with 
black  pile:  frontal  trian<,'le  small, colore<l  like  the  fa(!e.  Face  },'ently  con- 
vex in  j)rotile  in  the  male,  a  little  concave  near  the  middle  in  llie  female  ; 
in  color  reddish  or  brownish  yellow,  densely  covered  with  yellowish 
gray  pollen,  leavinjr  a  slender  median  stilpe  shining  black,  a  stripe 
or  si)ot  on  the  cheeks  also  black.  Antennje  reddish  yellow,  the  third 
joint  nearly  stpiare.  Dorsum  of  thorax  shining,  greenish  blatrk,  with 
two  rather  distinct  median  pollinose  stripes,  narrowly  separated,  be- 
coming ob.solete  near  the  middle  ;  two  spots  of  the  same  colored  pollen 
ill  front  of  the  scutellum,  another  in  frontof  each  post-alar  callus,  on  th<' 
humeri,  and  a  spot  along  tho  dorso-pleural  suture  immediately  behind 
tbe  humeri.  Pleune  wholly  thickly  whitish  pollinose.  Scutellum  yel- 
low along  the  border.  Abdomen  reddish-yellow;  in  the  male  the  lirst 
segment  black,  whitish  pollinose,  yellow  on  the  sides ;  .second  segment 
ill  trout  (but  not  reaching  the  sides)  and  a  narrow  median  stripe  black, 
behind  extending  narrowly  to  the  sides,  more  brownish,  or  only 
slightly  brownish,  except  at  the  outer  ends,  forming  an  inverted  T, 
posterior  margin  of  the  segment  yellow;  third  segment  with  a  median 
iiiUTower  black  or  brown  stripe,  not  reachitig  the  front,  and  on  the 
liiiid  i)art  more  or  less  indistinctly  brownish  like  the  i)rece(ling;  f<  iirtli 
segment  on  the  disk  mostly  brownish-blacik  with  yellowish  pollen.  In 
tlie  female  the  black  on  the  .second  .segment  is  broader;  the  third  seg- 
ment bla(!k,  except  a  quadrangular  spot  in  front  on  eticli  sid;;,  and  the 
liiiid  margin,  yellow.  Front  and  middle  legs,  on  the  basal  hall" '>r  more  ot 
the  femora,  black,  reddish  yellow  el.si'where,  exec  pt  that  the  tibia*  may 
he.  .somewhat  brownish  before  the  tijt.  Hind  h'gs  black,  the  knees  only 
yellow.  Wings  hyaline,  third  longitudinal  vein  moderately  bent  into 
the  tirst  posterior  cell. 

Twenty-nine  si»eciinens,  Canada  (Hrodio),  Washington  Territory  (Mor 
rison),  Connecticut. 

The  synonymy  of  T.  albistylitm  .seems  probable  ;  the  only  dill'erence 


I ,' 


208 


ISULLKTIN    :!1,    UNITED    STATES    NATIONAL    MUSEUM. 


'.'.  '  (! 


that  the  (lcsciii)tio!i  seems  to  indicate  is  tliiit  the  frout  and  middle  fe- 
mora  are  more  broadly  yellow.  The  third  longit'idinal  vein  of  the  wing 
is  represented  straight  in  his  ligure,  but  Macquart's  figures  generally 
are  unreliable. 


i ;"!,!' 


Tropidia  mamillata. 

'I'rojniUft  mamillut'i  L(w\v,  Ccntur.,  i,  68. 

Hahiiat.—UVuunsl 

S .  Length,  8""".  Face  carinate,  with  whitish  pollen.  Antenna 
light  ochraceous.  Dorsum  of  thorax  blackish  bronze,  shining.  Pleurae 
ciuereous])()llinose.  Abdomen  near  the  base  black,  near  the  tip  fuscous, 
with  two  interrui>ted  reddish  bands.  Femora  black,  at  the  extreme 
tip  testaceous  ;  hind  femora  on  the  lower  side  near  the  base  armed  with 
a  strong  mammiform  process.  Front  and  middle  iibiie  simple,  reddisli 
yellow;  hind  tibia?  dilated,  arcuate,  fuscous  l)lack,  base  and  ui)pe;'  side 
reddish,  the  tip  i)roduc('d  into  a  tooth.  Tarsi  reddish-yellow,  fourth 
Joint  black,  the  fifth  joint  in  the  hind  ])air  or  in  all  fu.scous.  Ilalteres 
whitish.     Wings  cinereous  hyaline;  stigma  yellow. 

Translation,  compared  with  the  type.  Will  be  very  readily  recog- 
nized by  the  nuimmillate  tubercle  on  the  uuder  and  inner  side  of  the  base 
of  tiu5  hind  femora;  it  is  long  and  directed  inwards  and  backwards. 

Tropidia  calcarata,  ii.  up. 

Hahiiaf. — Mi(;higan ! 

9  .  Length,  t)""".  Head  black  ;  face  and  front  lightly  gray  pollinose. 
Antenuie  brownish  yellow ;  third  joint  verj"  large,  reaching  nearly  to 
the  oral  margin,  subcpuidrate  ;  arista  black.  Face  but  little  juoduced 
below  the  eyes,  the  lower  margin  of  the  cheeks  nearly  straight  and 
perpendicular  to  the  plane  of  the  occiput.  Thorax  black,  but  little 
shining;  humeri  and  pleura?  i»olliuose.  Abdomen  opaque,  blacK,  or 
dark  brown,  the  lateial  margins  of  the  second  and  third  .segments 
(broader  in  IVont  of  each)  yellow ;  both  of  these  segments  with  linear 
hind  margins  ;  fourth  segment  almost  wholly  light-grayish  polliiio.se. 
with  a  yellow  hind  margin.  Legs  dark-brown  or  black,  the  base  of 
tibia?,  an<l  the  three  basal  joints  of  frout  and  naddle  tarsi,  yellow, 
Wings  brownish,  clouded  on  outer  hall". 

(?.  Third  antennal  joint  smaller.  The  yellow  margins  of  the  second 
and  third  abdominal  .segments  extend  further  inward.  Hind  coxae 
with  a  large  obtuse  spur;  hind  tibia?  with  a  terminal  spur. 

One  male,  three  females,  Galesburg,  Michigan  (Dr.  Dimmock, 
National  Museum,  Prof.  Riley's  colle(;tion). 

The  third  joint  of  the  antenna?  is  much  larger,  the  face  shorter,  the 
dorsum  of  thorax  appai-ently  without  the  pollinose  stripes,  the  yellow 
markings  of  the?  abdomen  less  extensive,  and  the  hind  coxal  spur,  at 
once  distinguish  this  species  from  T.  quadrata;  from  T.  mamillata  itis 
as  readily  separated  by  the  absence  of  the  basal  femoral  spur. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIU.L 


•JOO 


ORIORIILXA.* 

Ciiorhina  Hortiiianiise^ijjc  in  Iitt.;siibgei!ii8,  Mtsiyen,  SvHt.  UeHcUr.,  iii,  2;>ti(lH5>2); 

St.  Fiirgeiin  luul  Servillo.  Km-ycl.  Mcth.,  x,  r>lH  (,lH5>r>) ;  genus,  Macquart,  Hist. 

Nut.  Dipt.,  i,  497  (IrtlU). 
Somtila  Macfinart,  Diju.  Exot.  ".if  Suppi.,  ."i7,  1847. 
Eriophora  I'liillipi,  Vcrli.  Zooi.  Bot.  (it'scll.,  xv,  ?;((),  Irtfi.'). 
Eurhlnomallolu  IJi;;;ot,  Aunalt'H  8()c.  Eut.  Frame,  \tij^'i\  Bull.,  No.  •>. 
Brachumji'm  Williston,  Can.  Ent.,  xiv,  77,  \ff^'i. 

Medium  to  larjje  sized  s])('t'ios,  l)la<',k  or  {irecni.sh  black,  witli  or 
without  ligiit  ground  marking.s.  Ih-ad  much  flattened,  l>roadcr  tlian  the 
thorax.  Anteiuiie  situated  upon  a  i>roininent  conical  frontal  proceswS, 
tbird  joint  orbicular,  or  broader  than  long;  arista  bare.  Face  moder- 
ately produce<l  below  the  eyes,  downward  or  forwanl,  in  profile  with  a 
irreater  or  less  convexity  in  the  middle.  K.ves  bare.  Scntellnm  dark, 
not  translucent.  Abdomen  elliptical  or  very  siiort  oval.  Legs  strong, 
liiiid  femora  not.  or  but  little,  Ihiitkened  {irrbond},  without  projections 
111' bristles  below,  hind  tibiic  sometimes  compressed  and  bent.  Marginal 
Lt'li  of  wings  open,  third  vein  nearly  straight,  cross-vein  beyond  the 
middle  of  discal  cell,  oblicjue. 

8iib-genus  CliIOKIIl2S'A.  Face  |)rodu<!ed  downwards,  and  forwards, 
rlic  probos(!is  more  or  less  elongate.  Kyesse])arated  in  the  male.  I^arge, 
thickly  i)ilose  species,  the  groundcrolor  black,  without  light  bands  or 
spots. 

Sid)genus  (JYlis'OIIHlNAt  'new).  Face  ])roduced  <lownwards,  (con- 
vex below,  proboscis  short.  Eyes  contiguous  in  the  male,  ."Moderately 
pilose  s])ecies,  the  g.ound-color  with  yellow  markings.  Tyi)e  C.  <innli.s 
MiiL'cj.  (also  Ct.fnlla.r  Linne,  Europe). 

Subgenus  SUM U LA.  Face  ])roduced  downwards,  convex  below, 
pioitoscis  short.  Eyes  well  .sei»arat('d  in  the  male.  iModerately  i)ilo,se 
species,  in  large  part  yellow.     See  ])age  21(5. 

The  gemrs  Criorliina  is  mu<!h  confused.  IMeigen  in  1822  (Syst.  IJeschr., 
iii,  23(i)divide<l  the  genus  IMilesia  into  two  sub  sections,  A  ami  15.  8ec- 
tioii  A  was  designated  as  '*  Fein  liaarige,"  ami  included  the  moden" 
Milcsia,  Sj)ilomyia,  and  Temnostoma.  Section  B  he  gave  as  "  Wollige. 
Ciioihina  Hgg  )",  iiuiluding  in  the  following  order  the  sjiecies,  M.  npi- 
cdta  ileig.  (=  aptformis  Schrank),  herher'ma^  (uacontha.  Jlocosft,  a-silica, 
riijicauda,  and  raiiniiciila.  The  lirst  of  these  was  figured  a*  typical. 
Mucquart  (Hist.  Nat.  Dipt.,  i,  41)7)  in  18.'}4  defined  ihe  genus,  retaining 
the  .species  in  the  same  order  and  adding  several  others,  and  also  figur- 
iii};  the  first  as  the  typical  species.  Meanwhile  St.  Fargeau  and  Serville 
Kiicycl.  iMeth.,  x,  518,  1825)  had  made  (i])ifor))iis  Schrank,  with  which 
cpimta  was  afterward  shown  to  be  synonymous,  the  tyi)e  of  a  new  genus, 
troiii  the  structure  of  the  face  (Focoia).  The  genus  can  only  thus  date 
li'oin  1834,  and  be  based  ui)on  Macquart's  description  rather  than  upou 


■f^ 


•  Kpiuf ,  a  ram ;  and  'Pic,  noae. 


t  Ku(Jv,  a  dog ;  and  'Pif,  uose. 


I': 


lt(n 


'4  li 


i! 


i'. 

11!:' 


ih 

''^i. 


'''['r 


:i 


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210  BL'LLKTIN    'M,    UNITED    STATES    NATIONAL    MUSEUM. 

liis  most  typical  species.  Ilis  detiiiitiuu  of  the  genus  is  as  follows 
•'  Corps  epais,  vein.  Face  i»n)loiig(!'e  infereureineiit,  h  lejiere  inocin- 
inence.  Front  etroit,  non  lineaire  i  .  Antennes  inserees  sur  une  saillie 
du  front,  premiere  article  tin  peu  allonge,  troisieuie  plus  large  que  Ion;', 
Jambes  posterieures  arqu«?es  et  comprim^es.  Ailea  6cartees,  premiere 
cellule  poHterieure  si  base  oblique." 

TABLE  OF  SPECIES. 

CKIOKIIINA. 

1. — Leg8  wholly  black;  abdomen  thickly  black  pilose  in  the  middle;  tip  of  fourth 

vein  bent  iuwardu nigripes 

Legs  in  part  red  or  yellow 2 

2. — First  joint  of  antenna  only  a  little  elongate;  tibife,  except  a  small  ring,  and  tin 

tarsi,  red verbosa 

First  joint  of  »ntennai  considerably  elongate;  proboscis  long;  base  of  tibiii-  yel- 
low ;  tarsi  in  large  part  black lupina 

CYXORHINA. 

1. — Face  without  yellow  i)rodnced  somewhat  forwards  below,  second  segment  ni  ;ili- 
doinen  broadly  and  third  and  fourth  narrowly  on  the  sides  yellow, 

umbratilis 

Face  in  large  part  yellow 2 

2. — Face  with  a  median  shining  black  stri])e  ;  second  segment  of  the  abdomen  on  thr 
sides,  continued  more  narrowly  on  the  third  yellow     .     .     .     intersistens 

Face  yellow,  without  a  median  black  stri])e 3 

3.— Abdomen  wholly  black armillata,  nigra 

Abdomen  with  yellow 4 

4. — Front  of  female  wholly  yellow  ;  abdomen  black,  excejtt  a  large  part  of  the  ibiii  tli 
and  the  whole  of  the  fifth  segments,  which  are  bright  orange  yellow 

analis 

Front  of  female  black  on  npper  part ;  abdomen  with  yellow  spots  or  bands    .    .    5 

5. — Abdomen  with  two  to  fourpairsof  yellow  side  spots,  touching  the  lateral  margins 

humeralis,  notata 
Abdomen  with  cross-bands,  the  first  interrupted,  the  others  entire    .     .     Bcitula 

Criorhina  nigripes.     (Plate  X,  hgs.l,  la.) 

llrachjimyia  (Eriophora)  nif/ripes  Williston,  Can.  Ent.,  xiv,  78,  1882. 
EiirhinamnUota  nigripes  Williston,  Proc.  Am.  Phil.  Soc,  xx,  IV.JO,  18H2. 

ITahilai. — California! 

9  .  Length,  1.'}"'".  Antennse  nearly  black,  first  joint  scarcely  longer 
than  the  second,  third  .joint  broader  than  long,  the  front  border  onlv 
gently  convex.  Face  in  the  middle  gently  convex,  thickly  covered  on 
the  sides  with  yellowish-white  jjollen,  the  median  8trix)e  and  broad 
cheeks  shining,  the  latter  thinly  yellowish  pilose.  Front  moderately 
broad,  shining  black,  with  black  )>ile,  on  the  vertex  with  yellow  pile. 
I'r<)bos(!is  not  very  long.  Posterior  orbits  rather  broad,  yellowish  d'-Med 
and  with  long,  yellowish  white  pile.  Thorax  with  abundant,  rather 
long  yellowish  pile  in  front,  black  across  the  middle  between  the  wiiijjs. 
behind  yellow,  abundant  and  bushy  on  the  i)ost-alar  callosities,  quite 
long  and  thick  on  the  scutellum.     Pleurae  with  dense  yellow  pile.    Ab- 


(^ 


HVNOl'Sl.S    OF    NORTH    A.MKUICAN    SYUFHllJ.E. 


(loiiitMi  Vfi  y  .short,  broad,  with  iibiiiidaiit  i)ile,  ishiiiiii;;  bhick,  the  secoiul 
st>Mii*'"t  oi)iUiue;  an  opaque,  laterally  abbreviated  cross-band  on  the 
third  segment;  pile  on  the  sides  of  the  tirst  and  second  segments  and 
on  the  fonrth  piid  lifth,  longer,  yellow,  elsewhere  black.  Legs  wholly 
black,  with  long  yellowish  pile.  Wings  with  a  distinct  blackish  shade 
on  ontei'  part. 
Kive  speciniens  (Morrison,  Baron). 

Criorhina  lupina.     ( Plato  IX,  (i<;«.  (I,  (in,  (M).) 

Uracil ijmijia  lupina  Williston,  Can.  Eiit.,  xiv,  77,  1882. 
I'hirhiiiamaUiila  lupina  Willisto!!,  I'roc.  Am.  Phil.  Soc,  xx,  330,  18Mi. 
f  Eiii-liiuomallota  metallica  Bif^ot,  Bullet,  bi-niens.  Soc.  Ent.  Fran,  (diafinosis 
only),  IS!<2. 

Habitat. — California ! 

^,9.  Length,  9  to  12'"'".  Black,  shining.  Antenna?  brownish-black, 
third. joint  at  the  base  sometimes,  second  joint  at  the  tip,  and  first  Joint, 
at  the  base,  reddish ;  tirst  Joint  twice  the  length  of  the  second,  third 
broader  than  long.  Face  thickly  clothed  with  yellowish  white  pollen 
ami  pile,  a  broad  median  strijje  and  the  cheeks  shining.  Front  in  fe- 
male broa.l,  dusted  on  the  .sides,  i)ile  long  and  yellowi.sh  on  the  sides; 
much  produced  downwards  and  forwards,  conical;  in  the  male  the 
tioiital  i)rocess  very  i)rominent  and  the  eyes  well  .se])aratedby  theswol- 
l(Mi  o;;ellar  callosity.  Po.sterior  orbits  thickly  light  gray  jjollino.se  and 
pilcKse.  Thorax  shining  metallic  black;  clothed  with  moderately  abun- 
dant and  very  long  light-reddish  yellow  i)ile,  on  the  ])leura*  whiti.sh. 
Abdomen  shining  black,  with  long,  rather  spar.se,  light-colored  i)ile. 
lA'gs  with  long  light-(u)lored  pile;  black,  the  extreme  tip  of  femora, 
basid  third  of  tibiae  and  baisal  joints  of  tarsi,  yellowi.sh  or  luteous,  the 
tibia!  otherwise  more  of  a  brown  color.  Wings  sub-hyaline,  with  a 
bhickish  shade  on  the  <mter  part,  the  cross-veins  in  some  specimens 
li;;litly  clouded. 

Four  specimens.  The  lu'oboscis  in  the  female  is  as  long  as  the  thorax, 
soiiiewhat  shorter  in  the  male. 

Criorhina  verbosa.     (Plate  X,  (ig.  li. ) 

Munca  loiiieiitona  Swcdenis,  Veteiisk.,  Ak.  Nya.  Handl.,  1787. 
Mili'nia  rerlwua  (Harris)  W.-ilker,  List,  etc.,  iii,  568. 
lUaclnipalpim  rerhomin  Otsti'ii  Sacken,  Catalofinc  Dipt.,  Kifi,  1^*78. 

Ilahitdt. — Eastern  Slates,  Canada  ! 

f.  Length,  Ki""".  Large,  black,  shining,  tlii<'kly  i)ilose.  Face  thii^kly 
iliitiied  on  the  side  with  yellowish-gray  pollen,  a  nunlian  stripe  from  the 
base  of  tlie  antennal  process,  and  the  cheeks,  shining  black.  Front 
latber  narrow,  shining  l)lack,  .somewhat  dusted  on  the  siiU's,  i)il»'  long, 
yellowi.sh.  Anteniiic:  lirst  joint  only  a  little  elongate,  nearly  black; 
sieond  Joint  red  or  brownish-red;  third  Joint  much  broader  than  long, 
iiansver.sely  oval,  brownish-black,  towards  the  base  more  or  less  red- 
dish.    Thorax  a  little  shining  above;  den.sely  i)ilose,  in  fiont  and  be- 


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BULLETIN    :U,    UNITED    STATES    NATIONAL    MUSEUM. 


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liiiul  yellow,  across  from  the  root  of  the  wings  black.  Pile  of  pleurae 
yt^llow.  Scutelluin  black,  with  lonj;  yellow  pile.  Abdoinoii  short,  broad, 
Nliiniug  black,  pile  yellow,  somewhat  intermixed  with  black  behind; 
on  the  first,  second,  and  part  of  the  third  segnjent  the  j,'ronnd  color  i,s 
obscured  by  jjrayish  dust  and  more  abundant  pile.  Le}?s  deep  red; 
femora,  except  the  tip,  black;  a  riufj  in  the  middle  of  the  tibite  deeper  in 
color,  or  black.  VVinfjs  hyaline,  a  little  clouded  on  outer  part. 
Three  specimens,  from  Massacthusetts  (Mr.  S.  Ilenshaw),  Maine. 

CYNOKIilNA. 

Cynorhina,  hiiI).  jh-h.  u<>\.,  aiitf.  \>.  -jiiK. 

Criorhlna  (Cynorhina)  umbratilis,  ti.sp.     i^I'latii  IX,  lij;.  7.) 

llabiUit, — Connccticrut  I 

9 .  licngth,  10""".  Face  black,  thickly  dusted  with  white  on  the  sides, 
a  median  stripe  and  the  cheeks  shining;'.  Antennal  process  rather  small, 
the  face  considerably  excavated  below,  produced  downward  and  some- 
wh;i!  f(»rwards.  Antenna'  reddish-brown,  thinl  joint  large,  orbicular, 
I'ront  broader  above  than  in  the  precedinjj  specMes,  mostly  shining,  with 
rather  long  yellowish  pile;  occinut  black,  with  yellowish  pile  and  gniy 
pollen.  Thorax  shining  black,  with  rather  abundant,  obscurely  yellow 
])ilf,  black  across  the  mid<lle.  yellow  on  the  scutellum  and  pleura;, 
Abdouu'u  short,  oval;  black,  shining,  with  short  black  pile;  sides  of  sec- 
ond segment  broadly,  the  third  less  so,  the  fourth  narrowly  orange  yd 
low ;  the  ground  color  is,  h()Wev«'r,  almost  wholly  obscured  by  thick 
woolly  orangeyellow  pile,  extending  less  broadly  on  the  sides  of  the 
tiiird  segment,  and  murowly  on  the  margin  of  the  fourth;  pile  of  .sec 
ond  segment  in  the  middle  short,  yellow.  Legs  blaclc,  with  yellowish- 
Avliitt'  [)ile;  base  of  middle  femora,  basal  two-thirds  of  hind  femora,  basiil 
end  of  front  and  middle  tibia",  and  all  the  tarsi,  except  the  last  two  joints 
and  hind  metatarsi,  yellow.  Wings  somewhat  brownish,  lighter  at  tlit' 
base,  a  d.irker  cloud  near  the  furcration  of  second  and  third  veins. 

One  s|ie(;imen,  ol)t;iined  from  the  blossoms  of  Prunun  virginianvs,  iu 
fliinc,  Connecticut. 

• 

Cilorhina  (Cynorhina)  i-itersistens. 

.'  Xf/lota  rmlia  Walker,  List,  ctt-.,  iii,  059. 

Krinlalift  inli'vsiintt'ii^  WalliiT,  List,  etc.,  iii,  01"). 

/w'»«t  noriiDi,  htulin  O.stfii  .^.•tckcii,  Cat.  Diiit.,  1:^8;  note  248,  p.  253, 1878. 

Hdhiint. — \Vliit«'  Mountains.  Is«'w  Hampshire,  Pennsylvania,  Minue- 
sota!,  New  Jersey  (Walk.). 

$.9.  Lcngtii.  '.)  lo  1 1""".  l'\M'e  yellowish  white,  thickly  coveidl 
wirli  silvny  du.st,  in  the  middle  a  sliiuing  black  stripe,  reaching  from 
oi  iM'iir  liiise  of  anrenual  pnxje.ss  to  oral  margin;  cheeks  black,  shiuiii;;; 
antenna'  l>la('k,  third  jnint  orl)i('ulai',  brown.  Fi'ont  in  lemale  sh.'Tiiii;: 
black,  with  dusi  on  Ihesides.  Fiontal  triangle  black,  shiuing,  with  dust 
near  the  orbits.    Occiput  black,  with  whitish  pile  and  thickly  covered 


with  gn 
dusky  p 
sbiuing 
the  last 
with  a 
and  con 
broadly 
yellow, 
except  I 
and  hist 
middle 
and  tip. 

Two 
Mountai 
speeiniei 
of  the  ai 
base,  ye' 

1  do  n 
said  of  t 
as  the  ( 
based  o 
Sacken, 

Three 
23,  from 

Criorhina 

C'riVi 

HnbiU 
''$.  L 
low;  up] 
l)ik*;  a  I 
black;  t 
with  eiei 
ing,  clot 
the  nasc 
l)lack  ;  i 
(lie  of  cii 
low ;  thi 
wiiiys  ai 
extends 
within  t 
the  first 
the  vein 
'•A  si 
Desci 


I  .  t,. 


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14 


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BUM. 

ile  of  pIeur£B 
short,  broad, 
ack  behind; 
)nnd  color  is 
:s  deep  red; 
iie  deeper  ill 
art. 
,  Maine. 


Dii  the  sides, 
ather  small, 
1  and  some- 
e,  orbicular, 
liining,  with 
lie  and  gray 
irely  yellow 
ind  pleura, 
sides  of  sec- 
orange  yd 
*d  by  thick 
(ides  of  tilt' 
pile  of  .sec- 
I  yellowish- 
mora,  basal 
it  two  joints 
>hter  at  the 
veins. 
yinianvs,  iu 


,  1878. 
lia,  Miiiue 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHID^. 


•J  13 


with  grayish  dust.  Thorax  greenish- black,  shining,  with  rather  long 
dusky  pile,  more  abundant  and  whitish  on  the  i>lenrai.  Abdoriicti  dcei) 
.shilling  greenish-blach,  with  short  erect  black  pile,  on  the  sides  and  on 
the  last  segment  longer,  yellowish  white  ;  .secoiul  .segment  on  the  sides 
with  a  large  yellow  triangle,  reaching  the  whole  length  of  the  segment 
and  continuous  on  the  side  of  the  third,  narrowly  in  the  male,  more 
brdadly  in  the  female,  clothed  with  abundant  yellow  i)ile.  Legs  chiefly 
yellow,  with  light  yellowi.sh  pile;  front  femora,  except  the  ti]),  middle, 
except  ba.se  and  end,  and  the  hind  ])air,  excei)t  a  broad  ]>reai)ica]  ring, 
and  last  three  joints  of  all  the  tarsi,  black  ;  front  tibi;e  with  a  mo<ierate, 
middle  with  a  narrow  ring  beyond  the  middle,  hind  tibia*,  except  ba.-^e 
and  tip,  and  hind  metatarsi,  except  the  tij),  brownish  or  brownish-black. 

Two  specimens  (Nos.  1510,  1511),  from  near  (Hen  House,  White 
Mountains,  New  Hampshire  (Dr.  (leorge  Dimmock).  A  single  male 
specimen  from  Minnesota  (from  ^h'.  E.  Keen)  dilfers  in  the  third  joint 
of  the  antennae  being  more  yellowish  and  the  frAit  femora  at  the  very 
base,  yellow. 

1  do  not  doubt  that  this  is  Walker's  27W,s7i///a'  infersistens ;  nothing  is 
said  of  the  black  facial  stripe  in  X.  badia.  "The  .synonymy  is  doubtful, 
as  the  description  of  the  face  does  not  quite  agree;  it  is  principally 
based  on  my  recollection  of  the  types  at  the  British  Museum." — O. 
Sacken,  1.  c. 

Tliree  specimens  {S  ,9),  from  Fairmount  Park,  Pennsylvania,  May 
23,  from  Mr.  E.  Keen. 

Criorhina  (Cynorhina)  armillata. 

Criorhiva  armiUafa  Ostcn  Sacken,  Bull.  Buff.  Soc,  N.  Sci,,  ill,  68;  Cat.  Dipt., 
a.',!,  1878. 

Eabitat.—Qmbec  (O.  S.)\ 

"  $  .  Length,  1 1  to  12™'".  Face  and  front  above  the  antennae  honey-yel- 
h)w;  upi)er  part  of  front  and  vertex  blackish-bronze  color,  with  fulvou.s 
pile;  a  black  spot  on  the 'cheeks;  antenna;  yellow  ferruginous,  arista 
black;  thoracic  dorsum  and  scutellum  greenish-bronze  color,  clothed 
with  eiect  fulvous  pile  ;  pleura'  and  pectus  black.  Abdomen  black,  .shin- 
ing, clothed  with  black  pile ;  a  [small]  tuft  of  yellow  pile  on  eiich  side  at 
the  ba.se.  Ilalteres  yellow.  (JoxiB  and  about  two  thirds  of  the  femora 
black  ;  the  end  of  the  latter,  the  tibite,  except  a  black  ring  iu  the  mid- 
dle of  each,  and  the  three  basal  joints  of  the  tarsi  are  of  a  saturate  yel- 
low ;  the  last  two  tarsal  joints  black.  The  proximal  two-thirds  tA'  th<) 
wings  are  tinged  with  yellowish,  the  remainder  is  gray;  the  latter  color 
extends  along  the  posterior  margin  as  far  as  the  axill.iry  incision; 
witiiiii  the  yellow  portion  there  is  a  hyaline  spot  in  the  angle  between 
the  llrst  and  second  veins  (at  the  proximal  end  of  the  marginal  cell) ; 
the  veins  near  the  root  of  the  wings  are  all  tinged  with  yelh>w. 

'•A  single  female  specimen." — O.  Sacken. 

Description  compared  with  the  type  .specimen  at  Cambridge. 


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I!i  1.M;TIN    :I1,    UNITED    STATES    NATIONAL    MUSEUM. 


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M 


Criorlii:ia  {Cynoihina^  nigra,  ii.  h|i. 

Uahihtl. — New  Ilaiiijfsliiri*! 

9.  licnytli,  7""".  Lower  part  of  tlni  front,  anteiinte,  and  face,  reddish 
yellow;  IVont  above,  black  ;  clieelvN  sliinin<if,  bla(;k  ;  dorsum  of  thorax 
black,  sliiniiiji',  with  a  bronze  reflection  ;  i)ile  short  and  not  abundant, 
yellow.  Abdomen  wholly  black,  shinin;,',  nearly  bare ;  i)ile  on  the  sidw 
in  front  rather  abundant  and  lonj;,  li^jht  yi'llow.  Let's  black  ;  knees, 
tip  of  tibiae  and  of  tarsal  joints,  luteous.  Winji's  lightly  infuscated; 
base  yellow. 

One  specimen,  White  Mountains  (National  Museum,  Professor  Uilev's 
collection).  This  species  is  closely  allied,  evidently,  with  C.  armiUata; 
but  will  be  readily  distinguisbed  by  the  black  legs. 

Criorhina  (Cynorhina)  analis.     (I'latc  IX,  ti^.  :».) 

Milenia  auolix  Mttciiiiart,  |)iiit.  Kxot.,  ii,  '2,  7it  ;  tal».  ir>,  tijj.  '2. 

Criorhina  analin  OsUn  .Saekt-ti,  Cat.  Dipt.,  13(i ;  Willislon,  Proc.  Am.  Phil.  Soc, 

XX,  :{:{0. 

^M/n/«^— Eastern  States ! 

cJ  ,  9  .  Length,  9  to  12""".  Face  light  reddish  yellow,  the  sides 
lightly  duste«l  with  white,  nearly  peri)endicular  below  the  proniiiieiit 
anteniial  proc^ess,  gently  convex  on  the  middle  ;  cheeks  black,  or  with  a 
blackish  stripe.  Antenua;  of  the  .same  color  as  the  face,  the  first  two 
joints  with  short  blaitk  pile  above,  third  Joint  l.trge,  ronndecL  Front  in 
female  nearly  of  the  same  color,  shining  below,  <lnste«l  and  with  short 
yellowish  pile  above;  on  the  vertex  or  upper  third  blaitkish;  frontiiitri 
angle  shining,  of  the  sume  cofor  a.s  face.  Occiput  black,  dusted  witli 
white  near  the  orbits.  Eyes  (»f  male  contiguous  lor  a  short  distiuite. 
Thorax  shining,  greenish  black,  with  moderately  abundant  light-cohtiHi 
pile;  hiuneri  and  ]»leura'<lusted  with  whitish  and  with  more  wliitish 
pile.  AbdoMHMi  bbiisli  black,  shining,  with  short  black  pile,  on  the  side- 
of  tile  ,>.ec()iid  .segment,  longer,  whitish  ;  the  black  encroaches  moiv 
oi'  less  on  tiie  fourth  .segment,  usually  forming  a  more  or  less  triangular 
dilatation;  remainder  of  theai)domen  conspicuously  orange-yellow,  witli 
the  same  colored  pile.  Legs  chiefly  black,  with  black  and  light  yellow 
})ile ;  tip  of  femora,  the  base  and  end  of  rhe  front  and  middle  tibiie,  and 
the  narrow  base  and  abrupt  end  of  hind  tibiie,  and  all  the  tarsi,  except 
the  last  two  joints,  light  yellow;  the  front  and  middle  tibiic  more 
brownish  in  the  middle.     Wings  hyaline,  a  little  yellowish  in  front. 

Xunu'rous  sjiecimens. 

Criorhina  (Cynorhina)  bumeralis.     (Pliitf  IX,  li<i.s.  4, 4«.) 

(jfinrhinn  /iMmcrrt/i't  Williston,  Proc,  Am.  Phil.  Soc,  xx,  330. 
ffahitaf. — Washington  Territory,  California  ! 


(?,5.  Length,  1(»  t(t  11"'"',     Face  light  yellow,  with  whiti.sh  dnist 
the  side.-i.  shining  in  the  middle;  cheeks  blackish.     Antenna?  more  r 
dish  yellow,  third  joint  orbi(rular.     Frontal  triangle,  and  the  front  ni 
female  on  the  lower  part,  colored  like  the  face,  upper  half  of  front  black; 
pile  yellowish,  short.    Thorax  shining   black,  pile  yellowish;  humeri 


on 
■ed- 

in 


SYNOI'yiS    OF    NORTH    AMKKICAN    SYliPHIDiE. 


215 


iiiid  a  spot  on  the  upp«'r  part  oi  iiuvso  pk'iira>,»)pa(pie  yellow.  Margin  of 
scntelluin  yellow.  Alxlomen  black,  .second  sej;nient  on  the  sides  with  a 
liirjce  trianjjular yellow  spot;  in  the  female  the  thirdand  fourth  sejjnients 
on  the  sides  in  front  with  a  rectanfjnlaispot,  broadly  separated,  and  the 
fifth  sefjnient  yellow,  except  the  black  tip,  which  is  prolonj{e<l  narrowly 
to  the  front  in  the  niid<lle;  in  the  single  tnales|)eciMien  the  yellow  spots 
on  the  third  sejjinentare  snniller,  and  the  fourth  and  lifth  sejjnients  are 
wholly  black.  Legs  yellow,  front  and  middle  femora  at  the  base,  a  rinj;' 
before  the  tip  of  hind  femora,  and  likewise  of  the  hind  tibia',  brownish 
black;  posterior  metatarsi  infuscate,  last  three  Joints  of  all  the  tarsi 
black.  Wings  hyaline,  somewhat  clouded  on  the  outer  part,  the  veins 
at  the  basi'^and  in  front  yellow. 

Two  si)ecim  ns.  An  additional  female  in  the  M.  C.  Z.  (Loew'8  col- 
lection) from  California. 

This  may  be  the  same  species  as  the  followiii},' : 

Criorhina  (Cynorhina)  notata. 

Milenia  Ho^f/n  WiiMlt'iiiiiiiti,  Aiiss.  Zw.  Ins.,  ii,  10S>,  7 ;   Macquart,  Dipt.  Exot., 

ii,  2,  fO,  i>;  till).  XV,  li<;.  .^ 
tSiiri>hiin  pro/iiniiH  VV.-iIkt-r.  Li.sf,  etc.,  iii,  .'J7y. 

Habitat. — Savannah  (VVied.). 

/Enea,  abdomine  nigro,  maculis  duabus,  scutelli  apice,  }jeniculi.s(pui 
ferrugineis.  Kiickenschild  erzfarben;  Hinte»leibschwarz,zwei  Flecken, 
Si)itze  des  Hcliildchens  und  Kniee  rostgelb.  —  I.ange  o.^  Linien,  $  . 

Antenna'  blackish-brown,  hind  border  of  third  Joint  ferruginou." 
yellow.  F;u!e  yellow,  lik»'  half  bleached  wax,  in  some  reflections  nearly 
brassy-yellow  shining;  low«'st  parr  of  Iront,  on  which  the  antenna'  are 
situated,  similar.  Thorax  yellowish  metallic  with  yellow  ])ile,  base  of 
.seutellum  blackish,  tij)  yellow.  J'leuia' blackish,  with  a  broad  yellow- 
isli  metallii!  strii)e  covered  with  yellow  i)ile.  Aixhmien  black  with  yel- 
lowish pile;  base  of  second  and  third  segments  on  each  side  with  a 
small  ferruginous  spctt,  on  the  .second  the  inner  «'nd  cre.scentric,  on  the 
tliird  the  spot  is  shorter,  nearly  quadrate.  Wings  nearly  hyaline,  the 
eosta  strongly  yellowish,  towards  the  end  a  little  brownish,  the  basal 
veins,  the  .stigma  and  the  haiteres  yelli-wisli.  Legs  i>itchy-blackish 
bntwii,  bi'..se  and  tip  of  the  femora  ferruginous  yellow,  tibia*  the  same, 
in  .some  reflections  a  little  whitish ;  hind  tibiu'  in  the  middle  broadly 
brown;  anterior  tarsi  ferruginous  yellow  with  brown  tip,  hind  ones 
nearly  wholly  brown. — Translation  from  Wiedemann,  I.  c. 

This  species  mnst  be  very  similar  to  the  j)receding;  \t  may  be  the 
same,  but  comparison  is  nee<led  with  ICastern  specimens  before  sup- 
lae.ssing  humeralis.     See  Criorhina  pictipcs,  Ai)pendix. 

Criorhina  (Cynorhina)  scitula. 

Crinrlihia  xriiiila  Willistoii,  Proc,  Am.  I'lul.  Soc,  xx,  :!:!!. 

Habitat. — Washington  Territory  ! 

^  ,  9  .  Ji«'ngtli.  10  to  i;V""'.    Face  yellow,  with  whitish  (bi.st  on  the  side.s, 
considerably  concave  below  the  antenna'  in  the  male,  in  the  female  less 


(lit' 


216 


HILLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


M\ 


v.S 


\'i ' 


80;  prixluccd  dowiiwunlH.  Front  in  tViniilc  Itlat-k  on  uppn-  pint,  with 
Hliort  l)la<'ki.s)i  ]>iU',  below  like  tin*  t'ai'o ;  tVoiitiil  triaii;:l<'  in  male  ycllnw, 
vyvn  ratlier  nioir,  conti^ruoiis  than  in  aim  I  is, {hi'  frontal  process  i'atli«Ml('>s 
l)roJ('(rtin{j;.  Anteninu  yellowish  hrown,  or  blackish  brown,  the  secdnd 
joint  Hoinetiines  yellow  with  Ihutk  above,  the  third  Joint  always  of i, 
lifjhter  color  below.  Thoiax  Hhininjj:  {greenish  black ;  dorsiiin  witli 
blackish  |)ile  across  the  middle,  in  front  and  on  the  Ncutellntn,  yellow; 
luiineri  yellow  with  a  small  continent  sjmt  below,  ineso-plenra'  yellow. 
ish  gray  pollinose  and  pilose.  Hcntellum  black,  the  edf-e  someiiincN 
narrowly  Inteons.  Abdomen  black ;  sectond  segment  opaipie,  with 
two  large  yellow  spots,  narrcjwly  separate<l,  rounded  on  their  iiiiicr 
ends  and  narrowed  toward  the  margin;  third  segment  with  a  yellow 
cross-band  on  the  anterior  part,  doubly  convex  behind  (the  great(>i 
convexity  being  toward  the  middle),  with  a  sharp,  median  angular  in 
cision  behind,  md  attenuated  nearly  to  a  point  on  the  sides  of  the  ;ili 
domen  ;  fonvtli  segment  similar  in  female,  in  male  wholly  black,  oi 
with  a  triangular  spot  in  front  and  reddish  behind  ;  hypopygiuni  inl 
dish  or  yellow .  llfth  segment  in  female  yellow  in  front;  black  at  ti|i. 
Front  coxic  white  pollinose  in  front;  all  the  femora  black,  exccj)!  ihi- 
tip;  front  an<l  middle  tibije  and  metatarsi  yellow  or  reddish  yellow: 
hiud  tibiai  yellow  at  the  base  and  tip,  a  broad  ring  in  their  middle,  iiml 
the  hind  tarsi,  blackish  brown.  Wings  yellowish  hyaline. 
Four  s))ecimens. 


■!  '    I 


SOMULA.* 

Criorhina  (Somula)  decora.     (Plate  X,  iigH.  :!,  '.ia,  3b.) 

Soinula  dcioia  Maciiiiart,  Dipt.  Exot.,  ^  Suiij)].,  57,  1;   tab.  ii,  flg.  11;   Osttii 
Siu-keii,  Cat.  Dipt.,  13r!. 

HahHat. — Eastern  and  Middle  States ! 

5,9.  Length,  14  to  1(!""".  Antenna!  process  conical,  very  prominent. 
Aniennte  brownish-black.  Face  ')elow  the  antennal  process  very  slight- 
ly concave,  descending  i)erpendicularly  considerably  below  the  eyes; 
gently  convex,  light  yellow,  shining,  except  near  the  eyes  a  small  s])ot 
is  whitish  dusted.  Cheeks  shining  black.  Front  in  the  female  black 
on  the  ui)per  part ;  below  in  both  sexes  the  upper  part  of  the  antenuiil 
process  is  black,  the  yellow  of  the  face  extends  upon  each  side,  cuttiiii; 
ott'  the  black  of  the  upper  portion  from  that  below  ;  i)ileof  the  front  and 
the  ujtper  part  of  the  occiput  black,  on  the  narrow  orbits  below  liglir 
yellow.  Thorax  deeply  shining  metallic  greenish-black,  with  slioif. 
sparse,  and  obscurely  yellowish  and  black  pile  ;  humeri  opaque  yellow. 
with  yellow  pile,  meso-pleunB  with  a  large  oval  yellow  spot  and  abiiii 
dant  yellow  pile.  Scutellum  like  the  thorax.  Tegnlai  yellow.  Abdo- 
men black,  with  three  or  four  i)airs  of  consi)icuous,  oblique,  large,  ovnl. 
bright  yellow,  opaque  spots;    the  first  pair  on   the  second  segment, 

*  For  tbe  dcliiiitioii  of  this  j^eun.s  see  page  209. 


SYNOPSIS    OF    NORTH    AMERICAN    SYKI'IIID/E. 


217 


broijdcr  towiirds  the?  lulddU', concave  in  front  and  direi^tiMl  backwards  and 
oiil  wards,  hut  not  rca<!liin;;  the  sides,  the  siih's  of  the  sejinu-nt  narrowly 
yellow,  with  .veMow  pile,  the  black  opaque,  except  a  posterior  metallic 
cross-band,  broadest  in  the  middle;  third  segment  similar,  except  that 
the  spots  are  less  nari'owed  outward,  and  the  ant<'rior  marfjin  is  nar 
i(»\vly  sinning' ;  fourth  sefrment  like  the  third,  ex<!ept  that  the  yellow 
sjiots  are  broa<U'r.  shorter,  and  more  oval,  tlie  ntetallic  of  the  front  bor- 
iliT  narrower  and  contined  mostly  to  the  si<les ;  hfth  sefjrnent  in  the 
female  with  the  si>ots  small  and  nearly  rounded.  The  posterior  se;rmcnts 
iiiai;^iiie(l  with  y«'llow  behiml  and  clothed  with  yellow  i)ile,  most  abun- 
(huit  on  the  last  se<jment.  Venter  black,  shininfj,  with  narrow  yellow 
liiiid  mar^jins  to  the  sefjinents.  l^egs  li;;ht  yellow,  the  immediate?  base 
of  all  the  femora  (on  the  hiiul  pair  the  innei'  side  for  nearly  a  third  of 
tbeir  lenjilh)  and  the  last  three  joints  of  all  the  tarsi  black;  the  fore 
ami  hind  tarsi  on  their  first  two  joints  and  the  tip  of  the  hind  tibiie  red. 
Wiufjs  (lark  brown  in  front,  lighter  beyond  the  cross-vein  the  posterior 
part  hyaline. 
Twelve  specimens,  Conuecticut,  Massachusetts,  and  Pennsylvania. 


CRIOPRORA.* 

irhprnni  OHten  Sacken,  Cut.  Dipt.,  '2bl,  note  •241,  1878. 

LarjiC,  black  species,  thickly  or  loujj  pilose.  Head  not  broader  than 
the  thorax.  Eyes  bare,  subcontijiuous.  Aiitennre  situated  below  the 
iiiiildle  of  the  head  in  i)rofde,  the  iirst  two  joints  a  little  elon}>ated,  the 
tliinl  oblicpiely  oval ;  arista  bare.  Face  laterally  compressed,  forming? 
a  rounded  ridjic  in  the  middle,  on  the  upper  part  sometimes  sharply 
lidgcd,  i)roduced  nearly  forwards,  more  or  le.ss  snout  like,  gently  con- 
cave from  antenna'  to  tip,  the  end  notched,  ('heeks  not  broad,  the 
lower  border  nearly  at  right  angles  to  the  plane  of  the  occiput.  Tho- 
rax rather  short  and  broiid.  Abdomen  oval.  Legs  stout,  the  hind 
femora  more  or  less  thickened,  with  s])ines  below;  in  the  male  tlu^  hind 
coxie  sometimes  tuberculat*'  and  the  femora  and  the  1il)ia'  bent.  Mar- 
ginal ceil  of  wings  oi»en  ;  third  longitudinal  vein  nearly  straight;  cross- 
vein  beyond  the  middle  of  the  discal  cell  and  oblique.  Type  of  genus 
C.  (ihpcr  O.  JS.,  North  America. 

TAULi:  OF  Sl'KCIES. 

1.— l)()rsum  of  tlioiiixclotliL'd  witli  tliick  yellow,  or  reddish-yellow  pile,  on  tlie  plcii- 

r:e  black  ;  wiiij^.s  with   lirowiiisli  elouds  aloiijj  the  veiiiM 2 

Dorsum  of  thorax  clothed  witiilong,  ;;rayisli  or  yellowisli-jfray  jiile,  on  the  pleu- 
ra'yellowish-white;  al.donieii  deei)  Iduisli-iiietallie      .     .      <  cyanogaster 

(  cyanella 

2— From  ill    female  hroail,   with   yellow    ]iile  ;    hind   femora   somewhat   iiicrassate, 

alopex 

Front  in  female  clotheil  with  IdacU  pile  ;  hind  femora  thickened,  in  male  mech 

more  so  and  riirved femorata 


*  Kij'ioi,  a  ram;   ni}S}()a,  front. 


1  '1 

1 


tl 


I     *l 


u 


21S 


III  l.l.miN    :tl,    IMTKI)   STATKS    NATIUNAl.    Ml  HKUM. 


M. : 


'(' 


!!(  h) 


Ciiopiora  cyanognster. 

lU'uilniiiiilpiiH  iiiiiiiDiiii'ter  Lofw,  CViit iir.,  X,  Til. 

<'rii>jiniiii  <i,iitit>tiiiHli  V  f)Htt}i\  HiM'ktMi,  Cut.  Dipt.,  \'M\,  iidIc '.'11,  p.  'i.M. 

Jlohifiil. —  IN'mi.sylviiiiiii  (Loew),  ('ol(»rii(I() ! 

9.     LciiyHi,     II""".     Black,    wliifc     pilosr.      A  ImIoiih  ti     viol?ici'(»iis. 

DlarU,  .sliiiiiii;;,  white  piloMr.     Head  of  the  .saiiii lor.     i\iit('iiii:i'  li^ 

<'oiis  hiack,  llrst  two  Joiiit.s  nitlicr  loii<;:,  tliir<l  ol)lii|iii'.  Doisiiin  nf 
thora.x  and  sciitcllntn  luon/chlack.  AIhIoiiicii  rat  Iter  l>i()a<i  and  shmt 
Ii;;ldl.v  viokM'coiis.  wliitc  pilose,  the  third  .sey:iiM'iit,  except  the  latt'iMl 
iiiai';;iii.s  and  the  fourth  ,se;»in«'nt,  e.xeept  snuw  while  pile  on  the  disk, 
elothe<l  witii  shorter  lilaek  pile.  Lej^H  wholly  hlaek,  white  pilosi-;  hiiiii 
femora  .Htoiit,  but  not  in<Tas,sate,  near  the  tip  l»elow  suliexei.sed.  .niil 
provided  with  riyid  black  setnl»\  Head  of  the  lialtere.s  <hlntely  yellow 
ish,  .stem  In.scous;  te;>'uhe  white.  \Vin;;'s  cinereous,  h\ aline,  near  tin' 
ti)>  more  saturate  cinere(Mis.  Tip  of  cutstal  cell  and  sticma  wholly  di 
lutely  infuseate.  Veins  fn.sconsl)la<;k,  the  transversal  ones  .slenderly 
<'louded  with  fuscou.s. — Translation  from  iu-ijiinal. 

^.  Leiiyth,  Ili"'"'.  Heiul  in  profile  like  that  of  (\  fviuoratn.  Kvcs 
narrowly  separated  below  th«'  ocelli;  frontal  trianjile  li<,dit  yellowisji 
jiiiay  |(ollino.se,  except  a  median  shininjj  strip*',  tin*  j;round-«!olor  on  ench 
.si«b'  below  luteous.  Antenna-  yellowish-brown.  Dorsum  of  thorax  and 
s<Mitellnm  rather  thickly  elothe<l  with  lifjlit  yellowish  {jray  pile;  on  tlic 
pleura'  of  the  .same  color.  Abdomen  eloiifjate,  not  broader  than  tlic 
thorax,  sbiidn^.  First  .sefi'ineid  and  ba.se  of  second  bronzy  ;  remaiiidcr 
violat-eous.  Third  ami  fourth  sej^ments  wholly  bhtck  pilose.  Noopa(iiU' 
black  cross  bantls.  Tarsi  dark  retldish  brown;  i>ile  of  femora  in  Iai};t' 
part  black;  hind  femora  incrassate  and  arcuate;  hind  tibise  uilatcd 
and  with  an  obtuse  any:le  on  the  inner  side  above. 

One  specimen,  Colorado  (Morri.son),  altitude  8,000  feet.  Then*  art' 
some  discrepancies  from  the  (uif-iiial  description,  but  I  woidd  not  cou 
sider  them  more  than  individual  or  varietal  without  coniparLsun  of 
Easteiti  specimens  in  both  .sexes.  My  male  diU'eis  very  distim-tly  from 
that  of  ('.  cyanclla,  in  the  less  jtroduced  epistonia,  more  thickened  and 
arcuate  hind  femora,  and,  perhaps,  also,  in  the  nu)re  slender  abdoincn, 
The  absence  of  the  opaque  bands  of  the  abdomen  in  the  male,  will  at 
once  distiiifjuish  them.  My  femalo  of  C.  ci/anella  has  an  opaque  band. 
aiul  as  Osten  Sacken  did  not  indicate  its  presence  in  the  female  in  lii.>i 
orijiiiial  description,  <lrawn  from  both  sexes,  I  am  at  a  loss  whether  to 
consider  it  a  sexual  or  ir.dividual  character. 

Crioprora  cyanella.     (Platf  X,  lij;.  (i. ) 

I  I'ocota  ejianella  Osten  Saiki'ii,  West.   Dipt.,  :<:$1). 

Crioiirorn  vijuiieUa  O.sti'ii  .Sacken,  Cat.  Dipt.,  1:56,  note  '241,  p.  251. 

Habitat. — California ! 

5,9.     Length,  8  to  10""".    Face  black, shining',  much  produced  snout 
like,  very  conical  at  tip ;  on  each  side  of  this  snout  a  broad  stripe  ot' 
grayish  pollen  somewhat  c^uiceals  the  black  ground  color.     Front  and 


^'■t 


SYNOPSIS    Of    NftlM'M    .\MKIM('\N    sVI,'PIIir>.K. 


1M1» 


vertex  black,  but  little  sliiiiiii;-  in  tlie  reiiiiiU-  and  tliiekly  elotlied  with 
yellowish  wliite  pile,  some  of  which  ileseeiids  iihtiiy  the  side  of  the  f'ae«', 
Itelttw  the  antenna-;  the  oeeipnt  ami  the  posterior  an<l  interior  orl)its 
beset  with  pile  of  the  same  <;(»lor.  Antenna-  brown,  llrst  Joint  some- 
rimes  paler;  arista  reddish.  Thorax  metallii-  ^reenishlilat-k,  rather 
tbiekly  clothed  with  lon^'  pile,  wlii(-h  does  ncd.  however,  much  obsenre 
the  ground  color ;  the  pile  on  the  dorsum  is  oltsciirely  vellowish  or  dull 
lirayish,  moie  .vellowishwhite  on  the  pleura-.  Ilalleres  brownish.  Al»- 
(lonn-n  dark  or  cobalt,  bine,  beset,  especially  on  the  sides  with  hmn' 
whitish  pile,  in  the  middle  more  or  less  short  and  bhick  ;  in  the  inalu 
tin-  second  se;iineiit  is  opa<pn-  bhn'k,  exc»'pt  a  trian;;le  on  each  side  and 
a  narrow  hind  mar;>'in,  whi<-,h  are  shinin;;';  the  third  sej^ment  has  an 
iircnated,  somewhat  nai-row,  opa(|ne  black  i-ross  band,  sonu'times  inter- 
iiipted  in  iIh' ndddle.  Leys  black ;  tibia-  sometimes  brown;  knees  of 
the  Mrst  two  pairs  yellowish  bi-own ;  le<;s  beset  with  whitish  pih-,  lonj(er 
Oil  the  femora  ;  hind  femora  somewhat  thickened;  hind  tibia-  rather 
stont  and  somewhat  cnrved,  espe«-ndly  on  the  distal  part.  Winys  snb- 
hyaline,  j'Tayish. 

Two  males  ami  one  fenude  (O.T.  r»aron),  California.  This  des(;ri|>tion 
is  hilt  little  amend(-d  from  the  orij^inal,  also  drawn  from  \h\vv  specimens. 
My  temale,  which  nni.  be  siunewhat  teneral,  has  the  le;,fs  also  more  re<l- 
dish,  the  .second  sejrnient  opaqne  in  front,  dilated  in  the  ndddle  behind 
to  a  point,  the  hind  femora  are  a  little  less  thickened,  and  the  hind 
tit)iiL'  a  little  h-ss  bent.  IJaron  Osten  Sacken's  sjiecimens  were  reared 
from  pupa' found  in  February  under  the  bark  of  QuercuH  (ujrifol''  i. 

Crioproia  femorata.     (Phite  X,  ti^js.  .'i.  .">«.) 

Crioprora  fvmorttitt  Willi.stoii,  Proc.  Am.  Phil.  Soc,  \x.  !1'J9 

Habitat. — Orej^on,  \Vashinj;lon  Territoiy I 

d  ,  9  .  Lenjith.  l.j  to  1(5""".  l)(-ep  shiniiij;  black.  Front  in  female 
.somewhat  nairowed  above,  with  black  pile,  a  little  less  shining  and 
I'oppery- colored  above  in  the  male,  at  least  a  spot  of  whitish  dust  above 
the  antennic  on  the  side.  I\v«-s  in  mah-  narr<»wly  separated  below  the 
ocelli.  Face  everywln-ie  shiniip^,  bar<-,  oidy  mo(l(-rat(-ly  i»rodn«!ed  and 
obtuse  below,  Anleniue  reddish  blown ;  arista  yellow.  Dorsum  of 
thorax  and  seutellnm  shininji'  metallic  blac-k,  with  abnmlaiit,  inoder 
ately  Ion;;,  yellow  ])ile;  pleura-  with  bl.H^k  pile.  Abdonu-n  somewhat 
ehuigate  in  the  male,  oval  in  tin-  femaU-,  with  a  brassy  reHe(!tion,  mu(!h 
shininy;  first  seynn-nt,  except  tin-  sides,  and  the  second  in  front  and 
middle  subopaque  ;  |)ile  shoit,  not  very  abiMalant,  bla(;k.  longer  near 
the  sides;  on  the  sides  of  the  second  s(-,uinenf  lonj^er  and  yellow.  Knees 
isliylitly  redriish,  pile  of  leys  bla('k,  short  and  s])arse  on  the  tibia-;  the 
front  and  hind  tai-si  with  yolden  pubescence;  hind  femora  in  the  male 
uuich  thickened  and  bent,  with  a  row  of  short  spinous  tubercles  below: 
hind  coxae  obtusely  tuberculate  below,  and  the  hind  tibiui  abruptly  au- 
gulated;  in  the  female  the  hind  femoi;i  and  libiic  not  bent,  the  former 
swolleu,  but  the  tubercles  less  distinct  j  the  coxoe  not  at  all  tuberculate; 


111 


220 


Bl'LLETIN    \il,    UNITED    STATES    NATIONAL    MCSEUM. 


in  both  st'xes  the  ft'inorii  with  a   triiiiij;iihir  projection  below  near  ilic 
tip  and  a  e,orresj)on<lin{;one  on  the  tibia'  ntMi'  ilie  base.    Winj^s  hyabm,'. 
Willi  brownish  eUnids  ak)ng  the  veins,  ;iii(l  a  dark  s|)()t  lu'ar  the  ti]i  o*' 
.the  auxibary  vein. 

Two  speeiinens  (H.  K.  Morrison).  This  speeies  must  be  albed  to 
Brachyimljjiis  chri/sitisoi Eiiroite,  and  forms  acouuectiouwith  that  jjeiius. 

Crioprora  alopex. 

Pocota  alopex  Osten  Saokon,  West.  Dijit.,  338. 
Crioprora  alopex  Oaten  Siickeii,  Cat.  Dipt.,  lJ.")l,  note  '241. 

ITahitat.—CaWt'oruvA  (().  S.). 

"  S.  Leiifrth  10  to  ll""™.  AnteniiiB  brown,  first  joint  bback,  arista 
nifous ;  head  bbick,  shiniti};  ;  front  ratlier  broad,  beset  with  yeUovv  pile, 
Thoracic  dorsum  beset  with  dense  yellowish  rufous  i)ile,  which  nearly 
conceals  the  shining  black,  sub-metallic  jirouiid  color;  ])leurjB  black. 
with  black  pile;  scutellnm  black,  with  a  purplish  retlection  and  long 
black  iiile  alonjr  the  edge ;  halteres  brownish.  Abdomen  black,  siiiniuff. 
beset  with  black  i)ile  and  some  scattered  jiale  yellow  pile  toward  the 
tip.  Lejjs  black,  knees  and  base  of  tibiiu  of  tlie  two  anterior  pairs 
pale  brownish  ;  hind  femora  somewhat  incrassate  and  beset  with  a  turt 
of  yellow  iiairs  above;  hind  tibia)  rather  stout.  Wings  tinged  witii 
reddish-brown  anteriorly,  especially  along  the  vebis,  the  inside  of  tlie 
cells  being  paler;  posterior  portion  sub  hyaline,  slightly  brownish  along 
the  veins." — Osten  Sacken,  1.  c. 


POCOTA.* 

Poc4)ta  St.,  Fargoan  and  Sovvitle,  Eiicycl.  Meth.,  x,  518,  1825. 
liainjmijia  Ejrger,  Verb.  Z.  H.  Ges.,  xiv,  71. 
Hadroini/ia  Williston,  Can.  Ent.,  xiv,  78. 

Large  s])ecies,  thickly  pilose;  black  or  metaHic  black,  abdomen  without 
spots  or  binds.  Head  somewhat  llattened.  Eyes  bare.  Antenna^  sit- 
uated near  the  middle  of  the  head  in  profile,  short,  the  third  joint  ob 
liquely  oval.  Face  short,  the  oral  margin  in  front  not  lower  than  the 
lower  border  of  the  eye,  gently  or  deeply  concave  from  the  antenna'  to 
the  tip,  the  tip  standing  forward  as  lar  as  the  base  of  the  anteinue.  ob- 
Ii<iuely  truncate  below  ;  tln^  cheeks  rather  narrow,  gently  convex  below. 
and  nearly  at  right  angles  to  the  occiput.  Thorax  and  scutellum  large 
and  bi'oi  (I.  Abdomen  short,  br(»ader  than  the  thorax.  Legs  stout,  the 
hind  '"-mora  only  .slightly  thickened,  thickly  beset  on  the  under  side  with 
short  bristly  hairs.  Marginal  cell  of  wing  oi)en ;  third  vein  neatly 
straight,  anterior  cross-vein  oblicpie,  beyond  middle  of  discal  cell.  Tyitc 
of  genus  F.  apiforniiN  (Schranli)  Scliiii. 

Our  single  known  species  must  be  nearly  allied  to  P.  apijormis.  The 
face  is  ai>parently  a  little  more  deeply  concave  in  prolile  and  the  insect 
is  larger. 

*  JIoKoi,  Bheep  wool. 


Pocota  gr 
lladi 
lirav 

llabita 

6.  Le 
black,  de 
low  pile, 
blackish 
whitish  I 
obscurel.'s 
of  the  wi 
Posterioi 
abdomen 
longer  y» 
retldish  ; 
hind  tart 
reddish. 

One  sp 


Ihac 

Dark 

moderate 
(ioinen  n 
iiMially  111 
Europe. 

l.-lliiul  1 

band: 

Hind 

2— l.i'jis  w 

l.t'ijs  in 

3.— Second 

liaiid 

Alid()in( 

4— Ddi'sni 

Ddismi 

Brachypa] 
llntoi 

Ihthita 
$,  9. 
iibsciirel.N 
iroiital  ti' 
mule  bro;: 
Antenna) 


,11 


SYNOPSIS   OF    NORTH    AMERICAN    SYRPHIDiE. 


221 


Pocota  grandis  (Plate,  X,  figs.  7,  7a.) 

lladromii'ui  iirtiiidis  Willistoii,  Cau.  Eiit.,  xiv,  79. 
liravhjipalpuH  Morr'mml  Higot,  Aiinales  Soc.  Ent.  for  1883,355. 

llabitat. — Washington  Territory ! 

i  .  Length,  L*2  to  L'.'V'"",  of  wiufjs  IT""",  lini.ssy-hlack,  sliiniufj.  Front 
black,  (ItMisely  clotlied  with  ycMowish-fjray  poUon,  and  with  short  yel- 
low pile,  intermixed  with  Idack  at  tiie  vertex.  Antennie  brownish-red. 
blackish  towaid  the  ba.se.  Face  whitish-yellow,  thickly  (M)vered  with 
whitish  pollen  ;  in  the  middle  below  the  anteiiiiie  the  {ground  color  is 
obscurely  blackish;  cheeks  black,  shining;'.  Dorsum  (»ftiiorax  in  front 
of  the  wiiijjs,  and  the  pleura*,  densely  clothed  with  short  yellow  pile. 
Posterior  half  of  thorax,  the  scntellnm  and  the  first  three  se;;-ments  of 
abdomen  with  thick,  short,  black  i)ile;  fourth  and  liftli  se<>-metits  with 
loiigei' yellow  pile.  Lef^s  black,  with  short  black  pile;  knees  slij>htly 
reildish  ;  front  tibia?  in  front,  the  tip  of  hind  tibia',  and  the  front  and 
hind  tarsi  yellowish-red,  with  short,  thick,  j-olden  pile ;  middle  tarsi 
reddish.     Wings  hyaline,  costal  and  sub-costal  cells  yellowish. 

One  specimen. 

BRACHYPALPUS.* 

BtM'hiii>ali>HK  MiUMimut,  Mist.  Nat.  Dipt.,  i,  .Vj:!,  18:i4. 

Dark  colored  .species,  the  body  wholly  without  yellow   markings, 
moderately  or  thickly  pilose.     Head  and  wings  as  in  Pocota,  but  the  ab 
ilonieii  narrower  than  the  thorax,  elongate ;   hind   femora   somewhat, 
usually  much,  thickened  and  elongate.     Type  of  genus,  />'.  rarus  Panzer. 
Europe. 

'I"AI5T>E  OF  SPECIES. 

l.-IIiii(l  loiiiora  with  sliort   liri.stlcs  IicIdw  ;  abilnnitMi  with  lirilliaiit  iiit'tallii- cross- 

\)ii\H\n(CaHil)roliola) 4 

Hind  I'ciiKiii)  iii>t  with  )iristl('M  liflow ;  ahdonicn  uiiitoniily  hlacU 2 

2.— l.i'^H  wholly  hiacU Rileyi 

l,i'.u;s  ill  ])ai't  yellow 3 

3— Second  and  third  abdominal  scL^uiciits  each  with  a  hroad,  posterior,  opaiiue  cnts^- 

liaiid;  smaller  species parvus 

Alidomen  not  with  sn<'h  <'ross-liiiiids;  larj^er  siiecie.s frontosiis 

4.— lliirsum  ol' thorax.  y(dl()w  pilose sorosis 

Dorsnni  eliieliy  hlaek  pilose pulcher 

Brachypalpus  frontosiis.     (Plati'  X,  ti,:;.  8.) 

Urdi'liiiiKtljiitu  j'roitlDsni  I^oew,  Centiir.,  \',  .")(). 

Hdliitni. — District  of  Columbin,  Pennsylvaniii ! 

^  ,  9  .  Length,  10  to  12"'"'.  IJlacU,  shining,  clothed  with  whiti.sh,  or 
iil)s('urely  yellowish-white  pile.  lOyes  of  male  very  briefly  contiutious, 
iioiital  triangle  coven^d  with  yellowish-whitish  i)olIen  ;  front  in  the  fe- 
male broa(.',  with  a  median  white  pollinose  fascia ;  obsoh^te  in  tin?  middle. 
Antenna}  reddish  brown  or  blackish  ;  first  two  Joints  a  little  elongate. 

fifjcxx^i,  short;  ]»ali»U8. 


V 


'I 


I 


■' 


Ot>-) 


nrM.KTiN  ;ii,   united  states  national  mtseum. 


:  li 


.*i'\ 


'*t' 


sonu'f  iiiK'sdarli  red,  tliird  joint  obliquely  oval;  arista  yellowi.sli-hrowiii.sii, 
Fa(!('  retreating  to  nearly  as  low  a>s  the  bottom  of  the  eyes,  the  epistoiim 
lyrodneed,  in  profile  deeply  concave;  broadly  shininfj  acaoss  tlie  middle, 
above,  for  the  whole  widtii,and  for  a  short  distance  below  tiie  antenna., 
whitish  ])ollinose ;  below,  an  oblique  stripe  runs  from  the  eye  to  the  ornl 
mar<;in  in  front.  Dersum  of  thorax"  and  scutelhim  metallic  liliick. 
shininj;,  obscured  by  the  pile,  the  former  with  four  sub-obsolete  coppen 
purple  strii)es.  AbdonuMi  black,  oi-  brownish  black,  s»ib-opa<|ue  in  the 
male  on  the  posterior  part  of  Ihi;  .second  and  third  sejiinents;  pile 
wholly  lijiht  colored.  Lejis  black,  extreme  tip  of  femora,  and  narrow 
base  of  tibiie,  reddish  yellow,  tlu^  intermediate  til»ia'  more  leddisji 
fhroufihout,  ex<!ept  a  dark  rin<f ;  front  and  middle  tar.-^i  rechlish  on  ilic 
basal  joints ;  hind  femora  thickened,  mu(;h  so  in  the  male,  and  on  the 
outei'  part  below  with  an  an<;ular  })r(»jection ;  posterioi'  tibia'  ari-nated, 
more  so  in  the  nude,  ami  with  a  tooth  like  i»rocesH  on  the  inner  side 
al>ove,  corres])ondiii{;-  to  the  femoral  projection,  ami  a  stout  sj)urat  tlic 
lower  end,  both  of  which  are  wanting"  in  the  female.  Ilalteres  and 
tejiuhe  lij^ht  yellow.  Winjis  nearly  hyaline,  near  the  end  somewliat 
iidiiscated;  transverse  veins  lijjhtly  clouded;  stifi'ma  luteous. 

Two  male  spectimens  from   Pennsylvania  (Eugene  Keen),  and  a  tenc 
ral  female  bred  bv  Professoi-  IJilev. 


ii.  1.1 


Brachypalpus  Rileyi,  u.  sp. 

JInhitdt. — North  Carolina ! 

9.  Lenj>th,  7""".  Dlack.  Anteniiie  blackish-brown,  third  joint 
transversely  oval;  arista,  yellow.  Face  and  posterior  orbits  jrray  poll!- 
ncKse;  (dM'eks  sliininj;'  black.  Lower  i)art  of  the  front  shininj:;  across 
the  niiddhi  broadly  pollinose;  black  |)il()se  above.  Dorsum  of  ilioiax 
black,  sparstdy  ])ilose,  in  the  middle  with  two  narrow  <)j>a(pie  stripes; 
on  eacdi  side  a,  similar,  abbreviated,  and  intei'ru|)ted  one.  Abdoinci; 
oval,  i)ri;;ht  shininj,^  black,  sparsely  li<;ht  pilose;  the  first  sejjment,  llir 
st'cond  sejj;ment,  except  a  lai-j^e  triangular  shining  si)ot  on  each  side, 
narrowly  separated  at  their  ti|)s,  and  a  jjosterior  band  on  the  thir<l  scu 
meiil.  (»pa<pM'  bl:;:k.  Legs  wholly  black,  with  sj)ai'se  light  i)ile;  liiiid 
femora  thi(dv"ned.  Wings  hyaline,  stigma  luteous,  a  narrow  Itrown 
cloud  on  l)ase  of  second  vein,  anterior  cross-vein,  and  the  ))ennltinia!(' 
section  (tf  fi(tl)  vein. 

One  specimen.  North  Carolina  (National  Museum,  rrofessin-  JJiley's 
collecfion). 

Biachypalpua  parvus,  n.  Hp. 

Ilabiliif.—iUAnnnW. 

^.  licngtli,  """".  Head  i\fi\n  B.  Rih'ui ;  tht»  eyes  narrowly  separated 
lielow  ilie  (icelli.  Doisum  of  thorax  brassy  black,  shining,  with  two 
narrow  opaque  strii)es.  abbreviate«l  behind,  an«l  an  outer  abbreviated 
stripe  on  each  side,  interiupted  at  the  suture.  I'ile  only  moderately 
abundant,  light  yellow.    Abdomen  shining  metallic  bronze  black:  tin 


JM. 

i-browiiisli. 

tlic  iiiiddlc. 
«'  aiitciuiu'. 

'  to  tllCOlill 

iillic  l.liick. 

t<'('.<)|»])(MV 

ii<|U('  ill  tlif 
iM'iits;  pile 
md  narrow 
»i«*  MMldish 
ilisli  on  til,. 
iixl  on  rlic 
V  iirciiiited, 
'  i liner  side 

spill- ilt  tllf, 

iltcrcs  iiiid 
soiiu'wliat 
s. 
md  a  tenc 


SYNOPSIS    OF    NORTH    AMKKICAX    SYllIMIID^. 


22.  V 


;liir(l  JDJiit 
jrr'a.y  polli- 
iiijl;';  across 

of    lllOlilX 

m'  stripes; 

\l»(loiiieii 
:>nient',  tlir 

oaeli  side, 
'  third  se;;- 
])i](>;  liiiiii 

()\v  lirowii 
I'iniltiiiiiiic 

ior  JiilevV 


SO]  »a  rated 
with  two 
)l)reviated 
lodcrately 
)Iack :  flit 


second  and  third  scjjiiients  each  wiiii  a  hroad  posterior  opa(ine  bhick 
band,  with  a  sleiKh'r  me<lian  anterior  extension  to  the  front  niarfiin. 
Pile  liftlit  .velh)\v,  hn\<<;  on  the  si(h's.  1a'<;s  bhick  ;  knees  and  basal  Joints 
of  the  tarsi  yellow;  hind  femora  inneh  thiitkened,  not  arcuate;  hind 
libiai  arcuate,  c()iisi(h>rab!y  sliorter  than  the  femora.  Wings  nearly 
livaline,  with  brownish  chaids  on  the  middle  cross-veins. 

Une  specimen,  Colorado  (National  Museum,  Professor  IJiley's  collec- 
tion). 

It  is  very  possible  that  this  is  the  male  of  Ji.  L'ihiji,  but  tlie  metallic 
colorinj;  of  the  body  and  the  color  of  the  legs  make  it  doubtful. 

Brachypalpus  sorosis,  ii.  sp. 

IldhHat. — Georgia! 

$.  Length,  12""".  Frontal  triangle  and  face  yellow.  Antenine 
yellowish  red.  Cheeks  black.  Dorsum  of  thorax  shining  metallic 
hioMze,  with  erect,  rather  abundant  light  yellow  jdle.  Humeri  ycdlow- 
isli  red.  Pleura.'  black,  in  the  middle  with  light  yellow  pile.  Scut<dliim 
like  dorsum  of  thorax.  Abdomen  on  the  dorsum  shining  Tn«'tallic 
bronze,  with  opaque  black  iToss-bands;  first  segment  bla(d<  in  front, 
the  second  segment  with  a  broad  band  in  front,  and  another,  a<;resceiitric 
line  (th<i  bpoadi'st)  behind;  third  segnu'iit  with  a  slender  one  on  tin-  an 
tcrioi-  margin,  behind  the  middle  with  a  narrow  anteiioily  arcuate  one; 
[lile  erect,  rather  abundant,  light  yellow.  Legs,  including  the  trochaii 
li'i's,  reddish  yellow,  with  nearly  white  pile;  tip  of  tarsi  blackish.  VViiij;s 
brown  in  front,  subhyaline  behind. 

t  lie  specimen  in  National  Museum  (Professor  Riley's  e<dlectioii)» 
labelled  "S.  (iecugia,  Morrison.''  The  species  very  stiongly  resembles 
('.piik'hcr,  but  it  seems  distinct  in  the  pile  of  the  thorax,  and  the  color 
of  the  legs  and  wings. 

Brachypalpus  pulcher.     (I'liiti^  X,fi<;M.  y.S>a.) 

llraclijiiMlpiiH  piilclicr  Willi.stm),  Can.  Eiit.,  xiv,  71). 

Calliprohola  ivrva  l!J;^<)t,  Amiiili's  Soc.  Eiit.  dti  l^'rancc,  IHrtH,  j).  W'fi. 

Jlohifdf. — (Jregoii,  Washington  Territory! 

(5,9.  liengMi,  IL'  to  1(5"'"'.  Face  yellow,  with  bhudv  <dieeks,  and  witli 
or  without  bhickish  or  brown  median  stripe,  shining  in  the  middle,  pol 
liiio.se  on  the  sides,  l-'rontal  triangle  of  the  male  ytdlow  or  Inownish  : 
Iroiit  in  female  blatdi,  rather  narrow,  a  little  broader  iMdow,  yellowish 
|i(illiiio.se  <ui  the  sides  ;  piles  short,  fuscous.  .\nteiiii;e  yellowish  brown 
111  Idackish,  third  Joint  of  a  lighter  color  near  the  liase  below.  Doisiim 
III' thorax  and  scutellum  bhu-k.  with  a  bluish  or  partly  metallic;  retlee 
;iiiii,  or,  in  better  preserved  speciiiiens.  a  iiietallic  lirotize  ;  liunit  ri  and 
.1  slender  iiiterrnpled  band  on  ilie  siitiiic  yellowish  whitish  polliiiosc: 
die  pile  ol  the  dorsum  more  Idackish,  on  postalar  callosities,  sciittdlmn 
and  pleura',  yellow.  Abdoineiiof  a  luilliant  goldenor  l>lnish-bronze,  with 
short  golden  pile  and  opacpie  black  markings  as  follows:  first  segment, 
except  the  sides,  in  the  female,  in  the  male  the  hind  border  also  shining; 


'   1 


i  i  I 


U 


224 


BULLETIN    31,    U.VITED    STATES    NATIONAL    MUSEUM. 


im 


?■• 


\ .  i 


second  se^mt'iitoii  the  front  })art,iin<l  ;i  haiul  be.vond  tlie  middle  of  iibout 
the  same  width,  somewhat  aiifjnhited  in  fro'.it  in  the  middle;  third  n^^. 
ment  similar,  except  the  front  border  may  be  (|nite  narrow  and  the 
eross-band  sub  interruj)ted  ;  fourth  se<jnient  in  male  wholly  metallic, 
eoncealinjjf  the  hy)Kt|)y,iiium,in  the  female  with  a  very  narrow  IVont  hor 
<ler  and  narrow  interrupted  eross-band  ;  the  black  bands  are  affennati'd 
on  the  sides,  not  (|uite  leaehing;  the  lateral  margins.  Le^rs  yellow; 
f^>mora  rathe'-  stout,  the  h  ijid  pair  moderately  thi(  kened  ;  front  and  mid. 
■die  ])airs  mostly  brownish  or  black,  sometimes  j)revailin{j:  yellow,  black 
ish  above,  hind  femora  varyinfjf  from  a  blackish  rin},'  near  the  base  to 
almost  wholly  bhu^k,  below  with  short  black  bristly  hairs  near  the  end: 
last  three  joints  of  the  tarsi  black.  Winjjs  smoky  hyaline,  stigma  ye! 
lowish  brown. 

Twelve  specimens,  Mount  IJood,  Oregon,  and  Wasbingtou  Territory 
{H.  K.  Morrison,  Professor  Conistock). 


!     I 


>i 


XYLOTA.* 

Xylota  MeifjtMi,  Syst.  Besolir.  iii,  211,  l&ir>. 
[ItUophUuii  Mci^fii,  Illifrer's  Maj;.,  ii,  '27:5,  IrtO:}, 
Micraploma  \\  rstwood.  Iiitrodiic'tioii  to  Class,  of  Insects,  i. 

Medium  to  large  sized  species,  slender,  the  abdomen  more  or  less  rod. 
yellow,  oi'  metallic.  Head  hemispherical.  Antennae  situated  on  ii 
more  or  less  i)rominent  eoni(!al  jtrojection,  lirst  two  Joints  short,  tlic 
Ihird  rather  large,  oval  or  round,  with  a  basal,  bare  arista.  Face  in 
] »roti I e  concave,  without  tubercle,  transveisely  arched  or  rarely  cariiiate, 
ojal  margin  in  front  i)roj('cting,  but  not  extending  as  far  forward  ;is 
the  base  of  the  aiiteiiiiie.  Eyes  bare,  contiguous  in  the  male;  front  in 
lemnle  iiarrowe<l  abov<>.  Tliorax  large;  scutellum  thinne<l  on  its  border, 
of  th('(;olor  of  the  thoracic  dorsum.  Abdomen  not  wider  than  the  thorax, 
twice  (U'  thrice  as  long,  sonunvhat  ilartened  and  usually  with  nciiiiv 
]»arallel  sides.  Legs  stout;  the  hind  femora  elongated  and  more  or  l(',><s 
thickened,  below  with  a  row  of  short  spine-^,  not  arcuated;  hind  coxic 
in  the  male  Iretiueiitly  with  a  spinous  tubercle  below;  liind  til)i;e  aiciiiite, 
often  teri;iiiiatiiig  in  a  spur.  Wings  when  at  lest  usually  folded  iivci 
^nv\\  other;  iiiiirginal  ceil  open,  third  vein  straight  or  gently  eiirvcd, 
anterior  cross  vein  at  or  beyond  the  middle  of  the  discal  cell,  more  oi 
less  oblique. 

TAIJLE  OF  SPECIES. 

1.  — lii';;.s  w  liolly  Idiicli :  liiiid  IV'iiior.'i  imicti  lliicki'iioil 2 

Ii('fj;s  not  wliolly  black ■     ....    3 

2.— Wholly  l)lncU;  wings  hliick chalybea 

Abdoini'ii  cliii'fly  ifd;  the  second  .seij;ineiit  with  a  basalblack  triangle;  wiiij:- 
iiearly  hyaline pigra 

*^vXov,  wood. 


SYNOPSIS    OF    NOHTH    AMERICAN    SYKI'lIIDiE.  22f> 

3.— Sicdiid  iiiiil  1  liird  ivli(liiriiiii:il  sc;riiii'iits  (at   least )  red 4 

S<'('oiiil  and  lliird  ,sc;4im!nts  wliolly  Mack,  or  Willi  ytdlow  spots 7 

4  —  Vlidniiii'ii  wliDJIy  ird  cx.'ciir  flic  I'lrst  sc,:^'iiiciit ;  Iiiiid  (  oxM'  of  I  lie  lualo  without  :i 
tootli  hidow bicolor 

Ahdoiiicii  i'xei'|)t  flic  tii>f  si'j;!iiciit,  not  w'lolly  red        5 

5.-  Second  alxloiiiiiial  sc^^iiiciit  with  a  hasal  Idack  friaiic;lc;  fhc'J-l  s<'i.<-iiicnf s  \.  itji 
narrow  lateral  lilack  iiiaririns marginalis 

Alidonu  n  not  m>  niaiked 6 

6. —  Hind  cox;e  III  male  with  a  siMir  l)elow flavitibia 

Hind  eoAic  of 'iia'e  w  it  lioiit  a  !-'i)Mr  I'clow n   tlia 

7.— I'ronf   and     niiddle    h;;s  ai:d   a    Iarj;-e   \>r\\  of  flic    hind   femora  yellow ;    laruc 

S|)ecies 8 

I'ronr  le;;s  In  lar,L;c' ]iait  Mack 9 

8- (Ox.e  hlack curvipes 

Coxa'  yellow vec  :rs 

9.-- Al)do;iien  loiitj;,  blender,  witli  i  wo  yellow  spots  on   the  second  scLtnicnl    .... 

aiigvistiventri.s 

Alxloinen  not  nnnsnally  r-lendcr ...     10 

10.  —  Alidonicn  will:  two  pairs  o|  yellow  spots 12 

.Miiioiiieii  wh(dly  black 11 

11.— Third  joint  of  iinfenme  Imt  little  l(ini;cr  than  Kroad      .     .     Anthreas,  obscnra 

riiird  Joint  Iar.,e.  innch  loii'^er  than  hroad elong^ta 

12.— I  lind  I'einora  nnnli  Ihickciied,  .sniallci' sjiccies       13 

Hind  femora  i hratcly  thickened 14 

13.-~.vrisla  wholly  hlack nemorum 

Arista  ytdlow  j>t  the  base fraudulo.sa 

14.~-Fonrlh  alxloininal    scj;iiieiit  brilliant   bronze;    third   l()nj;itii(liual  vein    ^enrly 

ciirv(>(l      ,     .  analis 

I'^onrth  alidoininal  seij,iiicnt  black  ;  third  vein  quite  straight     .     .      .     ejunciQu 

For  other  .species,  see  descriptions. 

Xylota  (?)  tuberaiiB,  n.  Hp. 

Habit(it.—  l\'\i\H  ! 

6.  Lenstli,i>  to  10""".  Sliiiiiiij.i-  black.  Face  thickly  gray  pollinose, 
ix('e])t  on  the  tubercle  ;  occi])ut  and  i)Osterior  orbitsdenselypollino.se. 
Tliinl  joint  ofantennte  not  large,  orbicular;  thorax  shinino-,  thinly  and 
slinit  yellowish  and  blaclc  pilose.  xVbiloineu  wholly  shininj^  bhick, 
iiiiiily  bare.  Leos  bla(;k,  all  tiie  tarsi,  excei»;"  the  last  two  joints,  yellow- 
ish white.  Hind  femora  thickened  and  elonoate,  riot  arcuate.  Coxie 
uitliout  si)nrs.  Winos  lu'arly  hyaline  toward  the  base,  inliLscated  on 
outer  i)art.     Hti.yiiiii  luteons. 

One  specimen,  Texas,  National  ^Museum. 

Tlie  present  species  cannot  i)roperly  be  plticed  in  this  genus.  The 
iienration  is  tiie  same,  except  that  the  cross-vein  is  not  at  all  obliipie. 
Tlic  head  in  o(.iu'raI  structure  is  the  same,  but  the  lace  is  very  distin(!tly 
'iiliciculiite.  In  profile  it  is  stroiioly  concave  below  the  antenna!,  then 
tiiriDs  it  small  but  ])romiiient  tubercle  ouposite  tiie  lower  Itorder  of  the 
lycs.  and  the  iace  is  more  ])ro(hiced  thai,  in  Xylota.  The  cheeks  jire 
'noiider  and  form  tin  obtuse  angle  with  the  plane  of  the  occiput.  The 
iibdomeu  is  elongate,  but  is  iiuudi  stouter  and  broader  tlum  in  most 


It' 


'i ' 


■S    ! 


Uf 


U    I   i\ 


2 -2  (J 


iu:i.i.i:ri.\  ;si,   imtki)  states  national  mu.skim. 


i 


li»'^ 


P' 


X.vlotiv,.     It  is  as  hroiul  as  tlio  thorax,  tlio  second   and  third  soj^mcnts 
lie, Illy  paralit'l  on  tlic  sides. 

I  suspect  tlial  tlie  female  ab(h)nien  may  be  broadei-,  and  tlie  face 
without  a  tubercle;  if  so  there  is  evidently  a  relationshi])  with  MyiolepUh 

Xylota  marginalis,  ii.  sp. 

.'  Sijlold  lAho  Wiilki'i',  liist,  ('t(;.,  iii,  U^^). 

llahilui. — White  Mountains  ! 

?.  lienjilh,  10""'.  Front  broad,  only  fiently  narrowed  above,  shiniiij,' 
black,  pollinose  on  each  side,  broadly  nearly  the  middle;  pile  white, 
somewhat  dusky  near  tlie  vertex.  Antenna'  yellowisli  red,  the  arista 
wholly  yellow;  the  flist  Joint  black,  third  joint  rounded,  a  little  lon-jcr 
than  broad.  Face  shininj;'  black,  liji'htly  whitish  dusted  on  each  side  he- 
low  the  antenna'.  Dorsnm  of  thoiax  shininj;'  bronze  black,  with  very 
short,  obscaire  whitish  jtile;  in  the  mid<lle  with  two  slender  darker  strii)es 
separated  by  a  lineai'  si)ace.  Pleura'  shininjj  black;  tejiuhe  white: 
halteres  very  lij-iit  yellow.  Abdomen  brifjhtred;  first  sej;inent,  except 
the  hin  I  anj-les,  a  slender  triangle  at  the  base  of  the  second,  extendiiij,' 
t(»  beyond  the  middle,  and  the  nariow  lateral  maryins  of  the  second, 
third,  fourth,  and  fifth  sejj;ments,  deep  shiuiu};'  black;  the  short  ]>iie 
wholly  white.  All  the  femora  except  their  immediate  tip,  and  the 
broad  distal  end  of  the  hind  tibiic,  black  ;  front  and  middle  tibii«  yellow, 
with  the  distal  ends  biown,  and  a  less  distinct  brownish  v'uv^  before  the 
middle;  hind  tibia',  except  the  distal  ])art,  red,  with  a  brown  riny  on 
basal  third;  first  three  Joints  of  all  the  tarsi  light  yellow,  tlie  terminiil 
joints  blackish  ;  hind  femora  much  thickened,  hind  coxie  without  spurs, 
hind  tibiit!  with  a  terminal  sjiur.  \Vin;j:s  nearly  hyaline,  distinctly 
tinj^ed  with  yellowish  alony  the  veins,  stij4ina  opaque  yellow;  the  biise 
of  the  nmrj'inal  cell,  the  anterior  cross-vein,  and  the  cross-veins  at  base 
•of  discal  ami  fourth  posterior  cells,  conspicuously  clouded  with  brown, 

One  specimen,  near  IVIount  Washiiifjiton,  August  1.  This  agrees  toler- 
ably well  with  Walker's  description  of  A'.  Z//>o,  except  that  the  anteiinre 
are  not  "black  with  the  first  joint  ferruginous"  and  his  description  of 
the  abdomen  will  not  apply,  viz,  "dark  red,  slightly  pitchy  on  the  sides 
and  hind  borders  of  the  segments." 

Xylota  analis,  ii.  tsp. 

JInhifut. — California,  New  IMexico  ! 

^,5.  Length,  11  to  J2""".  P^'ront  of  female  considerably  narrowed 
above,  shining  I)lack,  tow;ird  the  vertex  metallic,  across  the  iiinhlli' 
l»roadIy  yellowisli  gray  jiollinosi'  and  siniilaily  pilose.  Aiiteiina'  blai'k. 
vlie  third  joint  browii,  with  moic  or  h'ss  reddish,  lounded,  not  lonuei' 
lliaii  Inoad,  arista  wholly  liilcons.  Vncv  black,  moderately  tliirkly 
whiii'  pollinose  below  the  antenna';  frontal  triangle  thickly  white  polli- 
■  lose  excei»t  a  lunate  sjjot  abo\»'  ilie  aiiteiiiia'.  Dorsum  of  tlmrax 
Iti'onze  black,  more  iiutaliie  in  Iroiit,  a  sericeous  spot  to  the  inner  side 
•ut  each  iHimcrus;  pile  very  short,  in   front  yellow,  across  the  middle 


wmmn 


ipwp 


■^^ 


tlic  face 
Uyiolcpta- 


?,  shin  ill!,' 
ile  wliitf, 
lie  arista 
tie  loiifjcr 
;li  side  he- 
wit  li  very 
Lor  stripes 
Itv  wiiiti*; 
lit,  except 
exteudiiig 
e  second, 
short  |)ii(' 
,  and  the 
iiii  yellow, 
before  tlie 
n  ring  on 
B  terminal 
Dut  spurs, 
distinctly 

tlie  base 
lis  at  base 
th  brown, 
rees  tolor- 
(  anteiinfE 
jriptioii  of 

the  sides 


narrowed 
le  iiiiddli' 
iiiv  bliii'k. 
(it  loii.uer 
y  thickly 
hitc  i>olli- 
i)t'  thorax 
inner  side 
ic  middle 


SYNOPSIS    01'    NORTH    A.MHKICAN    SYUiMUU.K 


227 


hlackisli.  Abdomen:  lirst  sejjinent  l)ronze  black,  sliiiiiMg;  ronrtli  seg- 
ment and  the  following  very  brilliant  golden  bronze;  second  segment 
()pa(|iie  black,  on  each  side  with  a  large  triangle  shining  yellow,  its 
iiiiler  lK)rdci'  bronze;  third  segment  similar,  but  the  l)laek  not  as  extcui- 
>ive  on  the  front  margin  and  the  yellow  not  tilling  ont  the  whole  of  the 
triangle,  which  is  elsewhere  shining  bronze  like  th«'  fourth  segment;  pile 
yellow,  except  m  the  opaque  black  portions,  where  it  is  black.  Legs 
black;  the  imi'iediate  tip  of  all  the  femora,  tlu>  i).ise  of  all  the  tibiie, 
and  the  rather  broad  ti])  of  the  front  and  middle  tibia',  the  narrow  tip 
(if  the  hind  tibi;e,  and  the  tirst  two  joints  of  ail  the  tarsi,  reddish  yellow; 
liind  femora  nuxlerately  thickened,  hind  eoxie  with  a  sU-nder  sharp  spur 
ill  the  male,  hind  tibia;  without  a  si)ur  at  the  tip;  pile  of  legs  white. 
Wings  nearly  hyaline,  stigma  brownish;  thirJl  longitudinal  vein  beyond 
the  cross  vein  gently  but  distinctly  curved  backward. 
One  male,  California  (Baron),  and  two  females,  New  Mexico  (Gaumer). 

Xylota  pigra.     (Plate  XI,  ljf;s.  7,7rt.) 

Siirijhiin  pUjer  I'lilirieiiis,  Sy.st.  Eiitoin.,  iv,  '^'.T),  Q',\,  1794. 

Mdfuia  ])i()ra  Fnliricius,  Syst.  Anil.,  llt'J,  Ki;  Fallen,  Syrpli.,   ii,  7  var.  B;  La- 

treiile,  Gen.  Crnst.,  iv,  ',VM. 
Xjilola  piijra  Meij^cii,  Sy.st.  PxHehv.,  iii,  'i-il,  14;  Zotterstedt,  Dipt.  Scand.,  ii, 

87f,  12;  viii,  'M'M;  Loew.  Ainer.  .lour.  Sci.,  xxxvii,  :?17. 
Milenia  hamatodi'n  FaliriciuN,  Syst.  Anil..  11):!,  i21. 
Xjiloia  lurmatodcn  Say,  Anier.  Kjit.,  i,  ]il.   vili;  Conipl.  \Vr.,  i,  Ki;  Wiedemann, 

AnsH.  Zw.  Ins.,  ii,  '.l!>,  :<;  Miie(|iiait,  Dipt.  Kx<it.,ii,  2,  7'A;  pi.  xiii,  tij;.  4. 
Xiilola  cruxfiipin  Walillierj;,  Acta  llcilni.,  iHlid,  I'),  7. 
.'  Xi/lola  ruhhi-iiitujaiilcr  V>\\s.»\,  Ann.  Soc.  Ent.  Fr.,  1884,  ."i4:!  (Tt'iicral '). 

Hdhifat. — Atlantic  and  Pacific  States,  Europe ! 

3,9.  Length,  11  to  12""".  Antennal  jirocess  prominent,  below  the 
uitciime  receding  to  beyond  the  middle,  then  directed  downward  and 
ionvard.  Face  black,  thinly  clothed  with  whitish  pollen,  shining  on 
the  cheeks.  On  the  frontal  triangle,  except  .just  above  the  antenme, 
IKillinose.  Front  in  female  shining,  a  narrow,  lightly  poUinose  band 
iiioss  the  middle,  AnteniKB  black,  third  j<»iiit  brownish  black.  Thorax 
hlaek,  but  little  shining,  linely  roughened,  with  a  piuiilish  or  bronze 
letlection,  nearly  bare,  the  pile  very  short,  black,  nlor(^  or  less  white  in 
lidiit;  on  the  inner  side  of  the  humeri  a  larg(^  pollinose  sjiot.  Abdomen 
(lark  shining  red,  in  the  male  u.snally  more  orange-colored,  on  the  iioste- 
iiiir  segments  frequently  brownish  or  brown,  the  liypo])ygium  i)iceous; 
liisl  .segment,  exctejit  the  small  hind  angles,  .shining  black;  the  .second 
vitli  a  black  triangle  in  front,  its  tip  reaching  to  or  beyond  the  miihlle 
il  the  segment.  Legs  black,  soiiu>times  more  Iwownish:  tarsi  and 
knees  a  little  lighter  colored  ;  hind  li'iiiora  much  thickened,  in  the  male 
a  little  more  .so  than  in  the  lemale,  and  with  short  siiinous  bristles  the 
whole  lengtli  below,  longer  on  oiilev  part;  hind  coxa;  of  the  male 
nmiided  below,  withont  spur  or  protiibeiance;  iiind  tibiie  in  both  .sexes 


iitli  a  spur  at  tip.     Wings  nea 


riv  hvaliiie  liehind.  in  I'roiit  and  outer 


pair  more  or  less  bhickisli  or  brownish;  .stigma  (iiiii^er, 


f    ^ 


228 


ni'LLiynx  :ii,   i'mtkd  states  national  museum. 


Two  spcciiiK'iis  from  CcMinccticiit,  one  from  (Jcoifjia,  iiiid  I wciityllvc 
from  Califoniiit,  ^Va.^llill;;toIl  Tcnitoiy,  On-j^oii,  and  (Colorado.  A  sin 
jj.c  .spccinuMi  from  I*r<)l('s.s()r  I  lik'.v's  collection  laliclcd  ''Hundreds  foinid 
uuder  ])ini'  bark  in  damp  situation,"  which  aj^rccH  witli  oltscrvatioiis 
made  by  Pcrris  (Hist,  dcs  Insects  du  Tin  maritime,  Ann.  Soc.  I'nt. 
France,  I,  .\,  ;Jl-'(i-;};)(),  pi.  I,  iijis.  llL'-li'J)  on  lOuropean  specimens. 

Xylotn  flavitibia.     (I'liilr  XI,  li,u'.  i',,) 

\ili()lii,  s|i.  nov..  Willistdii,  I'roc.  Aid.  J'liil.  Sue..,  xx,  lH>-2,  :',->7. 
.\i;l(>l'!  Jiaritihiii  liii'ii!,  Aiiii.ili's  Snr.  I'lnt,  Vv.,  H-'l,  .')l(i. 

Habitat. — Colorado! 

cJ .  Lcnj.!:tli,  IL" '".  I'aee  slioi  t,  moderately  recedin;;  and  concave, black, 
rather  thickly  <!overed  with  white  pollen.  Antennal  piocess  ratlni' 
prondiient.  Antenna'  idack,  the  third  Joint  brownisii  or  reddish  black. 
Frontal  ti'ianj;le  wiioily  thickly  wliiie  i)ollinose.  (cheeks  narrow,  cm, 
v<'X  below.  'I'iiorax  i!ietr'.Ili(;  black,  shininji',  a  scri(!eous  spot  on  I  lie 
inner  side  oi' each  iiumerus.  tiiickiy  clothed  wi'h  short  whitish  piic, 
Abdomen  <lark  shinin.i;'  red,  bniwnish  or  blackish  towards  Die  end  ;  lirst 
segment,  except  the  small  himl  anj>ies,  and  hypopyjuium  shinin.!^  ^rciu 
isli-black:  second  se<i'meiit  wholly  red.  ijcjus  black;  all  tiie  tarsi,  c.\n|ii 
tfiO  last,  two  Joints,  i-eddish  yellow;  tibiie  reddisli  yellow,  tin-  iKtni 
and,  middle  i)airs  with  a  bi'oad  brownish,  the  hind  pair  with  a  broiKi 
blackish  riny'.  beyond  the  middle.  Hind  femora  c<jnsi(U'rably  thickeucii. 
but  Iciss  so  than  in  A',  pifira  ;  the  hind  coxii3  of  male  with  a  slender  sharp 
spur  below.  \Vin;.;s  nearly  hyaline,  but  distinctly  tinyed  with  brownisii 
on  the  outer  j)art;  stij^'ma  brown. 

9.  The  lower  part  of  the  front  is  pollinose,  the  second,  third,  and 
fourth  se«.?ments  of  the  abdomen  wholly  red;  otherwi.se  as  in  the  male. 

Two  S  and  two  $  specimens. 

Xylota  iiotha,  ii.  sp. 
Habitat. — Colorado! 

$  .  Li'uixth,  11""".  Face  and  frontal  trianjfle  covered  with  gray  jtolloii. 
the  jironnd  color  wholly  black.  AnteniuB,  with  the  arista,  black.  Doisinii 
of  thorax  shininu'  metallic  bronze  jjreen  black,  a  sericeous  sj)ot  on  tlu' 
inner  side  of  each  humerus  ;  ])ile  very  short,  lipht  colored,  on  the  pleura- 
longer  and  white.  Scntelbim  like  the  thoracic  dorsum.  First  seginciir 
of  abdomen  shinins'  greenish  black,  fourth  and  hyi)oi)ygium  dee])  shin- 
ing greenish  bkudc  ;  se<'ond  and  third  segments  light  red  with  a  very 
faint,  slightly  brownish  median  stripe;  second  segment  with  a  narrow 
black  cross-band  in  front,  dilated  in  the  middle  into  a  small  trianjiU'. 
not  reaching  to  the  middle  of  the  segment,  oi)a(]ue  black  ;  the  hind 
border  of  the  second  segment  narrowly  and  faintly  brownish,  the  angles 
behin<l  blackish  ;  hind  border  of  the  third  more  distinctly  blown,  tlii' 
posterior  angles  more  broadly  brownish.  Legs  black;  base  of  ail  tiic 
tibiiB,  and  tip  of  the  front  and  middle  pairs,  and  first  three  joints  of  tlic 
front  and  middle  tarsi,  light  yellow ;  hind  tarsi  at  the  base,  and  the 


np»i 


^•" 


«^ 


8Y\oi\sis  or  NOKni  amkuican  svuriiiD.i:. 


'J  2  LI 


tihiu'  in  tlu'  niiddlf,  inoro  browiiisli;  liiiid  IV'inoia  modfM'iitcl.v  tlii('-kene»l, 
liiiid  coxii'  without  tubercle  beiow.    Wings  nearly  hyaline,  stigma  brown. 
One  speciiuien. 

Xylota  bicolor. 

Xi/lota  hirolor  Ia>v\v,  Uvi\tnv.,  v,  ^{), 

Habitat. — Pennsylvania! 

S.  Length,  1 '{""".  Face  and  front  black,  thickly  grayish  yellowish 
<liisted,  exct'pt  on  the  cliceks,  which  are  bare  and  shining.  Antennse 
l)lii('k,  tiiird  Joint  hirge,  soniewliat  reddisli  i)eiow  near  tin;  base.  Dor- 
sum of  thorax  shining  bionze  bhu-k,  clotiied  with  liglit  yi'llow,  rather 
long  pile;  pleura'  shining  bla(!k,  witii  whitisii  i)ii»'.  Al/donien:  first 
si'gnicnt  shining  black  with  whitish  i)ile,  its  jjosterioi'  angles  narrowly 
and  tiie  icniiiindei' of  the  abdomen,  including  the  liypopygiuiu,  bright 
onuige  led  with  golden  pile.  Legs  bhick,  while  pilosi';  the  bas«^  of 
iVont  iind  middle  tibia'  and  tin'  fust  two  joints  of  the  front  and  ndddle 
tarsi  light  yellow  or  white;  hind  coxie  rounded,  not  tnbercnlate,  hind 
I'cmoia  consi<lerabIy  thick<'ned,  wings  iiyaline  ;  stigma  luteous. 

Two  specimens,  liom  .Mr.  Eugene  Keen. 

Xylota  ejuncida.     (I'liitc  \I,  li<;.s.  t*,f((.) 

Xijlota  i'juncidii  Siiy,  Aiiicr.  Eiit.,  i,  j)!.  viii;  Coiiii)!.  Wr.,  i,  15;    Wiedemann, 

AnsH.  Z\v.  Ins.,  ii,  loe,  .'>. 
Xylota  lialon  Wailicr,  List,  etc.,  iii,  r.")4. 


Xtjlota  i/dO'Ir, 


ilatii  I. 


Cclltl 


Xi/liln  ninnilij'erii  lii.noi,  .\iiiiiili'.s  Soc.  lint,  Fi'.,  1H"?4,  54.5. 

H((hit((t. — Over  tin;  wln)le  United  Stiites. 

<? ,  9  .  Length,  !>  to  H»""".  I'tice  much  receding  to  considerably  below 
liie  miildle;  black,  itither  thickly  clothed  with  gray  pollen.  First  two 
joiutsofanteniiie  black, third  red  or  brownish  red, oval,  longerthan  l)road, 
tlie  arista  wholly  black.  Frontal  triangle  thickly  covered  with  grayish- 
yellowish  pollen;  front  of  female  narrow  above,  bright  shining  black, 
I'xeept  i\  nari'ow  pollinose  cross-band  below  the  middle.  Dorsum  of 
tlioiax  shining  nu'tallic  green  or  greenish  black,  a  sei  iceous  spot  at  tlu^ 
inner  side  of  each  humerus  ;  pile  of  scutellum  short,  yellow ;  on  t'le  nu'.so- 
pleune  longer,  white.  Alxlomen:  fiist,  fouitli,  and  following  segments 
.sliiuing  greenish  black;  second  and  third  opacpie  black,  with  a  broad, 
yellow,  shining,  short  yellowish  ])ilose,  intei'rnpted  cross-band;  else- 
wliei'e  the  pile  of  the  abdcmien  is  short  and  bhiek,  exeejtt  a  white  spot 
(»ii  each  side  of  the  fourth  segment;  in  the  male  the  yellow  s[)ots  are 
somewhat  similler,  iind  sometimes  |)artly  obscured.  Legs  black,  biise 
of  all  the  tibiic  ami  the  first  two.  or  more  usually  the  lirst  tliree.  Joints 
of  the  front  and  middle  tarsi  liiiitt   veilow;   the  fiont  and  middle  tibia', 


except  tiieir  has 


SI  more  veiiowisli 


iiid  tlie  iiind  lar.^i,  brownish,  l!ie  second  Joint  of  the 
1  fi'Mioni  luoderatelv  tiiiclu'iied.  less  .so  in 


!iiii( 


bind  tar 

the  female:  hind  coxte  of  (he  male   witli  a  small,  shari)  spur  below, 


i 


■"I 


s  •  'ii 


h 


' 


tiao 


Itl'I.M',TI\    31,    I'MTI'K    STATI'.S    NATION  M,    MI'SKI'M. 


Wiii;;M  nearly  Iiyaliiic,  only  i'aintly  tin.!,'«'(l  witli  hrowniKli  nii  the  oiiici 
l»ai't. 

In  all  the  eastern  ,s|)e<'iinens  thai  I  lia\e  e\ainine(l  tlie  pile  of  the  llm- 
raeie  (loisuia  is  li^ilit  enlnred;  some  of  the  westein  specimens  are  <|iiirt' 
the  same,  Imt  the  lar;:;i'i'  proportion  of  those  from  the  Paeilie  Ooast  li;ivc 
black  i»ile.  In  all  I  have  examined  about  (il'ty  specimens  from  .Abiiiic, 
New  ilampshire,  Massaehnsetts,  ('onnt'ctieiit,  Nc^w  York,  I'«'nnsyh  aiiui, 
(Janada,  (ieorjiia,  l''lorida,  Kansas,  Colorado,  Arizona,  (California,  AXasJi 
in};ton  'l'«'riitoiy,  and  Oregon. 

Xylota  subfaaciata. 

Xilhiln  fiiilij'iihr'iiilu  l.iicw,  ('('iitiir.,  vi,  'u. 

Ilohilaf.—  Vu'il  i{iver  of  the  North  (L\v.). 

J,  9.  Len;:itii,  s  to  1>"  '.  Ohseiirely  bronze  j;reen;  seciond  and  third 
se-^ment  of  the  alxhaiien  luteons,  with  a  slender  stripe  and  a  jtosterior 
cross-band  (that  on  the  second  narrow,  on  the  third  broad)  black,  lat- 
eral mar;:iiis  lilacki>li  l;roii/,e;  antenna'  wholly  i>lack,  the  arista  of  the 
same  color;  le<;\s  black  ;  baseoflhe  IVoiit  and  /iiiddle  tibia' and  tlif  first 
two  Joints  of  their  taisi  hiteoiis;  lip  of  the  hind  tibia  not  prodiiccii 
into  a  tooth,  the  an,ule  helow,  however,  rather  acute,  hind  coxa-  of  tin 
male  <lent.ite. 

Similar  to  .\',  (inttdritiKK-ulittd  |  X.  <junci<la],  bnt  the  antenna'  are  \vli()||\ 
black,  the  biteoiis  spuis  of  the  abdoiiMMi  are  larjicr  and  the  black  stiijic 
sepatatinj;  them  nxne  slender;  the  tibia;  are  more  obscurely  colonid. 
and  the  hind  i>air  have  a  less  acute  spur  at  the  tip.  The  spots  of  the 
female  abdomen  are  less  luteous,  soinetinies  in  part,  rarely  wholly,  me 
tallic.     Loew,  1.  (;.,  translation. 

Xylota  fiaudiilosa. 

Xulola  J'rtiudnliti^ti  t.oi'w,  (Jcntiir.,  v,  41. 

Jlahitat. — New  York,  New  llanipshire,  Wa.slnnfjton  Territory!,  Illi- 
nois, Wisconsin  (O.  8.). 

^,9.  Length,  7 '.  Front  of  tennd<;  somewhat  metallic  green;  frontal 

triangle  and  the  face  covered  with  <j;vny  i)ollen.  Antennsc  reddish 
brownish,  the  first  two  Joints  blackish,  the  arista  black,  but  reddish  at 
the  base.  Thorax  shining,  somewhat  metallic;  ;nreen,  witli  four  faintly 
cop])ery  dorsal  stripes  Abdomen:  the  lirst  sef;nient,  the  fourth  and 
following,  shining  metallic;  in  the  male  the  second  and  third  mostly 
opaque  black,  each  with  two  large  (]iKidrat<'  yellow  spots  (iontigiious 
with  the  lateral  margins;  in  the  female  sinalhu'  ami  separated  from  the 
margins,  '.egs  black,  somewhat  greenish;  knees,  base  of  front  and 
middle  tibiai,  first  two  or  three  joints  of  the  front  and  middle  tarsi 
light  yellow;  the  intermediati'  Joints  of  the  hind  tarsi  more  brown: 
bind  femora  strongly  hickeiied  ;  the  hind  coxa;  without  tubercle  he- 
low.     Wings  faintlv  tinged  with  blackish. 


^V,l 


SVNOr.SIS    (;l-    NOUTll    AMKKICAN    SYKl'lllD.i:. 


•2M 


'I'liis  sj)cci('.s  is  vci'v  siniiliir  to  X.  vj^imida.  'Hie  iiiisia,  liuwcvcr,  is 
ifil<lisli  :it  llic  li:iM>,  ilic  alMloiiiiii:)!  s)M)ts  ;ii'c  iiiurr  «|ii:i<lrat('  in  sli:i|i(*, 
iiiid  more  yellow;  the  Ic^^s  arc  lilarkcr.  aii<l  tin-  liiiid  H'liioia  iiiiich 
iiinic  swollen,  iiml  tlie  eo.\a'  williuiit  tiilx'icle.  Aceoiflin^  to  Loew  (1. 
c.)  "it  is  similar  to  .V.  hif'i(Nciat<i  Mei;;'.  \X.  nimi>ntin\  of  l'iiiro|)i',  but  is 
;i  IittI(^  siiiallei',  the  pile  slioitec,  aiitl  the  arista  of  flie  antenna'  is  not 
wholly  black,  but  lutcoiis  at  the  basi-." 

Xylota  nemoriiin. 

Mill  ■'ill  III  iii",-iiiii  t'iiliriciiiN,  Sy.st.  Aiill..  llt"^,  17.  • 

Aliliniii  iijiiuvii  I'lilli'ti,  Syipli.,  11,  ti. 


Xijliiin  II 


inioiiiiii 


MciH,.ii,  Svst.  il.v-clii.,  ili.  •Jli),  U  ;  Maciiiiot,  Hist.  Nat.  Dipt. 


!1.  :t:  /..•tlristi 


!iiM.   I.Mini, 


:!;   Dijit.   Sc'inil.,  ii,  r-l\, 


Si'liiiiur, 


I'aima  Aiisir.,  i.  li.Mi ;   v.   d.   \Viii)i,    I  ,  jilsclir.  vooi'    I'.iit.  \x\i,  Aiiiciik.   Dii>t., 

:!.  H,  45. 
Xijliitii  hil'iii,iialii  .Ml  i^iiii,  Sy.-^l.  licMJir.,  iii,  ,!!*,  10. 
Xi/liilil  (/lr./-/yjr,>(  /.c'tlcl'.sti'ill,    Ills.   l,ii[i|i.,  't<t,    t;    Dipt.  Scilliil..  ii.  S-O,  M. 

Uiiliitdt. —  I'Jinipc  (aiict.),  Canada  (\.  d.  \\  Mlp). 

This  sjjccics  is  ;iiveii  on  tlie  anthoiity  of  ]Mr.  v.  d.  Widp  (1.  c),  \\\\n 
ill  a  h'ttci'  to  (he  writer  says,  '•  ,V.  ninioriiin  !•'.  dill'ers  I'loiii  X./raiKhilosa 
Loew  not  only  in  the  si/c,  the  !on;;cr  pile,  and  the  arista  not  beiiij"  yel- 
low at  the  base,  but  also  in  totally  lackiiij.^'  the  ciipreoius  stripes  of  the 
thorax,  which  are  present  in  X.  ffauduUmt.  I  believe  the  specie.s  arc 
distiiiet.''     I.t'iij^th,  .S.r.""". 

Xylota  angiiativentris.     (I'liitc  XI,  li^.  0.) 

Xi/lolii  (iiiiiiiKliri'iilriH  I.ocw,  Cciitiir.,  vi,."i8. 

Ildhitdt. —  Illinois  (O.  S.),  New  York,  Peim.sylvania  ! 

^  ,  ?.   Iieii;4tii,  10  to  11' I'lontal  jirocess  very  ])roiiiimMit,  the  face 

much  recediiijj,  thickly  (tovered  with  white  pollen.  The  fiontal  triaiifjle 
])((lliiiose  like  the  face,  e.Ncept  a  bare  shining  spot  above  the  base  of  the 
antenna'.  Antenna'  brownish  black,  the  third  joint  larj;e,  oblonj; 
ovate;  the  aiista  black.  Thorax  shiniiii;',  soineu  hat  im  lallic  j^reen- 
i.sli  or  bluish  black  ;  a  .sericeous  spot  on  the  inner  side  of  each  huinerus; 

le  of  ine.sonleiiiic  white.     Abdomen  len"'  and  slender,  shiniii"' metallic 


iili 


ickish  Lireeii   or 


bl 


lie 


the  se(;oii(l  .seyinenf   with  a  slender  median 


,strii)e  and  jiosterior  pail,  dilated  in  tlie  liiiddle.  and  the  posterior  half 
of  the  third  se^'rnent,  oi)a(pie  black  ;  second  se^^inent  with  two  oblong', 
narrowly  separated,  yellow  or  liiteoiis  spots  in  the  male  ;  in  the  female 
wantinj;'.  Le^s  black;  base  of  all  the  tibia',  tip  of  front  and  middh^ 
tibia',  first  three  joints  of  front  and  middle  tarsi,  and  second  and 
third  joints  of  hind  tarsi,  whitish  .m'IIow;  hind  metatarsi  brown  or 
blackish;  hind  femora  moderately  swi)llen  ;  hind  coxa'  in  the  male  witii 
ii  tubercle  below ;  hind  tibia' not  produced  into  a  spur  at  tip,  but  ob 
tiise.  AVinj^s.  except  the  basal  third,  sli.ylitly infiiscated.  anterior  cros.>-v 
vcin  vei'y  obli(pie. 


T 


wo  mi 


des  (Auxer,  Keen),  aiul  a  I'eiiiale  of  which  the  head  is  wantinj 


w 


'  I  I 


} 


\ 


I 


i( 


i 


f'r 


■hi 


rj 


I 


I' 

I, 


ii . 


I 


I'i 


iVil 


|S  ■  "h 


f  i  t  ■■ 


')• 


KIM.KTIN    :n,    IJNITKI)    STATEH    NATIONAL    Ml'HKlIM. 


I w,  Nnii'   Uciti 


lit;    O^t.Mi   SacUfii,  IJiill.  Uuf.    Sue.  Nut. 


Xylota  ouivipes. 

A<//(W((  iiiriipt:' 

Hci.,iii,7(»;  Cut.  Dipt., -JM. 
f  Sillittii  sninn'ini  Hi;;c>t,  .Vmiali's  Soc.  Ijil.  I''r.,  \'*f*\,  p.  ."K), 

JldhHiil. — New  lliiinp.shiiv,  New  York,  MiiiiicMttii,  ('iilitorniii. ! 
3,9.  I.«'ii;'tli,  l.'*  to  111"  ".  lIciHl  hliick  witli  a  ;;l«'i'liisli  icili-irtKili ;  tin- 
Hides  of  ;ln'  IVoiif  and  lact'  willi  wliilc  pollen.  Antcima'  lii'owiii.sli  red, 
tilt'  aiista  l»it»\\ii.  Thorax  ahnvc  of  a  sliininjn'  Mack  coloi,  with  vci.v  in- 
distinct  stripes  and  .sparse  ycll(»\v  and  black  pile;  a  faint  pollinose  sjidt 
on  the  iitner  si(h'  of  the  linnieri  ;  plenne  Itlaci;,  with  vellow  uinl  l)liick 
|)ile.  .Vl»(loinen  elon;i'ated,  shitiin;;  hliu'  Idack.  Leji's  reddi.sh  yellow 
(not  inclndin;;'  the  eoxa',  except  a  reddish  .>  )ot  (»n  the  hind  trocdninteis 
Ix'hind),  the  iiind  femora  on  tlie  (li.stal  foiiith,  the  hind  tibia-  iJid  imsi 
wholly,  Idack  ;  hind  femora  mncli  swollen  anti  their  tibia-  niiicli  carved 
aad  tcrminatin;:'  in  an  obtnse  spur;  pile  of  the  femora  Ion;;  and  yelkiw 
and  .III  the  inner  .side  of  the  hind  tii)ia'  thick  and  black  ;  in  the  feinalc 
the  pile  of  the  Ie;;s  less  abundant  and  shorter.  \Vinjj;s  distinctly  tinjicd 
with  l)vown  on  the  distal  half;  sti^nina  dark  l)rouii. 

A  sin^h^  male  taken  lu-ar  the  base  of  .Mount  \Vashin;;ton,  Aii;:nst  i; 
a.  female  from  the  same  Htate  (l'\  II.  l"'all):  another  from  New  York  (Pre- 
lessor  Lintner) ;  and  others  from  Minnesota  (10.  Keen,  .Inly)  and  Cali- 
fornia. Comparison  is  yet  needed  of  Ameiiciin  and  Fairopean  speci- 
mens to  determine  the  identity  of  ours  with  A',  curripcn  I.oew. 

Biyot  in  his  desitription  of  A',  satauica  does  not  nu-ntion  tho  bhudc  on 
the  tipof  theldnd  f«'mora,  otherwise  his  description  shows  no  lm[>ortaiit 
<litferonces. 

Xylota  vecois. 

Ajllola  nrora  OstiMi  Suckcii,  Hull.  IJiitl'.  Soc.  Nat.  Sei.,  ill,  (i(t;   Cat.  Dipt.,  QTy.'. 

IIahif((t. — Whit(!  Mountains,  New  Hampshire  (O.  S.)I 

"(J,  9.  Thorax  brownish  bronze  color,  abdomen  blacic ;  le^i's,  incliul- 
in^"  the  coxa-,  ferrujiinons;  i-nd  of  hind  femora,  the  hind  tibiie  and  tarsi 
black.     Length,  Vi  to  U '. 

"Face  and  cheeks  bhudi.  with  a  <;reenish  retleetion  ami  a  delicate 
whitish  down  on  the  sides.  Antenine  reddi.>^i  brown  ;  front  blacV,  witli 
some  l»Iack,  erect  hairs.  Thorax  brownish  bnuize  color,  with  indistinct 
lonjjitndinal  o'reenish  stri])es;  pubescence  s])ar.se.  short,  erect,  brownish 
y«'llow,  mixed  with  black  ;  a  whitish  sericeous  s])ot  inside  of  the  humeri ; 
l)lenra'  .greenish  black,  with  blackish  hairs.  Scntellum  j>reenish  bronze 
color.  Alxlomen  black,  with  a  bluish  or  purplish  retleetion  and  scat 
tered  whitish  and  black  hairs.  Knob  of  halteres  black,  stem  reddisli. 
Legs  ferru}iinous,  incliuliui;-  the  coxa-;  the  tip  of  unjincs  brown;  the 
distal  third  of  the  hind  femora,  the  hind  tibia%  and  hind  tarsi  black. 
"Willis  iinj^ed  wiili  l)rownish,  proximal  lialf  more  hyaline;  sti^'ina  dark 
brown. 

"Three  nniles  and  two  females. 

"  In  {ienerid  a])i)earance  this  si)ecies  is  very  like  the  European  X.fcmo- 


SYNOPaifj    iil    NORTH    A.MKKKAX    SVUl'IIID.K. 


233 


,(tli(,\m\  it  ilirt'iTH  ospccially  in  the  colnr  nf  llic  cknh',  wliirli  in  tlu'  lat- 
ter art'  IdacU.  Minor  •lillrrcnt'cs  arc  that  in  X.  jVmontta  tlic  \vin;^s  an'! 
iiiori'  <inirorinl,\  colnrcd,  less  tiiij^vtl  with  l>n>\vn  on  tlic  di-stal  iialt',  tlic 
4i;iiii!i  i)al«'i',  t'tc." 

( >i  i;;iiial  dcscriptioM,  conipart'il  with  tlu'  tyj)*'  sprcinicii  in  the  Museum 
,it'( 'i>mparali\(>  'A\M\\n<iy  at  Caniltiid;;!'. 

Xylota  chalybea. 

Sflhilil  ihdhjlifd   W'icilciilJlllll,   All^N.   /wi'i.   Ins.,   ii,  '.I"', 

lldhitdl. —  iN'niisylvania,  "ir;;inial  Illinois  (().  S.). 

i.  Lrn;;tli,  111".  Ih-ad  and  antenna- Idack,  the  lace  liylitly  dnstrd 
on  the  sides.  Dorsnni  of  thorax  violet  steelldaek,  with  short  Idaek 
|iile;  inner  sidi-s  of  tin'  humeri  witli  a  distinet  sihcry  spot;  |»lenra' 
liliicli.  AlxloMieii  steely  Idne  Maek,  with  whiti-  pile  on  the  si(h's  in  front. 
I,c;;s  wholly  Itlaek,  with  hlack  pile;  hind  femora  much  thickened,  hind 
liltia^  arenated  and  teruKuatin;;'  in  a  spur;  hind  (U)xa'  without  tuhercle 
iiclow.     Win;;s  hiaekish  hrown,  less  intense  heliind. 

Two  sjd'ciiiu'ns.     The  species  v.  ill  he  easily  reeo;;nized  by  tlu' entire 


,iii. 


seiiee  of  yellow  in  its  color,  Itv  tin'  dark  winus,  etc 


e»'"» 


Xylota  obscuia. 

Xfllotu  ohxciini  l.ot'W,  Cfiiiur.,  vi,  .'i,"), 

Ihthitdt. —  I'ed  li'iverof  the  North  (l-w.),  Orej^on,  California! 

9.  Len;;th,  10"  '.  Il»'ad  hlack,  front  considerably  prominent,  ami  the 
liice  modi  lately  excavated.  Antenna-  rather  lar;;e,  lirst  two  Joints 
liliick  fuscous,  third  reddish-l'erruyinous,  rounth'd,  aiista  wholly  black. 
Tlioiax  obscurely  bronzeyreen,  no  white  pollinose  spot  iu>ar  the  humeri. 
Siutellum  of  the  same  color.  Abdomen  rather  broad;  tirst  sej;nient 
l.lack,  shinin;i :  second  sej^'ment,  except  two  larj^c,  subtrianj;ular,  shin- 
iiiL;-  bronze,  whitish  pilose  si»ots,  black,  black  pilose,  and  sub-opa(pu' ; 
third  segment  with  similar  spots  coalescing  into  a  fascia;  fourth  seg- 
iiR'iit  wholly  shining  metallic,  the  i)ostcrior  margin  rather  m(Me  blackish  ; 
lillli  segment  shiidng  bl;u;k.  Venter  wholly  scoriaceous  black.  Legs 
hlack,  hind  lenntra  slightly  thickened,  base  of  all  the  tii)ia' dilutely  lutes- 
niit,  the  tip  of  the  hind  tibiie  not  produced  into  a  tooth,  lirst  two  Joints 
ot  the  four  front  tarsi  reddish-ferruginous,  or  reddish  fuscous,  hiiul  tarsi 
wliolly  black,  below  pallidly  tomentose.  Wings  sub-hyaline,  stigimi 
fuscous,  anterior  cross-vt'in  long  and  much  obltqiu'. — Translation. 

Xylota  barbata. 

Xjllolit  harlxild  i.dcw,  ('ciitiir..  v,  10. 

U (tl)ita I. —iiitkii  (Lw.). 

9.  Length,  1(»""".  Jlead  broad,  black,  front  moderately  i»r()jecting. 
hhick  ])il()se.  i'Mrst  two  joints  of  the  antenmc  black,  third  blackish- 
hiowii,  sub  rotund:  arista  black.  Face  moderately  excavated,  white 
!ii)llin(»s(\  rile  on  the  posterior  orbits  below  white,  lallier  longer  than 
Usual  in  Xylotie.     l).>rsi'.m  of  thorax  ol».<curely  coppery  metallic,  mod 


■lately  shining,  white  pil<i 


lllKMIlen 


ratliei'  broad,  blue  l)Iack.  sub- 


:i 


I 


. 


I  'I 


234 


I5UI.LF/riN    ;!1,    UNITED    STATES    NATIONAL    MlsEUM. 


Mil  ; 


^"1 


:i^ 


opa(|i!c,  cIoIIkmI  with  very  sliort  blai'Ic  j)il<';  lii\st  sc^iinciil  wliolly  st|.,i 
blue,  sliiiiiii^,  while  pilose;  second  se^ii.eiil  wi!li  ;i  s'eel  hhie,  \|.|v 
bioad,  s'liiiiii.u,  suit-entire  liseia,  clot  hed  with  while  pile;  thehvofn!. 
lowinii  se.uinents  neiir  the  anti'iior  inai.uin  with  a  siniihu'  fascia,  hut  ii|. 
tenupted  and  less  hioad.  Le,L;s  lilacli,  while  ]»iIose,  femora  at  the 
tij)  with  sliorf  black  pile,  the  hind  leniora  not  incrassale:  tront  tihiir 
rcihUsh  brown;  niid<lle  and  iiiiid  tii)ia'  at  llie  iiase,  and  the  lirst  tw,. 
joints  of  the  iVoid  tarsi,  brownish  icd.  Wm^s  cinereous,  hasal  liali 
hyaline,  sti^nia  Itlackish,  veins  bla<'k. 

3  .  'J'lie  abdomen  somewhat  narrower,  the  metallic  bands  ot'  the  seceinl 
and  thiid  se-jinents  sonn'wiiat  litteous,  tlie  hind  femora  a  little  thick 
c'lR'd,  the  hind  coxa-  nnarnied. 

One  Icmale  froni  Oleuon,  another  from  '\\'aslniijiton  Territory,  and  j 
male  fi'oni  ( "aliiornia.  The  color  of  the  thoracic  dorsum  in  these  leinalc^ 
is  a  cobalt  blue  witli  a  distinct  coppery  retlection  ;  in  the  male  tlieci;ii 
jiery  lustci'  is  aimnst  w  lioll\  wantin.u'.  The  metallii'  blue  cross-baud  ni 
tile  iburih  seunient  of  the  abdomen  in  my  specimens  does  not  apjiciir 
to  be  interrupted,  but  entire.  The  usual  narrow  poUinose  band  on  the 
i'ront  of  the  lemalc  and  the  sericeous  spots  on  the  inner  side  of  tlic 
Iinmeri  aie  i>res«>nt. 

Xylota  eloiigata.  n.  ^]k 

Ilithitid. — Xew  Hampshire,  rennsylvanial,  .Miss<N!vif 
9.  I.en.iith,  10  to  11""".  I'ront,  narrow  aboxe,  shining  Hack,  polli 
nose  across  the  middle.  Face  black,  thickly  whitish  pollinos'.,  i,i;''ti)ul\ 
shilling  on  the  cheeks.  Antenna'  black,  thiid  Joint  larye.  black,  ellipti 
(•al,  arista  wholly  black.  Doisum  of  thorax  sidnin^i'.  somewhat  metalln 
;;ivenish  black,  obsoletcly  coitpery  stript'd  ;  hunu'ri  sericeous.  IMemn 
.shinin.:;  black,  white  pilo.se.  .Vbdouien  elongate,  narrow,  sliininj;'  bhii>li 
metallic  black;  second  sejiuuMit  with  a  si)()t  in  the  nnddle  in  frcuit  and 
the  posterior  part,  and  the  thiitl  segment,  except  a  larjie  trianjjiular  spot 
on  in  each  side  in  front,  subopa<pu';  iburth  sejiinent,  except  <»n  the  iihn 
terror  i)art,  and  the  lifth  wholly,  sliiidnj;'  bla<'k  ;  the  jiile  on  themeta!lir 
])ortions  is  nearly  white.  I'emora,  except  the  immediate  tij)  and  tiir 
last  two  Joints  ot"  all  the  tarsi,  black;  Ibui'  front  tibia',  except  a  breiid 
preapical  blackish  rin;^'  and  the  three  basal  joiids  of  the  four  front 
tarsi,  very  lij^ht  yellow  ;  hin<t  tibia'  at  base  li.uht  yellow,  beyond  blac » : 
thi'ec  basal  joints  of  hind  tarsi  brown,  with  yellow  tijvs.  \Viii<>'sliyaliiii'. 
sti.uma,  and  the  remainder  of  sulxtostal  cell  brown. 

Thiee  specinu'Hs.  White  Mountains,  Auj/ust  1,  Missouri  (Theo.  Tfi 
;4  inde),  and  I'ennsyK  ania  (11.  L.  Keen).  The  coloi'  of  the  le,iis  ])re\"eiit-; 
the  identilication  of  this  species  with  r.i;j;ot's  X.»irt(iJJil'( ra.  Xiilofa  ilm''- 
J'roii'  W'alUer  (List,  etc.,  "u),  uiay  possibly  be  this  species,  but  iIh' 
antenna'  ar<'  not  darlv  lerrn^ihous.  The  len,uth  of  the  abdomen.  ;i^ 
Walker  descrihes  it.  ••alidoaien  lint  ar,  a  little  narrttwer  than  ilic  che-^t, 
and  fudy  twice  as  Ion;;,"  applies  better  ti»  this  than  to  the  allied  species, 


t:' 


:UM. 

w holly  .sitvi 
I  'ililt'.  \f]\ 
I  he  1  \V(»  inl. 
scia,  hut  111- 
norii   at  iji,. 

tl'dllt  tihiii' 
lie  liiNt  t\\,i 
,  liasal    li.ili 

r  the  sccdiiii 
liltlf  thick 

itorv,  ami  ;i 
!(■<('  (finale- 
ale  tile  cup 
■oss-haml  nt 

not  a|i|ic;ir 
>:\\u\  on  ilic 

si(h'  of  thr 


SYNOPrilS    or    NOKTIl    A.Mr.RtCAN    SYh'rillD.E, 


2:5r> 


I. lack,  |i()i!i 
11,  iii;'''()uh 
ack.ollipii 
lat  inctallic 
IS.  Ph'ni;c 
\nu<^  l)lni>li 
I  iVont  ami 
iifj^nlar  spot 
(»n  tlio  pus 
lie  iiH'tallir 
ip  aii<l  llic 
pt  a  britiiil 
lour  iV(»!:t 
Olid  Ithic  V : 
<;s  liyaliiic, 

riicM..  I'd 

;s  ])ri'V('nt> 
i'jllofK  Jlnri- 
's,  but  llic 
idorucn.  :i^ 
I  ilic  clic-;t, 
(1  species, 


Xylota  AnthreaB. 

Xiiliilii  .liilliiciin  Wiilkfl',  i.ist,  etc.,  iii,  'wCi. 

Ildhitdt. — Ni'W  di'i'si'v  (Walkci),  New  IIain])shin' ! 

:.  Iit'n,utli,  !*""".  I'ronr  nairow  alxivc,  shinin.L::  Iihick,  whitish  jiolli- 
iiosc  ill  the  iniddh' and  on  the  sides  heh»\v.  Antenna'  black,  third  ioiiit 
sidxinadrate,  rechlish  brown;  aiisla  liiteoiis  at  the  liase.  I-'ace  black, 
wiiitisli  poliiiose,  exce])t  on  tiie  cheeks.  Thorax  shiiiin.L;  lilack,  sonie- 
wlial  metallic;  p;h^  slitd't,  appiessed,  li^iil  colored;  humeri  sericeous 
]),)llinose;  |)leura'  black,  shininu,  li;:;litl,v  iiollinose.  AbdoiiieP  black. 
Iiiit  little  shiniii.u';  lirst  and  I'.Mirlh  sejiiiieuts  shiiiin;;-;  second,  third  and 
liiuith  se.uiiieiils  ea 'ii  with  a  lar^'c,  siibtriaiiuular,  shiniiiu'  iin'lailic. 
white  i>ilost>  snol  on  each  side,  those  of  the  iliird  narrowly  se])arated, 
iliose  on  tiie  hunt  ii  coiitluent.  la'u's  black,  white  pilose;  I  he  iiniiiedi 
ate  tip  of  tlie  fe:;i()ra.  and  the  liase  of  all  the  tilme.  the  tips  of  the  lour 
front  tibiii',  and  the  lirs!  liiice  joints  of  their  tarsi,  yellow;  the  tip  o, 
the  hind  tibia',  ami  the  iiasal  Joints  of  theii'  tarsi,  fuscous  yellow. 
Win-.-  nearly  hya.liiie;  sliLiina  luleous. 

One   sjiecimeii.    New    lianipshire.     Differs   from    A.  (■l(ni;/<il<(  in    the 
shape  and  color  ot  the  third  joint  of  the  aiiteii.ia',  and  in  the  less  elon- 
;;ale  abtloiiieii ;   Irom   .\'.(il>s(im(  in  liie   front  of  the  fi'iuale  bein^i  iiar 
n)\vcr  above,  the  four  front  tar-  i  lighter  yellow  on  the  basal  joints,  am! 
ill  the  base  of  the  arista  bciii^'  liiteoiis. 

Xylota  nietallica. 

Xijl  >l(i  iiiclallicd  \Vit'(l<'iii,inii,  Aiiss.  Z\v.  Ins.,  ii,  102. 

n<tJ>i1«t. — (leorjuia  (Wied  ). 

Tliorace  a'lieo.  abdoiiiine  iiii;ro;  luacnlis  (piatuor  niagiiis  qnadratis 
luteis.  Mit  eizuriineiii  Kiictkeiischilde  mid  schwarzein  Ilinierleibe,  uiit 
vicr  lii'osseu  vierecUi«;en  i:('lbeu  I'lecken. — .'5 ,'  Linieii. 

Fiihler  ocherbraiin.  rnler<'('si>;ht  nietallisch  schwarz,  weissschim- 
iiHTiid.  Stirn  schwarz.  lAiickeiischiid  erzjniin,  mit  vit'r  selir  schwach 
kiipferr(Uhli(;lieii  Strieiiien  iind  weissschiiiiineruden  Sclmltern.  IJrust- 
M'iten  sidiwiirzlicii,  mil  b;eiter  weissscliiinnieriKU'ii  IJiiide.  iSchild- 
chcii  erzji'nin.  Iliiderleib  schwarz,  zweiter  utid  diitter  Abschnitt  Jeder 
aiijeder  Soite  mit  eiiiein  jjrossen,  <lie  W'liizel  beriihrendeii,  zwei  Dritlel 
(U'r  Ij;iii#;e  des  Abschnitteseiuiiehnieiiden,  in  ji»'wisser  Kichtuii;;' opalisi- 
iciiden  Flecke  ;  der  schwarze  Iv'aiim  zwisclien  den  Kleckenpaaren  iiiir 
sclmial;  vi"rter  Abschnitt  iibeiall  nietallisch  schwarz.  l'"lii;;i'l  uiid 
S('liwin.yer  jiclblich,  Itandmal  leiiinuclb.  IW'inerosl'xelblich,  weni,i;'  weiss- 
licit  stduuimernd ;  hinterste  vrdickte  8cheiikel  schwarz,  mil  I»ost<;('l- 
liorWurzel;  Spitze  der  \()rdern  iScheiikel  braiin;  liintt'i(v  iSchieiieii  uiid 
flcr  Spitze  aller  I'iisse  branii. — NN'ii'deniann. 

Lcn;4t!i,  ISi""".  Aiuenine  ocliie  brown.  I'ace  m«'tallie.  black,  whitish 
])(tlliiiose.  I'^ront  black.  I)(U'siini  of  llioiax  bronze-ureeii,  with  very 
ti'cltle  copiier.v  reddish  stripes  and  while  seiiceons  humeri.  I'leiino 
lihickish,  with  a  broad,  white  pollinose  stripe.     Scntellum  broiiz  ■-.ureeii. 


1 11 


23G 


Bui.LiyriN  :vi,  united  states  national  museum. 


11 


I  l'.l 


Abdoiiu'ii  bliick;  <»ii  t'iicli  side  of  tlic  second  and  tliird  scj;nit'nts  witliai 
lar^c  spot,  tonttliin;;'  tlic  base,  and  includin};'  twotliirds  oC  the  lt'nf>'tli  di 
tli(!  sides,  ill  sonic  ic  licctions  oi)alescoiit;  the  black   interval  betwccni 
flic  spnts  slender;  fourth  segment  wholly  metallic  black.     Wiiij^s  ainl 
halteres  yellowish;  stigma  liiteons.     Legs  reddish  yellow,  a  little  whit 
isli  pollinose;  hind  femora  thickened,  blaek,  with  a  reddish  yellow  1p;isi;| 
till  of  the  anterior  femora  bri;wn:  posterior  tibia',  and  the  tij)  of  all  tl 
tarsi,  brown. — Translation. 

The  sex  is  not  mentioned.     The  species  must  resemble  A'.. />'aj<(/«/o.v(/.  | 
but  has  mncli  lighter-colored  legs. 

Xylota  metalJifera. 

Xi/Iohi  iiKldUijWa  Bi.uot.  Aim.  Soc.  Ent.  Fr.,  18H4,  545. 

Habitat. — Colorado. 

i.  Long.  10""".  Tota  cinert'o  villosa.  Antennis  castaneis;  frontect 
facie  albis,  geiiis  et  tacie.  nti  iiuine,  snperne  nigro  pictis  ;  thoracc  et 
sciitello  obscure  a-nesceiit  ibus,  i  hci  ace  obscure  chalyl»co  vittato;  cajyji- 
tils  albis,  halteribns  testaceis;  al)domiiic  nigro  o])a(;o,  segmentis  seciiii- 
(lis  «'t  t(Mtiis,  utriiHine,  li,\  .icintho  notatis,  (pnirtis  et  (|nintis  similitcv 
tinctis;  jiedibus  nigris,  loiiiTc.  sat  dense-,  albi«lo  villosis;  alls  fere  liya- 
li'iis,  macula  stigniaticab  jiall'de  fiisca. 

('orps  eiitiereiiient  convevt  de  longs  ])oils  gris,  clairsen'cs ;  factM't 
front  blaneliaires.  les  Jones  et  les  cotc's.  ])res  des  antennes,  a  rcHvts 
iioiratres:  thoi'ax  d'nn  noir  bi'onzc.  obscnrc'-meiit  marque  de  baiuU's 
bleiia  .'es;  eensscii  de  mriiie  coiilcur  (ine  le  thorax;  cnillerons  blaiics. 
balancieis  testacc's;  abdomen  dim  noir  o{)aque, -"^  et  ;^'  segments,  de 
ciKKine  cot*',  avee  uiie  niacuh'  ovalaire  allong/'e,  la  base  des  4^'  et  5*^  sej;- 
iiients,  d'nn  bleu  metalli(|ue;  jiieds  noirs,  cuisses  couvertes  de  iioils 
blanchatres  ciairsemes;  ailcs  presipie  hyalines,  un  jieu  roussatres  .sin 
!«  s  nervnres  tiansversales  ainsi  (pi'au  stigmate.     1  sj)eciin. — Bigot,  1. 1'. 

Xylota  coloradeusis. 

Xiilolu  vohirdihusiK  IJi^^ot,  Ann.  Soc.  Ent.  Ei.,  18^4,1)41. 

Ilahitat. — Colorado. 

i.  ]>ong.  10""".  Antennis  ol)scni'e  te.staceis;  fronte  et  facie  ciiiercd 
albido;  thoi'ace  sciitello(iiie  obscure  a'nescentibus;  calyptris  alhis. 
lialteriims  testaceis;  abdoiiiine,  segmento  1",  \"  et  5"  nigris,  '6'\  i"  et 
•"."  Ilavo  anguste  marginatis,  L'"  et  .'!"  iulvis,  ."5"  et  4"  macula  liit;i, 
ntrinque  iirol'nnde  bilida,  .'5"  vitta  niediaiia,  retrorsum  dilatata,  nigris: 
]M(libiis  nigris,  geiiiculis  fiihis;  alis  hyalinis,  macula  stigmaticali 
lestacea. 

-Vntennes  (rim  fauv«  obscur:  iVont  el  lace  converts  d'uue  pruinositc 
iilanchatre:  thorax,  ('•riissoii  iioirs  avee  (piehjiies  rellets  bronzes,  «''paii 
lis  blanchfiti.'s;  (tuillerons  et  balaneiers  testaet's;  c()rp.s  convert  d'tui 
tics  fin  dinet  clairseiiK',  J.mnatre ;  abdomen  avee  les  1'',  4''  et -V' scu- 
nieiits  noils,  ;;'•,  4''  et  ."i''  fin-iueiit  l>o!(h's  de  Jaime  pale,  1!''  et  ■V'  d'nn 
Jaiive  idiigeatre,  .'I'  avee  line  large  baiide  mediane  noire,  profoiideuieiir 


1^^ 


SYNOPSIS    OF    NORTH    AMKRICAN    SYHFIIID.K. 


237 


liitiile  <le  cliaciue  cote,  4''  sivec;  uiu'  hiuidc  scnibliiblc  l(''j;ereiiKMit  ('lar;,ne 
|,ii  ;irii<"'ie;  pieds  iioirs,  genoux,  base  des  tibias  autihiciiis  et  iutenne- 
iiliaircs,  t'aiivcs;  ailcs  li\  abiios,  stigniate  d'un  testaco  pale.     1  speciin.  — 

lli^ot,  1.  e. 

I  Xylota  pachymera. 

A''//o.'((  jiiK'hiiniem  Locw,  Cciitiu'..  vi,  .■)4. 

Il,thifat.—Vn\y.\  (L\v.). 

9.   Leiiyrli,  '.I""".   IJlacUisli  stet'l  b'sic,  abdoiiu'ii  witli  luiir  lutcoiis  spots 
IsiiiiK'l  imcs  witii  only  two,  i-aniy  wilii   in/iic :    aiilciiiia'  insroiis-blaek, 
liird  Joint  ohloiii^;   I'aee  carina;. •;  iiind  r<'nioia  icuiarkably  tiiickcncd: 
]i  ol'  hind  tibia'  itiodiwi-d  into  a  tootli. 

Head  blaclvisli  .steel  liliK-.  lioiii    witii  a   iiH'(li;!ii   la.sfia  aiid   the  lace 
hill'   pollinosf.     I'acc  caiinaie,     'i'lioi'ax  nictailic  "oliiisli  hlattk.  siiiii- 
il;.  witii  two  nioi"   bronze  color*'*'   a])pro\iniate  .si  ript  s  o!' t  lie  doi>inti 
iiioic  tlii(;kly  <-!ollu'd  wirli  piK  .     A])doin»'n   b!aclu.-.ii    .steel  blue,  some- 
limes  more  l)roiize  colored;  .second  se'^'nient  wirli   tw(t  oblonj^'  biteoii.s 
>]i()ts,  not  attaining:  the  inaruin  of  the  segment,  laiely  ob.solele;  iVont, 
liiiir  of  the  liiinl  .■-eminent   sliinin;;-.  .sonietnnes  with  two  small   iuteons 
s|iors,  posterior  pa  it   black    and   snltopa(pie:    the   iollowinji'   seuinents 
'vholly  sliiniii";.  blaeUisJi  sleel-bliie.  larely  hlacldsh  l)r<>nze;   \enler  !ule- 
iiiis.  last  sejinients  metallic.      l'\>]nora  blackish  steel  blue,  the  hind  pair 
nnaikably  Thickened  ;  front  and  middle  tibia',  exee])t  the  wiiitish  base, 
iiM'iais  black,  hind  ])air,  except  the  whiti'  base,  iilaclc,  si ronj^ly  arcuate, 
produced  into  a  tooth   at  the  tip:  Iront  taisi  whitish,  hind  tarsi  black- 
ish luscous,  t)ie  last  two  joints  of  all  black,    ^^'in^s  blackisii  cineieous. 
stiuina  fus(;ous. 

Xylota  pietiosa. 

Xilhitii  jircliima  I.ocw,  W'ii'u.  Kiu.  Moiiiilsclir.,  i,  :V,I ;  ('I'liiiir.,  vi,  ')'.\. 

llal,it,(f. —Cnhix  (Lw.). 

-.  ben<;th,  10 '.     Lig'lit  jireen-broiize,  very  shining' ;  abdomen  stecd- 

hliie.  with  four  lijiht  yellow  s))ots;  tiie  I'ront  and  middle  tibia'  and  liie 
hasiil  third  of  tJje  hind  libiie.  and  all  the  tarsi,  exce))t  the  last  three 
juiiits.  whitish  yellow. 

i'ace  i^reenish  brf)nze,  wiiite  }iolliiiose.  .\ideiina'  black,  third  Joinr 
>iilirotund,  arista  of  the  sanu-  color.  I^'ront  greenish  bron/.e.  white  pol- 
hiKise.  \'ei'li(;al  triaiiji'le  uarrow,  jireeinsh  steel  blue,  shiinufi',  s|>arse!y 
hliick  pilose.  Ocelli  remote  Iroui  the  occipital  mar^^in.  TUorax  vei'y 
hulit  .urecinsh  bronze,  near  the  Iiiml  mar.ii'in  somewhat  steely  blm-.  o'l 
(M(  li  end  with  short  white  pile,  between  the  wind's  clothed  with  black. 
Scu'elhim  steel  blue.  Abdomen  li^lit  steel-blue;  second  sej^nient 
wi;ii  two  ])alli<l  yidlow  spots,  of  which  the  ])osterior  aii;.;lcs  extend  to 
the  lateral  maruiiis  of  the  abdomen.  ]»osterior  part  of  the  sv'^nient 
blackish-violaceous,  opaciue;  third  sej^Muent  with  two  transverse  pallid 


"y 


''i 


I 


I 


■J->H 


1^' 


I 

I, 

,i  (i 

I'M'' 


'X\ 


li'Ll.KTIX    ;!1,    UNITED    STATES    NATIONAL    MUSEUM 


,\i'IIi)\v  .spots,  luniiiiij;  a  broadly  iiiU'iruptcd  las(;ia,  bcliiiid  \]\vm}  sjiots 
l>l;ick  violacco.is,  t\w.  i)o.st<Tior  ;iiai'j;in  metallic  hlnc.  Venter  ]);illi(l 
vcllowisli,  lirst  sej^iiieiit  iiictallie  blue,  tlie  iasi  violaceous.  Troeliaiiters 
witli  the  iiii:iie(li;ite  base  of  the  1'eiiiora  yellowisli.  Femora  j^Teeiiisli 
bi,iiize,  t)ie  extreme  tip  of  the  front  and  middle  pairs  yellowish;  liind 
leiiior;:  mulei'ately  thieUened,  with  an  obtuse  jtrojeetioii  below  near  ihc 
tip  on  til"  lowei'  side,  and  on  the  margin  of  ;lie  projection  with  black 
spines.  Front  and  middle  tibia'  very  pallidly  yellowisli,  neaHy  white; 
liind  tibia'  incurved,  the  basal  tliird  whitish,  midtlle  third  black-viola- 
icons,  distal  third  black;  basal  joints  of  tarsi  liyht  yellow,  third  joint 
fuscous,  the  last  two  black.  Tejiuhe  white,  the  mar<iin  and  the  cilia 
black.  JIalteres  diluteiy  yellowisli.  Wiujis  (iiiiereous  hyaline,  near  the 
tij)  a  little  more  obscure,  stif^ina  aii<l  veins  black. 

ADDITIONAL   NOU'J'H   AMKTJICAN   8PECIES. 

Xylota  aronata  Say,  .r.  Acml.  riiil.,  vi.  \&-l;  ConipL  Wr.,  ii,  3.j7. — Mexico. 
Xylota  subcotttaKs  Wiillit  r,  Trans.  Eut.  Soc.  N.  S.,  v,  2'Jl. — Mexico. 


SENOGASTER.* 

SnwonsU-r  Macquarl,  Hist.  Nat.  Diiit.,  i.  511),  18;!l:    Dipt.  Exot.,  ii,2,72. 
Acrochordonodin  \Vv^o\.  ISnll,  Soc.  l']nt.  dc  UraiK.'O,  1878,  131. 

$  .  Slender,  nearly  bare,  rather  lar^e  species.  Head  hemisplierical. 
formed  cliielly  of  the  «'yes.  Auteniue  situated  near  the  iwiddle  of  the 
head  in  profile,  lirsr  two  joints  short,  tliird  rather  laifie,  oval ;  aristii 
l)art'.  Face  small,  short,  subcarinate,  concave  from  anteiiniu  to  or;'! 
maruiii,  ei)istoma  truncate  obliquely  in  front,  maryin  of  mouth  horizon- 
tal below;  cheek  very  nairow  below  the  eyes.  Fyes  laj'f^'e,  bare,  ,\itli 
an  area  of  enlarj^ed  facets  in  front  above  the  antenna';  frontal  triangle 
small,  eyes  con ti,y nous  for  a  short  distance,  vertical  tiian^^le  lonji,  acute: 
)H»sleii(»i'  orbits  narrow.  Abdomen  lonii'.  third  sef^inent  very  much  con 
iracted,  cylindrical,  narrow,  the  alidomeii  ayain  widened  at  the  end. 
liind  femora  arcuate,  thickened,  with  a  stronjjf  bitld  spine  below,  near 
the  ti]).  Willis  small,  slioiter  than  the  abdomen,  mar<>inal  cell  open. 
Ihiid  lon.uitudinal  vein  bent  jicntly  into  the  lirst  posterior  cell,  last  .'^ec- 
lion  of  fourth  vein  .u'ently  siiiiMte,  anterior  cross-vein  obli(piej  joiiiiiiii' 
i!ir  I'oiirtii  vein  beyond  the  middle  of  dis<'al  cell. 

It  seems  very  probabU'  tliat  Acroclioydoiiodfs  lJi;;ot  is  but  the  fcinale 
of  a  true  Scuoi/iister.  The  chai'acter  in  whicli  this  f^enus,  founded  upon 
a  female  specimen,  is  said  to  dilfer,  is  juecisely  wiiat  mi;:;ht  be  expeeled 
ill  that  sex,  viz,  a  less  contritcli  <1  abdonu  n.  'i'he  ty])e  of  Senofiaster 
is  *S'.  cocritlcsccnn  Maccpiait  (1.  c),  from  Cayenne.  South  America. 


•.rfyoS,  sIcikUt;  ycxdn'/fj,  abdomen. 


jeiiogastt 
Si:  til) 

IhthitK 
i  .  Le 
liie  midd 
iiiu'le  bl;i 
\c!low. 
lare;    d( 
■listant.  • 
inldish, 
uliere  it 
V'lidouu' 
iilack,  y( 
AJde  bel 
;iiar;j;iii  ; 
ill  front, 
;!s  the  pi 
|iy,uiiim  ; 
ishldack 
line. 
One  SI 
.Macqu 
the  i)r('st 
iaeiition( 
irvation 
1878,  fen 
Mia  to  o 


Sjiri 
Cop 

Kathe 

aiu's.     II 

!lie  thoi 
-mall,  s 
lives  bii 
M'l'tellui 
riacled  \ 
I'roiit  ai 
iiaiily  tl 
filial  ce 
near  the 
Liir.ie). 


SYN0Pf<I8    or    NOliTll    A.MKincAX    SVUI'IIID.E. 


239 


lU'St'    SJIOtS 

rocliiiutcrs 
I  y-rct'iiisli 
visli ;  Iiiiul 
\v  iH'ar  tlie 
witli  black 
i''l.v  wliite; 
lack-viola- 
lliinl  Joint 
I  the  cilia 
e,  near  the 


CO. 


2,72. 

isi»lierical. 
Idle  of  tlio 
■al ;  arista 
voi  to  or;'l 
li  horizon- 
bare,  ,\itii 
il  tiiaiijilc 
11  ji',  acnh': 
IIUU'll  coil 
the  ('11(1. 
elow,  near 


ici'.ogaster  Conistocki.     (.I'hituX',  ti;;s.  1,  hf,  1ft.) 

SeiiufiaHtrr  ('nniHtDcki  Willislon,  I'roc.  Am.  I'liil.  Soc.  \x,  l!2(). 

Ilahit(it.~ye\\  York! 

S.  Leii<;fh,  \'2">'« ;  of  \viii,u,  S""".  Face  yellowish,  blackish  towards 
iiic  middle,  and  covered  with  silvery  white  i>nbesceiice.  Frontal  tri- 
iiiyU^  blackish,  whitish  near  the  eyes.  Antenna'  yellowish-red;  arista 
\('!low.  Vertical  triangfle  oi)a(|iie  black.  Thorax  black  opa(iue,  Jiearly 
jiare;  dorsum  with  four  conspicuous  olive  jj-ray  stripes,  nearly  iMiui- 
ilistant,  the  lateral  ones  reachini;'  iVom  the  yellowish  humeri  :  pleune 
'rddisli,  dusted  with  whitish,  especially  on  the  meso  and  .sterno  i>leura.', 
where  it  forms  a.  conspicuous  stripe;  scutellum  with  a  yellow  margin. 
Alxlomen  blackish-brown  ;  tirst  sejunient  as  broad  as  the  thorax,  nearly 
ohick,  yellow  on  the  sides:  second  seiiinent  elongate,  scarcely  half  as 
Aide  behind,  with  two  whitish  elonjiate  sj»ots,  '.utt  reachiii};'  the  liiiul 
;iiar;jliii ;  third  segment  of  the  same  length,  narrow,  (cylindrical,  yellow 
in  front,  narrowly  above,  luoadly  on  the  sides;  fourth  .segment  as  long 
iis  the  preceding,  expanded  ]>osteriorly,  I'ormirig  with  the  globular  hypo- 
|iygium  an  ellipsoidal  mass.  Legs  reddish  yellow,  hind  femora  browu- 
isli  black  on  the  basal  half;  hind  tarsi  brownish.  Wings  nearly  hya' 
line. 

One  speiiimen  (Piof.  J.  11.  Comstock). 

Macquart's  descr'ption  and  ligiire  of  S.  coentlcsccHS  agree  quite  with 
the  present  species,  except  that  the  conspicuous  thoracic  stripes  arc  not 
iii('iiti(tned  nor  indicated.  Was  tiie  si»('(!i!ii('n  he  described  in  good  pres- 
I'l'vation?  Bigot's  Arrorhonloiiodcs  viftatiis  (Bull.  Soc.  Eut.  France,  131, 
1S78,  female)  ai)plies  very  well  indeed.  Is  it  possible  that  they  all  per- 
MJii  to  one  widespread  sjx'cies  .' 


SYUITTA.* 

SiirUta  .St.  Fai-KCiin  and  .'^crvilli',  Kiicycl.  Mctli.,  x,  808, 1825. 
Copriiia  Zi'tterstc'dt.  Ins.  l.;!)!]!..  r>>;4,  HIO. 

Kather  small,  slender  species,  nearly  bare,  Idack,  with  yellow  mark- 
iius.  Head  hemispherical,  not  at  all  flattened,  sonunvhat  broader  than 
Hie  thorax.  Antenna'  short,  third  Joint  round;  arista  bare.  Face 
'inall,  snbcjariiiate,  nearly  .straight,  epistoiiia  but  slightly  ]»rodiu;ed. 
lives  bare,  very  hirge,  coiitignoits  in  the  male.  Thorax  rather  long, 
Mi'tcllum  thin  on  its  edge,  dark-colored.  .Vbdomen  slender,  more  con- 
riaited  in  the  male,  about  twice  as  long  as  the  thorax,  and  not  wider. 
Fi'oiit  and  middle  legs  slender  and  small,  tlie  hind  femor.i  extiaor.li- 
iiaiily  thickeru'd,  with  slnu't  rigid  spines  below  ;  hind  tibiie  bent.  Mar- 
■/uvA  cell  of  wing  open;  viiiid  vein  gently  cnrved  ;  anterior  cross-vein 
iii'iU'  the  middle  of  di.scial  cell  lectangnlur.  Typi!  of  genus,  S.  pipicn-s 
UnwC). 


n 


I ' 


'V 


*  2iiiJi^fty,  to  luim. 


; 


1 


! 


i    I 


I, J) 


f 

1 

t  ', 

'  1 

i 

1 

1 

t 

i'' 


in 

l! 


m  w  1' 


240 


i;ii.r.i:Tix  si,   ixitki)  statks  national  miskum. 


Syritta  pipieiis  (I'ljiti-  XII,  li'.s.  1,  ]ii,  ]h,  I 


!■). 


AIiincii  ii'ijiidin    l.iiiiu'.  J'.iiiiin    SiucicM,   |i.  \>  fi,    l*(il  :  S(Iii',iiil<,   I'liiiiii.    Insiet 
Aiislr.,  !l|.'.. 

rri/K/y/.f  y;/y//('».s  S<  iijKill.    I'.lllnlil.   ( 'll  I'll  inliiJI,  W>\K 

Siirphu:!  jt'iiiiiiiH  I'liliriiiiis,  Sjicc.  Insi ci.,  ii,  l;!l.  (Ifi:   i;iil(>iii.  S\hI.,  iv,  olO,  ll;(- 


I'iili/.ir,  F;iiiii;i  (icnii..  Nwii.  '.'(I. 


Mihsiii 


FmIiH 


Sv.sl.  A;iil..  I'll. 


Fallen 


.tmIi..  !•'   'J. 


Cojiyiiiii  jiij/'u'iis  '/.i{\i'if.l.'i\\.  Ins    Lull 


A'(//o/ 


i(  /iiiifCiis    I 


Ii'i'ji'u 


if:>iMir.,    Ii 


-I.  i:.. 
ii;!,  1. 

A/iJom  jiid.iiiiiii  S;iy.  Ann  r.  I'.n!.,  i.  ul.  v  iii  :  ('itmn 

Zw.  Ins  ,  ii.  II)-.',  II. 
Surithi  jii/iiiihy  M,-i(i|ii,;i  I .  lii-i.X.il.  Iiipl..  i,  .'>.;."> 


,  \\i-..  i.  It;-.  Wi-d 


•  ■niann,  An 


I  :  M. 


-en.  S\,-,|. 


ln'SI'lll'.,    \  ii 


ll;;,  pi.  Iwii.  11-.  Jl  :  /.Ml 


Dinl. 


ii.  ^-1.  1  ;   \  iii,  :;il):i:  Si 


■!■,  \ 


'it.  (i 


ii.   Iv:  1  ;    I'':iiiiia  All  -1  r,,  i. 


>.  >> 


Hdhlidl. — Tlir<)ii,ul)out  til-  Liiitcd  Stiitcsl,  l^iirojic,  Asia,  Alrica. 
(?    9.    LciKitli,  7  lu.S"   ,    !■',;;•(' :;ii<l  front  siitiiiv.  vcllowi.sii  while.     I''i 


■nlil 


of  I'ciimIc  iiiiirow  iiitivc,  .shilling-  Itl.ick  ou  iipixT  lisiit'  \\it!i  two  .si!;;ili 
])ollii,(isr  Ni<oLs;  viTticiil  li!an,L;Ic  of  iiiiilc  cloiiuatc.  sliiiiiiiL;'  M;ific.  jiollj 
ii(»;-('  in  Iront.  AntiMiiia'  irtldi.sii  vcllou.  Dor.siMii  ol'  llior;ix  biacii. 
Lari' in  lioiit,  AvitliUvo  ajijuc  xinialt  ]»ollin<i.si>  s])ols;  tlic  liuint'ri  ami 
lu'liintl  (Ik'Mi,  icacliiniv  to  tin-  sutmc,  ycilowi.sji  wliitc  iiollinu.sc.  LMema 
illicitly  vliilisli  |)o]linos(  .  .Mitionifn  in  tlu'  malt' as  t\)ll(»\vs:  i'.lack, 
lirsr  tliivc  s(',:;in('nls  ojikjuc,  flic  lomtii  and  tiu^  liyi»()i>yyinm  .sliiniii;;; 
tiic  narrow  sides-  <,("  ||i,-  {\y<{  scjiinctit,  and  a  broad  si)ot  on  cacli  side  n\ 
t'acli  of  tlic  two  followiiiii'  s('<;nH'nts,  ytdlow.  ol'ti'ii  wliilisli  ]iollino.sc: 
foiirtli  so^nicnt  ii>  fr(»nt  w  tli  a  narro.v  intcrrnidi'd  yollowisli  wliiti 
pollinosc  cross-l)aiid,  tiu'  bind  margin  of  Ibc  sejiniont  iiari'owly  yellow, 
III  tlic  female  tlie  spots  smaller,  (be  sides  of  tlio  tliird  sei^inent  in  front 
nietallie,  scai'cely  at  all  yellow,  but  with  a  li^rbt  ]»ollinose  spot:  otliei 


wise  like  (be  mal 


"(Mir  front  Ici-s  s 


eliowisb  red,  witb  ol)seiire  brown 


isli  'narl<iii;.:s:  bind   femora  black    witb  the  l>ase  and  a   usually  incoiii 
)»lete  riiiu'  near  tlu'  middle,  I'eddisb  yellow;  bind  tibia-  reddisli  yellow. 
at  t'le  middle  and  tip  brown  or  black:  bind  tarsi  rcddisb  yellow,  iiioiv 
or  less  brown  on  I  be  ujiper  side.      \Vin;^s  liyaline. 

The  most  common  species  in  the  fa^iily,  everywliere  and  at  all  times 
alunxlant  from  sprinij'  till  auiumu. 

ADDIJIOXAL  X0L"JI1  AMKK'U  AX  .SPECIES. 


Xylota  Mexicana  ni,!;'(it,  .Vnn. 


•"ni,  i'r,,  I--I,  5;!',). — Mexico. 


CIIUVSOCIII.AMYS.* 

Fcrdiiii'iidca  IJiindiiMi,  Ann,  c'rilc  .Siicnyi-  .\al.  di  liolojiiiii,  1844. 
r//;-//Mi. /(/((/(lix  Il()ii(i,-iiii  in  lilt.:  W'nlki-r.  Iiist-i-t  I'lrit.,!.  'Sii>,  l~."iL 

Moilcrati'ly  !arj;c  species,  metalli<'.-!Li-oldeii  or  bvon/egreeii,  witb  lij^lit- 
colorcfl  pollinosc  stri|)cs  on  the  doisum  of  the  thorax.  Ilead  lieinis- 
pherical,  .somewhat  bi'o;ider  than   the  thorax.     Antennae  short,  third 

X/jvOo',  ui'l'l ;  .Y'^'V"!--.  a  niaiille. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


241 


joint  rather  larjie,  obli(iiiely  ovnl  or  rouudod,  arista  naked,  basal.  Face 
gpiitlj'  concave  in  i)rofile  below  the  antenuie,  with  an  obtuse  tubercle 
near  the  middle.  Eyes  pilose,  contiguous  in  the  male.  Scntelluni  large, 
yellowish,  translucent,  its  bonlei-  and  the  lateral  benders  of  the  thoracic- 
dorsum  with  macrochait.e.  Abdomen  not  much  longer  than  the  thorax, 
elliptical,  thickly  pilose.  Legs  slender,  the  hind  pair  scarcely  elongated. 
Marginal  cell  of  wings  open,  the  third  vein  gently  concave  into  the  tirst 
posterior  cell ;  anterior  cross- vein  near  the  middle  of  discal  cell, 
oblique.    Type  of  genus,  C  aurea  (Scop.)  Walker. 

TABLK  OF  SPKCIES. 

1.— Hind  l)orders  of  the  second  and  third  uhdoininal  segments  black,  opacjue;  arista 
reddish 2 

Hind  borders  of  thesu  segments  not  opaque  black 4 

2.— Face  in  the  middle  with  a  V-shaped  black  spot 3 

Facial  spot  indistinct  in  outline;  front  femora  at  base  and  the  tip  of  all  the  tarsi 

black buccata,  5 

3.— Legs  reddish-yellow dives 

All  the  femora  brown;  tibiae  likewise  infuscated nigripea,  ,? 

4.— Facial  spot  V-shaped  ;  arista  reddish nigripes,  9 

Facial  sjiot  indefinite  in  outline;  arista  black crcssus 

Chrysochlamys  crossus. 

Chnjaochlamiin  crcemiti  Osten  Saokcii,  Western  Dij)tera,  341. 

Habitat. — Utah  (().  S.), California,  Washington  Territory,  New  Mexico! 

9.  Lengtli,(Sto  11""".  llesembles  C.tl  ires  close]}-,  but  theabdomcn  lacks 
the  snbopa(iue  hiinl  margins  of  the  si-cond  and  third  segments:  tlu'  pile 
(if  the  abdomen  is  longer,  the  general  form  broa<ler.  The  brown  spot 
on  the  faciial  tuben;!!'  is  of  an  iiidetiiiite  onflinc,  not  V  slia|)ed  as  in  C. 
ilifcs  and  nigripes.  Antenna'  leddisli  Itrowu,  more  nearly  uniform  in 
co'or;  the  arista  black.  Abdomen  uniforndy  of  a  bright  bronze-green, 
thickly  beset  with  golden  yellow  pile.  Legs  sometimes  of  a  wholly  sal- 
mate  reddish-yellow,  but  the  base  of  the  fonutra  often  fuscous,  or  even 
liliickish. 

9  .  I'ront  with  a  broad  poUinose  cioss-band,  the  dorsum  of  the  thorax 
with  more  distinct  pollinose  stripes. 

Three  nniles  and  one  female  (H.  K.  Morrison,  (1.  F.  Gaumer). 

Chrysochlamys  dives.     (Plate  XI,  tigs.  .').  ."irt.  > 

rhninochliiinnn  divcn  Ostcii  Sacken,  West.  Dipi..  :i41. 

7/(f/*(7r'^— Illinois,  IMissouri,  Canada  I  Kentucky  (O.  S.). 

c? ,  9  .  Length,  8  to  12'"'".  Face  largely  covered  with  ochraeeous  pol- 
Ii'ii.  in  the  middle  with  a  larj^e  V-^liai>ed  black  spot,  siiiuiug;  cheeks 
^liiiiing,  in  front  with  a  narrow  black  strijje.  Front  of  female  shining 
i'lack,  across  (he  middle  with  a  !)i()a(l  ochraeeous  pollinost!  band.  In 
the  male  the  frontal  triangle  is  black,  shining  above  the  base  of  the 
iintenna'  only,  pollinose  along  the  eyes:  tirst  and  second  joints  of  tlie 
iiiitennie  blackish  above,  reddish  below,  the  third  joint  dark  brown  on 


ir 


I 


;  •.■* 


'V] 


242 


mi.LETIN    HI.    UNITED    STATES    NATIONAii    MUSEUM. 


tilt' upper  lialf  or  two-thirds,  yollowish-rcd  below;  the  arista  reddish. 
Thorax  beset  with  bhickish  or  hitesceiit  pile,  lateral  margins  and  a 
stripe  of  even  width  eaeh  side  of  the  middle,  iMuereous  poUinose;  bri.s 
ties  black;  scutellum  liitescent  or  yellowish,  with  short  yellow  pilf, 
Abdomen  pure  bronze-eolore*!,  densely  beset  with  short  jjolden -yellow 
pile  i!i  the  female,  somewhat  darker  in  the  male;  the  black  siib-opaquf 
hind  borders  of  second  and  third  sejjments  sub-interrupted.  Lej,'s  sat- 
urate yellow;  the  last  two  joints  of  tarsi  inluscated  orblackisli;  the 
four  front  fj'inora  (male  ?)  may  have  a  <lark-brown  spot  in  front.  Wiii][;s 
yellctwish  hyaline  on  the  antero-proximal  portion,  grayish  hyaline  aloiiM 
the  posterior  portion;  costal  (;ell  yellow,  stigma  darker;  a  brown  cloud, 
in  the  shape  of  a  short  cross-band,  between  the  origin  of  the  third  vein 
and  the  cross-vein  at  the  base  of  the  last  posterior  cell;  anterior  cros.s 
vein  likewise  clouded  with  brown. 

Four  specimens  (D.  W.  Coquillett,  Professor  Riley,  G.  J.  Bowles). 

Chrysochlainy8  buccata. 

('hriinochlaiiiiix  hitccafa  Lotnv,  Coiitnr.,  iv,  72. 

Habitat. — Virginia  (Lw.), 

9.  Length,  S""".  IJronze  colored;  soutellum  testaceous;  front  black, 
with  a  cross-band  of  ochraceous  pollen  in  the  middle;  antennre  black 
above,  reddish  below:  arista  reddish;  cheeks  with  a  black  stripo. 
IJlackish-bronze  colored,  greenish  shining;  front  deep  black,  shining;, 
with  short  black  pile;  in  the  middle  a  rather  broad  (uoss-band  of  oclna 
ceous  pollen.  Antenna^  rather  large;  first  Joint  black,  the  second  and 
third  joints  black  above,  reddish  below ;  arista  bare,  reddish.  Face  ro.i 
dish  yellowish,  very  concave  and  ochraceous  pollinose  above,  swollen 
below,  with  a  large  obtu.^e,  sonunvhat  brownish  tubercle;  cheeks  scp 
arated  from  the  face  by  a  narrow  black  strij)e.  Dorsuni  of  thorax 
clothed  with  short  lutescent  pile;  lateral  margins,  aiul  two  longitudinn! 
stripes  of  even  width,  cinereous  pollinose.  Scutellum  reddish,  with 
short  lutescent  pile;  bristles  on  the  margin  black;  lateral  conit'i> 
blackish.  Abdomen  shining,  with  short  lutescent  pile;  hind  margin  o; 
first  and  second  segments  oi)a(iue  black.  Legs  ochraceous,  the  basal 
half  of  the  four  front  femora  and  the  tip  of  all  the  tarsi  black;  front 
tibiic,  except  the  base  and  tip,  and  the  base  of  the  hind  femora,  sliglitlv 
subinfuscated.  V.Mngs  somewhat  cinereous  hyaline,  lutescent  near  tbu 
base;  costal  cell  ;iJid  stiguia  luteous,  the  base  of  the  third  vein  and  tin 
cross-veins  at  the  middle  of  the  wing  clouded  with  black. — Translation 

Chrysochlaniy.g  n; gripes. 

r/iri/so(7i/a»i.v<  niijrijjes  Osten  Sacken,  Wo.st.  Dipt.,  341. 

Habitat. — Mas.sachusetts  (O.  S.). 

"  ^  ,  9  .  Length,  about  Of"'".  General  color  much  duller  than  in  C 
dives,  metallic  blackish-green :  pollen  on  the  face  and  front  dull  yellow 
ish;  frontal  pollinose  cross-baud  (9)  much  narrower,  and  hence  tk 


SYNOPSLS    OF    NORTH    AMl'.RICAN    «YKPHIl)^E. 


AS 


:  reddisli. 
[18  and  It 
;)se;  bris- 
How  pilf. 
en-y<'ll()\v 

ll)->)l»il(iue 

Lt.'j,'s  sat- 
kish;  the 
.  \Viii,u> 
liiR'  alouM 
\vu  cloiitl, 
:liir(l  vein 
L'ior  ci'o.s> 

owles). 


out  black, 

mfc  black 

ck   stripe. 

V,  shilling;, 

1  of  ochni- 

econd  and 

Face  10 'I 

e,  swolk'ii 

iteks  sc]! 

of  thorax 

iiyitiidina! 

dish,  witii 

al  roriior^ 

nuu'^iii  (t! 

tlie  basal 

ack;  front 

a,  slis'htl.v 

it  near  the 

in  and  tin- 

ranskitiou 


than  in  C 
ull  yellow 
hence  tk 


black  shininj,'  upace  above  the  iintcnnii;  lar;rer.  The  pl•(^vailinJf  pu- 
bescence on  thorax  and  scutelluni  is  black;  black,  opaque  hind  mar- 
gins of  the  segments  two  and  three  in  the  male  only,  not  in  the  female. 
Femora  brown,  except  the  tip;  tibiie  brownish  yellow,  more  or  lens  in- 
fiiscated  befo'e  the  tip,  especially  the  front  pair;  tarsi  brownish  red  at 
base,  brown  at  tip.  Winfjs  {,'rayish  hyaline,  feebly  tinned  with  brown- 
ish yellow  at  the  root  and  on  the  sti^nna;  costal  cell  sub-hyaline  in  the 
female;  brownish  clouds  on  cross-\«Mns  very  weak." — O.  Saeken,  1.  o. 

MERAPIOIDUS. 

MerapioidHH  Uij^ot,  Hull.  Soc.  Kiit.  ilc  I'liiiici-,  187H,  »i4. 

Large,  pilose  species;  black,  with  metallic  bands  on  the  abdomen. 
Head  subtriangular  in  front  view.  Front  of  female  short,  but  little 
inclined,  nearly  plane,  moderately  broad.  Antenna;:  first  joint  slender, 
t'vlindrical,  about  three  times  as  lonj,'  as  the  short  second  Joint ;  third 
joint  very  broad,  short,  in  front  slij-iitly  (toncave,  below  tln'  in.sertionof 
second  Joint  ])rolonged  downward,  obtuse;  above  extended  into  a  coni- 
cal point,  slightly  convex  on  the  upper  posterior  part  and  terminating 
ill  the  arista,  which  is  a  little  thickened  at  its  base.  Face  extending 
downward,  not  descending  far  below  the  eyes,  obtusely  conical  below, 
gently  concave  below  the  antennae,  and  with  an  obtuse  tubercle.  Eyes 
bare.  Abdomen  depressed,  broad,  elliptical.  Legs  simple.  Wings: 
marginal  cell  open  ;  third  longitudinal  vein  nearly  straight ;  last  sec- 
tion of  fourth  vein  slightly  sinuate.  Joining  the  third  before  the  costa; 
anterior  cross-vein  oblique.  Joining  the  tburth  vein  near  the  outer  third 
of  the  discal  cell.     Type  of  genus,  M.  villosus  liig.,  Jforth  America. 

MerapioiduB  villosus.     (Pliitc  XI,  li;;s.  •^,  Ja.) 

Mernpioidus  villosus  B\<iot,  I'.ull.  Sot.  En(.  do  Franco,  1879,  ()4. 

Habitat. — Georgia ! 

9  .  Length,  14""".  Front  black,  a  little  metallic,  moderately  shining, 
with  reddish  pollen  and  black  i)ile.  Antenna',  black,  l-'ace,  except 
broadly  on  the  tubercle  and  thence  to  oral  liorder,  covered  with  dense 
whitish-yellow  dust  and  whitish  pile.  Cheeks  black,  shining.  I'ro- 
hoscis  short.  Pile  on  the  lower  posterior  orbits  long,  whitish.  Thorax 
ub.scurely  metallic,  moderately  shining,  the  pile  moderately  thick  and 
nither  long,  more  abundant  and  whitish  en  tln^  pleura^;  post-alar  cal- 
losities with  tufts  of  thick,  long,  whitish  pile.  Abdomen  opaque 
bla(!k,  with  long  whitish  iiile  on  each  side  near  the  base  and  along  the 
lateral  margins,  elsewhere  short ;  first  .segment  with  a  small  shining 
s])ot  on  the  hind  margin  on  each  side ;  second  segment  with  a  large 
wbtriangular  spot  on  each  side  and  narrowly  in  the  middle  behind: 
tliird  segment  with  a  broad  fascia,  broadly  interrupted,  and  a  small 
obtuse,  posterior,  median  triangle;  fourth  segment  with  a  narrower  fas- 
cia narrowly  interrupted ;  fifth  segment  ou  the  anterior  margin,  shining 


>  I'l 


1'    -' 


244 


nULLKTIN    3],    UXITKI)    STATES    NATIONAL    MUSEUM. 


metallic,  lit'fjs  black,  with  white  i»ilc;  fcmoiii  at  tip,  aud  tibise  at  batse 
anil  tip,  reddish.  Winj,'8  hyaline  ;  subcostal  cell  from  tip  of  auxiliary 
vein  yellowish  ;  cross-veins  faintly  clouded. 

One  specimen  which  agrees  sufliciently  well  with  BigofB  description 
of  male  and  female. 


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SPILOMYIA.* 

iSpi/om.virt  Meii^cii,  Illint'r'H  Miififi/iiif,  ii,"J7:!,  180;^. 
MUtf.myia  Macquart.  Hist.  Nat.  Dipt.,  i,491,  IhlM. 
CalUprohola  KoiKlaiii,  Dipt.  Ital.  Prodr.,  i,  47,  1856. 

liiirye  robust  .sjx-cies,  black  with  bright  yellow  spots  or  bands  on 
thorax  and  alulonicn — wasp-like  in  ajtpearaiice.  Hea«l  hemispherical, 
broader  than  the  thorax.  Anteniue  porrect,  moderately  or  considerably 
elotigated,  the  third  joint  usually  rounded,  not  twice  as  lotig  as  broad; 
arista  bare.  Eyes  bare,  contiguous  in  the  male.  Face  nearly  vertical, 
gently  concave  in  protile  below  the  antennas  only  a  little  tnbercularc 
below,  if  at  all.  Thorax  short  and  broad,  considerably  convex  above. 
with  yellow  spots.  Abdomen  twice  or  more  as  long  as  the  thorax,  veiy 
convex  above,  usually  of  nearly  equal  width  throughout,  sometimes 
gently  <»••  broadly  oval;  with  yellow  bands.  Legs  strong;  hind  femora 
elongate,  with  a  ])rojecting  tooth  below  near  the  outer  i)art.  Wings 
brownish  in  front ;  marginal  cell  open,  third  longitudinal  vein  nearly 
straight,  tiie  vein  beyond  the  tij)  of  the  anal  cell  is  continued  outward, 
nearly  parallel  to  the  hind  border  of  the  wing. 

Ty])e  of  genus,  (S'.  diophthalwa  Linne,  Euro))e. 

TABLK  OF  SPP:CIES. 

1. — Second  joint  of  anttMuiM'  mncli  lon;^*'!-  than  tln'  lirst  ;  second  Hc^inciit  ot'tlic  alido- 
int'M  will)  a  Inoad  arcnatt!  yellow  l)and,  the  tliiid  !im<1  foiiitli  witli  a   slrn- 

dcr.  median  interrn])teil  one qi7adrifasciata 

.■^eiond  Joint  of  llie  anteim.'e  not   nineli   loni;cr  ilian   the  first;  alidoinen  not  mi 

marked      2 

2. — Abdomen  yellow;  first  Mefjment,  exeei)t  the  lateral  angles,  black,  each  of  flie  t'ol 
lowing  segments  with  two  narrow  black  bands,  t]fe  one  on  the  anterim- 

m.-irgin  entire,  the  others  int«Mrui>f ed hamifera 

Abdomen  black,  with  yellow  cro.ss-liauds 3 

3, — l''irst  and  si'cond  abdominal  segments  wholly  black,  third  with  a  posterior  crnss- 
band,  fourth  with  two,   the  anterior  one   interrnpted  ;   abdomen  broadly 

oval fusca 

First  segment  with  a  yellow  side  spot,  the  tVdlowingeach  with  two  cross-bands,  4 
4. — I'irst.  third,  and  t'.fth  cross-bands  interrn|)ted  (or  snb-internipted)  the  latter  twc 

distinctly  dilated  on  the  sides 5 

First  aii<l  third  cross-bands  entire longicornis 

5. — Plenra'  with  five  yellow  spots  besides  the  humeral  and  siibalar  ones;  front  of  fi- 

male  with  a  black  stripe interrupta 

Plenrie  with  only  fours])ots  besides  the  humeral  and  subalar  ones  ;  front  of  fema!>' 
yellow  across  tlu'  middle ;  sciitellum  with  a  yellow,  disconnected  spot  en 
each  side liturata 

•  2'n-(7,of,  mountain  :  ,uvia,  fly. 


i". 


'U 


SYNOPSIS    OF    NORTH    AMERICAN    UTBPHID^. 


245 


I* 

'  9 


Spilomyia  longicornia. 

Spiloinjiia  longicornin  Locw,  Ceutur.,  x,  49. 

Habitat. — Illinois,  Pennsylvania,  District  of  Columbia,  New  EnKlaiuIl, 
Texas,  Kiiuaas  (O.  S.) 

3,5.  LtMifjtIi,  1 1  to  13'" '.  Eyes  of  miiK?  eouti^'iioiis,  vortical  trian^xle 
on  the  upper  half  black,  Im'Iow  yellow;  froiktal  triaufjle  yellow,  with  a 
large  triangular  black  spot  above  the  antenna}.  Front  in  female  yellow 
on  the  sides,  with  a  black  strii)e  broad  below,  attenuated  above,  vertex 
Itlack.  Antenna'  l)rownish  black, sometinu's  partly,  neverwholly, brown- 
ish red,  first  two  joints  somewhat  elongate,  arista  luteous.  Face  yellow, 
with  a  median  stripe  attenuate  above,  and  a  narrow  stri|>e  from  the 
eyes  to  the  oral  margin,  on  the  (dieeks,  black.  Thorax  black,  humeri, 
and  a  rounded  spot  to  the  inner  side,  a  /\-shaped  sjjot  in  iVont  of  the 
scutellum,  au<l  a  vittula  running  from  each  postalar  calhtsity  to  near 
the  suture,  and  then  bent  inwards,  yellow,  soinetinies  also  a  small  yellow 
>l)ot  above  the  suture  in  front  of  the  root  of  the  w  ings.  IMeurje  with 
tive  yellow  spots  beside  the  humeral  and  sub-alar  ones;  an  elongate  one 
on  the  meso  pleura^  and  one  below  on  the  sterno-])leura>,  one  just  above 
the  anterior  coxie,  one  on  the  i)tero  i)leurie,  and  a  broader  one  behind, 
iu'Iow  the  tegulte,  the  three  latter  nearly  coalescent.  Margin  of  scutel- 
liuu  yellow.  Abdomen  black  opaque,  second,  third,  and  fourth  seg- 
ments each  with  two  narrow  ellow  biuuls  coniUH'ted  by  the  yellow 
lateral  iuirgins;  first  band  dilated  on  the  sides,  the  third  and  fifth 
usually  very  narrowly  interrupted.  lIypoi)ygium  yellow;  in  the  female 
the  tifth  segment  black,  with  a  narrow  yellow  border.  Legs  yellow; 
trout  tibite  except  the  base,  and  the  front  tarsi,  black;  hind  femora 
sometimes  darker  towards  the  end ;  apex  of  hind  tibiiP  and  the  tarsi 
(M'hraceous.  Wings  sub-hyaline,  in  front  brownish  ;  last  section  of  sixth 
vein  nearly  as  long  as  the  posterior  basal  cross-veiu. 

Spilomyia  liturata,  n.  .sp. 
Ilahifat. — New  Mexico  ! 

2  .  Length,  14""".  Antennte  brc/wnish  red,  elongate ;  first  joint  as  long 
as  the  third,  second  joint  a  half  longer  than  the  first.  Face  bright  yel- 
low, with  a  slender  black  striiu',  not  reaching  quite  to  Hie  antenn*  ; 
tiont  like  the  face,  in  the  middle  with  a  black  stripe,  broader  below, 
very  narrow  just  below  the  black  vertex.  Dorsum  of  thorax  nearly 
opaque  black,  with  bright  yellow  markings,  as  follows :  a  spot  on  the 
liiuneri,  and  one  of  nearly  the  sanu'  size  on  the  inner  side  of  each,  i)ost- 
ahir  callosities,  extending  as  a  slender  vittula  forwards,  the  anterior 
tiid  of  which  is  curved  inwards,  a  spot  on  each  side  of  the  scutellum.  a 
large  oval  spot  on  the  meso-i)leur.TB,  a  smaller  rounded  one  below  on  the 
sterno-pleurae,  one  of  about  the  same  size  on  the  sides  of  the  metanotum. 
and  a  smaller  one  above  the  front  coxae.  AbdonuMi  nearly  opaque  black, 
with  two  yellow  cross-bands  on  the  second,  third,  and  fourth  segments; 
the  first  cross-band  of  each  segment  is  rather  broad,  strongly  dilated  on 


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246  BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 

the  sides,  aud  only  sub-interrupted  in  the  middle ;  the  posterior  margins 
of  the  second-fifth  segments  with  the  bands  of  equal  width  thioughout, 
not  interrupted.  Legs  yellow  ;  the  four  hind  tibiae  at  the  tip  juul  their 
tarsi  reddisli,  the  front  tibiae,  excej**^  the  base,  and  their  tarsi  black; 
hind  femora  broad'y  blackish  on  the  posterior  side.  Wings  with  a 
brown  anterior  border,  nearly  hyaline  behind. 

One  specimen.  New  Mexico  (G.  V.  Gaumer).  The  present  species 
is  nearly  related  to  longicornin  and  interrvpta,  but  is  at  once  disti'iguish- 
able  from  the  former  by  the  longer  antennae ;  from  the  latter  by  the  au- 
tennae  being  a  little  longer,  by  the  abdominal  bands  'jeing  entire,  or  not 
distinctly  interrupted ;  from  both  by  the  spots  on  the  pleurae,  and  the 
greater  width  of  the  abdominal  bands. 

Spilomyia  interrupta.    (Piute  XII,  fig.  4.; 

Spilomyia  interrupta  Williston,  Proc.  Am.  Phil.  Soc.,xx,327. 

habitat. — Washington  Territory ! 

9  .  Length,  1,'J  to  14""".  Closely  allied  to  longicornis,  but  differs  in  the 
bauds  of  the  abdomen  being  a  little  broader,  the  first,  thini,  and  fifth 
very  distinctly  interrupted,  and  the  t:vo  latter  more  dilated  on  the  sides, 
in  the  fifth  segment  in  the  female  being  in  large  part  yellow,  in  the 
presence  of  a  small  yellow  spot  on  the  sides  of  the  dorsum  above  tlie 
meso-pleurje,  in  the  spots  of  the  jdeurse  being  smaller  and  distinctly  sep 
arated  from  each  other,  not  coalescent,  and  in  the  antennae  beinj;  :i 
little  longer.  The  cheeks  are  <larker,  and  the  hind  femora  on  the  pos- 
terior side  near  the  end  may  be  quite  black.  The  wing  is  broader,  an«l 
the  last  section  of  the  sixth  vein  is  distinctly'  shorter.  All  of  these 
differences  may  not  be  persistent  in  a  large  nnmber  of  speciniens.  but 
they  are  certainly  sufficient  to  show  that  the  si)ecie8  is  distinct. 

Two  specimens,  Washington  Territory.  The  relationship  of  (V.-  Ion- 
(fieornis,  S.  liturata,  and  8.  interrupta  with  the  European  S.  ftaltuum  and 
S.  diophthalma  is  remarkably  close. 

Spilomyia  fusca. 

Spilomyia  fusca  Loew,  Centur.,  v,  34. 

Hahitat. — Pennsylvania,  Massachusetts,  New  Hami)8hirc,  Georgia. 
Canada ! 

<?,  9.  Length,  IG  to  17"'".  Head  light  yellow,  somewhat  shining,  and 
with  short,  sparse,  whitish  pile;  vertex,  an  incomidete  frontal  stripe  be- 
low, and  an  oval  si)Ot  on  the  face,  black.  Antenna^  reddish  black,  the 
firsttwo  jointsoften  quite  black.  Occiput  black, orbits  whitish  pollinose. 
Thorax  opaque  brownish  black,  with  yellow  markings  asfollows:  hun)eri. 
a  rounded  spot  at  their  inner  side,  two  oval  spots,  forming  an  obtuse 
angle,  in  front  of  the  scutelluui,  a  vittula  on  each  side,  extending  from 
the  post-alar  callus  and  bent  inwards  in  front  to  meet  the  suture,  inargiu 
of  scutellum,  a  large  meso-i)leural.  a  smaller  sterno-pleural  and  another 
above  the  base  of  the  front  coxte.  Abdomen  liroadly  oval,  brownish 
black,  viny  shortly  black  pilose ;  third  segment  with  a  yellow  band  ou 


■',  w 


1 


SYNOPSIS   OP   NORTH   AMERICAN    SYRPHIDiS. 


247 


•the  posterior  bonier,  and  on  each  side  ntar  the  middle  with  a  small  triau- 
y;ular  spot;  fourth  segment  with  two  fasciie,  the  anterior  one  narrowly 
interrupted,  the  posterior  one  rather  broad,  on  the  hind  margin.  Hypo- 
pygium  wholly  light  yellow.  Venter  blackish  brown,  the  incisures  light 
yellowish.  Femora  blackish,  brownish,  and  yellow,  varied ;  front  tibiaj, 
except  the  yellow  base,  brown  or  black ;  middle  and  hind  tibia?  light 
yellow,  the  tip  dark  ochraceous;  front  tarsi  black,  middle  and  hind  tarsi 
like  the  tip  of  their  tibia?.  Wings  sub-hyaline,  the  anterior  part  brown. 
Xuaierous  speciiniens.    The  pile  of  the  top  of  the  head  is  blackish. 

Spilomyia  hamifera. 

Spilomyia  hamifera  Loew,  CViitur.,  v,  ;$:{. 

Habitat. — Pennsylvania,  Virginia,  Florida,  Kentucky  (Loew,  O.  S.), 
New  Hampshire! 

2  .  Length,  17""".  Head  light  yellow,  front  and  face  narrowly  black 
vittsite,  the  stripes  more  or  less  obsolete  on  the  ujjper  i)art  of  each; 
iheeks  with  a  brownish  black  stripe.  AntenuiC  brownish,  or  brown, 
ffith  the  margins  of  the  third  joint  darker.  Vertex  black ;  occiput 
blackish,  the  orbits  with  whitish  pollen.  Thorax  black,  with  yellow 
markings  as  follows:  on  the  anterior  margin  of  the  dorsum  with  four 
spots,  a  vittula  reaching  from  the  posterior  angle  to  the  suture,  curved 
inwards  in  front,  and  two  spots  in  form  of  an  inverted  V  in  front  of  the 
scutellum.  On  the  pleuraj,  beside  the  humeri,  two  large  sjwts  and  a 
more  whitish  one  above  the  base  of  the  front  coxju,  sometimes  obsolete. 
Sc'utellum  yello'  ,  the  base  brownish  or  black;  metanotum  black,  with 
I  yellow  spot  on  each  side.  Abdomen  yellow;  first  segment,  except 
tlie  lateral  angles,  black ;  ea«h  of  the  following  segments  witli  two  nar- 
row black  bands,  the  one  on  the  front  margin  entire,  the  median  one 
interrupted,  or  subinterrupted.  The  black  band  in  front  of  each  seg- 
ment is  narrowed  near  the  lateral  margin  by  a  more  or  less  large  pro- 
cess from  the  yellow  behind.  Venter  black,  posterior  margin  of  each 
segment  yellow.  Legs  yellow,  front  tibiae  and  tarsi  black.  Anterior 
portion  of  wings  brown,  posterior  hyaline. 

One  specimen,  White  Mountains,  New  Hampshire,  July  31. 

Spilomyia  pleuralis,  u.  sp. 

Habitat. — Mexico ! 

(J .  Length,  14""".  Face  yellow,  a  slender  stripe  in  the  middle,  not 
reaching  the  antennoB,  and  a  slender  vittula  on  each  cheek  black.  An- 
tennae dark  brown,  the  three  joints  of  nearly  equal  length.  Frontal 
triangle  shining  black,  narrowly  along  the  eyes  and  on  each  si«le  below 
white  pollinose.  Dorsum  of  thorax  black,  with  the  following  light  yel- 
low marks:  the  humeri,  a  small  si)ot  on  the  inner  side  of  each,  a  sniidl 
spot  near  the  outer  end  of  the  suture,  a  vittula  running  from  each  post- 
alar  callus  and  contiiuied  inwards  as  a  pollinose  spot,  and  two  slender 
vittulae  in  the  shape  of  an  inverted  V  in  front  of  the  scutellum  ;  scutel- 
'uni  black,  narrowly  margined  with  yellow;  pleura*  light  yellow,  the 


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BULLETIN   31,    UNITED    STATES   NATIONAL   MUSEUM. 


Hutures  black.  Abdomen  black,  lightly  shining,  in  shape  broadest  at 
basse  of  the  second  segment,  then  diminishing  in  nearly  a  straight  Hue 
on  each  side  to  the  tip  of  the  fourth ;  second  segment  with  a  small  yel- 
low  spot  on  each  side;  the  second,  third,  and  fourth  each  with  a  larger, 
suh- triangular  spot  on  each  side;  second  and  third  segments  each  with 
a  slender  posterior  cross-band,  that  on  the  third  narrowly  interrupted 
in  the  middle;  fourth  segment  with  a  large  spot  on  each  posterior  an 
gle,  forming  a  broadly  interrupted  cross-band.  Legs,  including  tlit 
c«  ar^  light  yellow,  the  tips  of  front  and  hind  tibiae  and  their  tarsi 
brown,  hind  femora  broadly  black  along  their  upper  surface  except  at 
their  base.  Wings  hjaline,  with  the  usual  brown  border  in  front. 
One  specimen,  in  the  Osteu  Sacken  collection  at  Cambridge. 

Spilomyia  (Miztemyia)  quadrifasciata.     (Plate  XII,  tig.  :i.) 

I'aragiin  quanrifaaciatm  Say,  Long's  Exped.,  Append.,  377  ;  Couipl.  Wr.,i,  257. 
PsariiH  qiuidrifaaoiatuii  Wiedemann,  Ahhc.  Zw.  Ins.,  ii,  91,  2. 
Mixteniyia  (iiiailrifasciata   Macqnart,   Hist.    Nat.  Dipt.,  i,  491;    tab.  xi,  fig.  i; 
Oaten  Saci<en,  Cat.  Dipt,  131). 

Habitat — Canada,  New  Hampshire,  Massachusetts,  Connecticut,  New 
York ! 

S,9.  Length,  12°'"'.  Vertex  black  with  whitish  pile;  below,  the  front 
of  the  female  has  a  narx'ow  yellow  stripe  of  even  width  along  the  eyes ; 
frontal  triangle  narrowly  black  immediately  above  the  antennae ;  ver 
tical  triangle  long,  yellow  in  front.  Antennre  reddish  brown  or  brown 
ish  black,  the  first  joint  reddish  or  yellowish,  moderately  elongated, 
seroud  joint  much  so,  nearly  twice  as  long  as  the  first ;  thir  1  Joint 
trapezoidal,  a  half  longer  than  wide ;  arista  yellow.  Thorax  with  a 
small  spot  on  the  humeri,  a  larger  one  to  the  inner  side,  a  slender  vittula 
above  the  wings,  two  slender  spots  in  the  form  of  an  inverted  V  in 
front  of  the  scutellum,  the  narrow  nmrgin  of  the  scutellum,  a  large 
elongate  spot  an  the  meso-pleurac,  a  large  rounded  one  on  the  sterno 
pleurae,  and  a  smaller  one,  sometimes  obsolete,  above  the  front  coxa;. 
yellow.  Abdomen  elongate,  cylindrical,  scarcely  wider  than  the  thorax, 
witii  four  yellow  bands,  the  first  broad,  conspicuous,  strongly  arcuate, 
the  convexity  in  front,  situated  on  the  second  segment;  the  second  and 
third  on  the  middle  of  the  hird  and  fourth  segments,  slender,  only  a 
little  arcuated,  the  second  narrowly  interrupted  in  the  middle,  the  third 
usually  entire  ;  the  fourth  band  on  the  posterior  margin  of  the  fourth 
segment ;  on  the  posterior  angles  of  the  second  and  third  segments 
there  is  a  small  yellow  spot,  extending  a  short  distance  narrowly  in- 
ward. The  abdomen  is  a  little  shining,  except  on  the  second  segment, 
with  a  faint  bluish  reflection ;  the  pile  on  the  hind  part  whitish.  Base 
of  hind  and  middle  femora,  basal  two- thirds  of  hind  and  middle  tibiae, 
and  narrow  base  of  front  tibiae  light  yellow;  front  legs  elsewhere  red 
dish  brown,  the  tarsi  more  black ;  tip  of  middle  and  hind  tibiae  and 
their  tarsi  light  ochraceous ;  hind  femora,  except  the  base,  nearly  black. 
Wings  elongate,  brownish  along  the  front  border,  hyaline  behind. 


Hal 


n 


SYNOPSIS   OF   NORTH   AMERICAN   SYRPHIDiE. 


249 


BpUomsria  (Mixtemyia)  ephippiom. 

Mixtemyia  ephippium  Oaten  Sackeu,  Bull. 
254. 


Buflf.Soc.  N.  S.,  ili,  70;  Cat.  Dipt.,  p. 


Habitat. — Mexico  (O.  S.)! 

(J .  Length,  12""".  Face  yellow,  with  a  brown  stripe  in  the  middle, 
which  does  not  quite  reach  the  antennae;  the  latter  brown;  second 
joint  almost  black ;  triangle  of  the  vertex  dark  brown.  Thorax  dark 
brown ;  a  brownish  yellow  angular  line  runs  from  the  scutellum,  above 
the  root  of  the  wings,  turning  inside  to  follow  the  thoracic  suture  and 
stopping  before  meeting  the  corresponding  line  on  the  other  side ;  a 
less  distinct  angular  line,  on  the  anterior  part  of  the  thorax,  begins  ou 
each  side,  at  the  yellow  humeral  tubercle,  follows  the  anterior  margin  of 
the  thorax  and  before  reaching  its  middle,  turns  backwards ;  in  the  mid 
die  of  the  anterior  margin,  between  the  two  angular  lines,  two  delicate, 
sliort  parallel  yellow  lines  are  perceptible.  Scutellum  brown  in  the  mid 
die,  with  yellow  borders.  Pleurse  brown;  a  yellow  spot  above  the  root 
of  the  front  coxae.  AbdonuMi  light  brown;  second  segment  with  an 
arcuated  yellow  stripe,  resting  with  its  middle  on  the  anterior,  with 
its  ends  on  the  posterior  m.argin,  which  is  al.so  yellow ;  the  inside  of 
the  semicircle  thus  formed,  is  dark  brown,  velvety;  the  third  and  fourth 
segments  are  clothed  with  a  fine  sericeous  down ;  the  third  has  a  dis- 
tinct tubercle  in  the  middle  and  is  margined  with  yellow  posteriorly ; 
the  fourth  is  traversed  by  a  yellow  cross-band  in  the  shape  of  an  in- 
verted V,  the  ends  of  which  do  not  reach  the  lateral  margins ;  hypo- 
pygium  brown.  Anterior  half  of  the  wings  brown,  the  posterior  liya- 
line ;  the  anal  cell,  the  second  posterior,  the  discal,  and  a  part  of  the 
tirst  posterior  cell,  as  well  as  the  whole  posterior  margin,  including  the 
ulula,  being  hyaline  (in  M.  quadrifasciata  the  second  basal  cell  and  the 
whole  portion  of  the  first  basal,  situated  behind  the  spurious  vein,  are 
also  hyaline).  Legs;  femora  dark  brown,  the  hind  ones  with  a  strong 
tooth  on  the  under  side ;  tibiae  yellowish  brown,  pale  yellow  at  the  base ; 
front  tarsi  brown ;  middle  and  hind  ones  reddish  brown,  last  two  or 
three  joints  brown. — Osten  Sacken. 

This  species,  the  type  specimens  of  which  I  have  examined  in.  the 
museum  at  Cambridge,  is  much  like  quadrifaaciata  in  general  appearance, 
but  is  easily  distinguishable. 

ADDITIONAL  NORTH  AMERICAN  SPECIES. 
Bpilomyla  pallipea  Bigot,  Ann.  Soc.  Ent.  <Ie  Fr.,  1883,  3.Vi,— Mexico. 

TEMNOSTOMA.* 

Tmmoatoma  St.  Faigeau  and  Servillc,  Encycl.  Metb.  x,  ."ilS,  1625. 
In  Btractnre  nearly  like  Spilomyia,  but  differs  in  the  hind  femora 
being  without  a  tooth  below  on  the  outer  part.    The  markings,  more- 

"Ts/iiveiy,  tocnt;  tfro/ua,  month. 


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250  BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 

over,  of  the  thorax  and  abdomen  arc  couipoHed  of  very  dense  pollen, 
and  may  be  more  or  less  effaced,  whereas  in  Spilomyia  they  are  of  to 
ground  color.  Properly  speakinf^,  these  characters  are  not  of  more  than 
subgeneric  value,  as  indeed  they  were  so  considered  by  Schiner.  Ibe 
species  are,  like  those  of  ISpilomyia,  strikingly  similar  or  identical  with 
the  European  ones. 

TABLE  OF  SPECIES. 

1. — Abdomen   with    tbree  or   four    yellow    pollinoae    croHsbanda   of  uearly  equal 

widtb bombylans 

Abdomen  broadly  oval,  with  more  than  four  crotw-bandH,  of  unequal  width         2 
2. — The  thorax  haH,  in  addition  to  the  other  spotH,  two  sepurated  onoson  each  side  ou 

the  Huture 5 

The  thorax  has,  in  addition  to  the  i>ther  spots,  only  one,  elongate  spot  on  oach 

Bide 3 

3. — t'emora  mostly  yell<)w  ;  the  distal  part  of  the  abdomen  with  broad  yellow  cross- 
bands  leaving  but  very  narrow  black  cross-bands 4 

All,  or  at  least  the  front,  femora  broadly  black ;  the  black  interrupted  cros.s- 

bands  of  distal  portion  of  abdomen  broader aequale 

4.— Scutellimi,  except  the  base,  densely  yellow  pollinose pictuliim 

Scutellum,  except  the  baise,  shining  metallic excentricum 

5. — Second  segment  of  abdomen  with  a  broad  anterior  cross-band,  distal  segments 

with  three  transverse  black  spots altemans 

Second  segment  without  nnterior  cross-band,  distal  segments  with  a  broad  inter- 
rupted black  cross-band  ;  pile  of  scutellum  black    venustum 

TemnoBtcma  bombylans.     (Plate  XII,  tig.  6.) 

Mihsia  bombylans  FaV>riciu8,  Syst.  Antl. ,  189, 8 ;  Panzer,  Fauna,  viii,  11 ;  Meigen, 

Syst.  Bes(!hr.,  iii,  5>:<3, 15  j  Macquart,  Hi <t.  Nat.  Dipt.  1, 534, 6. 
Mileaia  Zefleratedlii  Fallen,  Syrpli.,  8, 1. 

TemnoBtoma  bombiflatm  8t.  Fargeau  and  Serville,Encycl.  Math., x, 518 
Z>oro8 /}fl/.iyra«  Walker,  List,  etc.,  iii, 577. 
Spilomyia  bombiflans  Schiner,  Fauna  Austr.,  i,  ;J65. 
Temnoatoma  ohsciira  Loew,  Centur.,  v,  35. 
Temnontoma  liahjraa  Osten  Sacken,  Cat.  Dipt.,  J38,2.'J3. 

Habitat. — New  York,  Connecticut,  White  Mountains,  Pennsylvania! 

cf,  9.  Length,  10  to  11  "".  Face  black,  shining,  covered  with  dense 
yellow  pollen  on  tiie  Hi«le8;  cheeks  bare  and  shining  black.  Frontal 
triangle  black,  clothed  with  yellow  pollen,  except  above  the  antennae. 
Eyes  in  the  male  narrowly  separated.  Front  in  female  lightly  pcyllinose 
on  the  sides.  Face  of  male  usually  with  a  slight  convexity  in  the  mid- 
dle, sonjetimes,  however,  (piite  straight  or  even  gently  concave  through- 
out, as  in  the  female.  Antenna?  varying  from  light  yellow  to  quite 
brownish.  Thorax  nearly  o|)a(|ue  black;  humeri,  the  suture  on  each 
side,  a  snuill  spot  above  the  wings,  sind  a  vittula  in  the  niesopleurae. 
thickly  yellow  pollinose.  Abdomen  black,  but  little  shining,  of  nearly 
equal  width  throughout,  a  little  oval  in  the  female  ;  the  second,  third, 
and  fourth  segments  (in  the  female  the  fifth  also)  with  a  complete  yel- 
low band,  moderately  arcuated,  the  convexity  approaching  the  front 
margin  of  the  segments ;  all  of  the  bands  n)argined  with  opaque  black. 


SYNOPSIS   OF   NORTH   AMERICAN    SYRPHID2E. 


251 


Hj'popyRium  shining  black.  Front  legs  black,  immediate  base  of  fem- 
ora, knees,  and  base  of  tibia),  yellow ;  middle  and  bind  femora  black 
except  base  and  tip  ;  bind  tibiae  usually  with  abroad  blackish  preapical 
ring ;  tip  of  middle  and  hind  tarsi  frequently  blackish.  Wings  hyaline 
in  front,  towards  the  base  more  reddish,  beyond  brown. 

Twenty-five  specimens,  mostly  caught  about  blossoms  of  Cornus  psm- 
iculata  in  the  latter  part  of  June.  New  York  (Professor  Gomstock), 
Pennsylv.'S'.iia  (Keen). 

In  his  description  of  T.  ohscura,  Loew  says :  "AT.  bombylanti,  cui 
KJniillima,  fact'i  tuberculo  niinuto  quidem,  sed  manifesto  differt."  But, 
unfortunately,  although  the  facial  tubercle  or  convexity  is  not  incon- 
spicuous in  some  specimens,  in  others  it  is  absolutely  wanting.  From 
this  fact,  and  because  they  agree  throughout  with  the  descriptions  of 
the  European  specimens,  I  must  agree  with  Jaennicke  (Neue  Exot. 
Dipt.,  p.  4)  in  considering  the  species  the  same. 

TemnoBtoma  pictulum. 

Habitat. — Pennsylvania ! 

9  .  Length,  12  to  14""".  Head  black;  face  and  front  thickly  clothed 
with  golden-yellow  ])ollen,  a  medi.an  strii)e  reaching  from  the  vertex 
over  the  base  of  the  antennae  to  the  oral  margin,  and  the  cheeks,  bare, 
shining.  Antennae  wholly  light  yellow.  Thorax  black,  with  bright 
golden  pollinose  markings  as  follows :  A  spot  on  the  humeri,  an  inter- 
rupted baud  on  the  suture,  a  large  oval  spot  in  front  of  the  post  alar 
callus,  two  spots  of  about  the  same  size  as  the  last  in  front  of  the  scu- 
tellum,  nearly  confluent,  the  scutellum,  except  the  base,  a  spot  on  the 
meso-pleurae  and  one  on  the  sterno-pleurae.  Abdomen  golden-yellow 
opaque ;  first  segment,  the  anterior  margin  of  the  second,  and  the  very 
slender  front  margins  of  the  third  and  fourth,  a  cross-baud  on  the  mid- 
dle of  second  segment,  not  reaching  the  margins,  similar,  but  success- 
ively narrower  ones  (almost  linear  on  the  last),  on  the  following  seg- 
ments, black.  Legs  yellow ;  front  tibiae,  except  the  base,  and  front 
tarsi,  deep  black.  Wings  brown  along  the  front  border,  sub-hyaline 
behind. 

Two  specimens,  Pennsylvania  (Mr.  Eugene  L.  Keen).  Is  most  nearly 
allied  to  r.eajceH^ncMW,  but  the  scutellum  is  golden  pollinose,  not  shining; 
the  spots  on  the  thorax  are  larger,  and  there  are  two  separated  spots 
in  front  of  the  scutellum  instead  of  one  triang-ilar  one;  the  median 
black  bands  of  the  abdominal  segments  are  not  distinctly  interrupted 
iu  the  middle,  the  front  of  the  female  is  broader  above  and  the  insect 
is  smaller. 

TemnoBtoma  excentrlcum. 

Mileaia  excmtrica  Harris,  Insects  of  New  Eng.,  injur,  to  Veget. ;  Osten  es,oken, 

ibid,  Urd  ed.,  609,  fig.  267  (male). 
Temnoatoma  exceiitrica  Oaten  Sacken,  Cat.  Dipt.,  138,  253  (male). 

Habitat. — Massachu.setts,  Tennessee!,  Illinois  (O.  S.). 


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252 


BKLLETIN    13,    UNITED   STATES   NATIONAL    MUSEUM. 


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9  .  TieiiKth,  C"""*.  Size  and  markinf^s  of  head,  thorax,  and  wings  as  in 
T.  neqicale^  the  legs  "ochre-yellow,  except  the  shanks  and  feet  of  the 
tirst  pair,  which  are  black"  (Harris).  Abdomen  mostly  yellow,  first 
segment  black,  an  anterior  fascia  and  a  middle  one  mo<lerateIy  broad 
on  8«'con«i,  a  very  narrow  interrnpted  black  fascia  on  third,  fourth,  and 
fifth,  and  the  hind  margins  of  all  the  segments  black.  The  narrow 
faHcise  might  be  better  described  as  pairs  of  narrow  transverse  spots. 
The  yellowish  triangular  spot  in  front  of  the  scutellum  is  more  couspic 
uouM  than  in  my  specimens  of  T.  aequale. 

About  the  present  species  there  has  been  some  confusion,  and  I  iini 
not  at  all  sure  that  I  can  definitely  settle  it.  The  three  or  four  species 
are  very  closely  allied,  and  only  a  considerable  amount  of  material  will 
enable  one  to  determine  with  certainty  their  true  relations.  The  diflFer 
ences  only  consist  in  the  color  of  the  femora,  an  addition.al  sjwt  on  the 
thora<!ic  suture,  and  the  abdominal  bands.  The  jiresent  species  is  ap 
paiontly  the  same  as  the  male  that  Osten  Sacken  described  in  Harris' 
Report  (3rd  ed.,  j).  609),  the  female  of  which  he  afterwards  decided  (Cat. 
Dipt.,  p.  253)  does  not  belong  with  it,  and  which  I  have  called  T.venm 
turn.  The  chief  evidence  that  1  have,  however,  is  a  specimen  without 
abdomen,  kindly  loaned  me  by  Mr.  S.  Herishaw,  of  the  Boston  Society 
of  Natural  History,  bearing  the  label  "179— T.  W.  H.,"and  which,  most 
probably,  was  a  specjimen  used  by  Harris  when  he  made  the  briel"  dc 
scription.  This  specimen  has  the  single  elongate  sutural  spot  on  eaiii 
side,  so  that  it  cannot  be  T.  alternans;  the  legs  are,  however,  as  he  de- 
scribed them — that  is,  yellow,  except  the  front  tibiee  sind  tarsi,  whilt^ 
aequale,  iiccording  to  Osten  Sackcn's  an<l  my  own  observations,  always 
has  the  femora  more  or  less  black.  A  single  specimen  that  I  haw 
from  Tennessee  agrees  both  with  this  and  the  males  (^)8ten  Sacken  de 
.scribed,  the  abdomen  being  as  I  have  described  it  above.  Hence  1 
think  that  the  conclusion  here  given  is  the  correct  one;  at  least  we  have 
no  evidence  to  gainsay  it.  That  it  is  nothing  more  than. a  variety  of 
aeqtiale  I  am  not  prepared  to  say;  in  such  case  this  name  vill  have  pre- 
ce»lence. 


«  ti 


TemnoBtoma  alternans.    (Plato,  XII,  tigs.  7,  7a. ) 
Temnoatoma  alternans  Loew,  Centur.,  v,:J7. 

Habitat. — Canada,  Maine,  New  Hampshire,  Connecticut,  Pennsylvania 
Massachusetts!. 

$  ,  9 .  Length,  12  to  15""'.  Head  thickly  golden  yellow  poUinose ;  the 
vertex,  a  median  frontal  and  facial  stripe,  and  the  cheeks  shining  black ; 
pile  of  the  vertex  black.  AutennsB  reddish  or  yellow.  Face  gently  con 
cave  in  the  middle.  Thorax  brownish  black,  a  little  shining;  the 
humeri,  a  rounded  spot  at  outer  end  of  suture,  and  a  smaller  one  toward 
the  middle,  a  vittula  running  from  the  post-alar  callus  to  near  the  suture, 
a  triangular  spot  in  front  of  the  scutellum,  and  a  large  elongate  spot  ou 
the  mesopleurse,  bright  yellow,  the  color  due  to  pollen,  which  in  rubbed 


■p 


il 


SYNOPSIS   OP   NORTH    AMERICAN    SYRPHIU^. 


253 


specimens  not  infrequently  is  greyish,  or  even  obsolete.  A  square  spot 
lit  the  inner  side  of  the  humeri  deep  opitque  black;  in  the  middle  of  the 
dorsum  in  front,  a  broad,  faintly  grayish,  pollinose  stripe.  Scutellum 
opaque  at  its  base,  broadly  metallic  shining  green  on  its  border ;  pile 
blackish.  Abdomen  oval,  golden  yellow  ami  black,  o]>a(pie;  first  seg- 
ment black;  second  segment  black  with  two  yellow  cross-bands,  con- 
nected on  the  lateral  margins,  the  tirst  narrowly,  the  second  very 
broadly  inteirnpted;  third  segment  with  a  median  black  cross-band, 
dilated  in  the  middle  diamond  shape<l,  sometimes  cut  oQ'  from  an  oval 
spot  on  the  sides,  the  tirst  band  interrupted  by  a  linear  space  ;  fourth 
and  fifth  segments  with  three  small  black  spots  each,  the  middle  one 
larger,  on  the  Iburth  segment  sometimes  coalescent;  margins  of  the 
segments  narrowly  black.  Legs  reddish  yellow;  front  tibias  (except 
the  base)  and  their  tarsi  deep  black ;  front  femora  at  ttieir  base,  and 
sometimes  the  other  pairs  below  near  the  base,  more  <»r  less  black. 
Wings  brownish  in  front,  nearly  hyaline  behind,  the  third  vein  lM*y<md 
the  cross  vein  broa«lly  hyaline  along  its  sides. 

Eight  specimens.  One  specimen  from  Pennsylvania  (Keen)  has  the 
tirst  yellow  cross-band  of  the  abdomen  more  broadly  interrui)ted  than 
the  second,  the  yellow  each  side  not  reaching  a  third  of  the  way  across; 
the  base  of  all  the  femora  are  also  more  blackish. 

TemhoBtoma  venustum,  n.  sp. 

TemnoHloma  tixcentriva  Osteii  8iickeu,  llarriH'  liis.  Iiij.  to  Vfjiftiiiion,  ;{(!.  cd.,  p. 
010;  Cat.  Dipt.,  p.  253,  uoto  (fciimU'). 

Habitut. — Massachusetts,  Lake  Sujierior  (O.  S.),  N»'w  Hampshire. 

9 .  Length,  15""".  Very  closely  allie<l  to  T.  aeqitaU,,  but  differs  in 
having  two  yellow  spots  on  the  suture  (like  T.  olternans)  on  eiicli  side. 
The  pile  of  the  scutellum  is  black,  the  second  abdominal  st';,Miient  lacks 
the  anterior  cross-band,  and  the  hind  one  is  confined  to  Ww  sides,  the 
hiteral  margins  of  the  segment  also  being  narrowly  yellow;  both  cross- 
bands  of  the  third  segment  are  narrow,  the  anterior  one  of  the  fourth 
segment  also.  The  remaining  ones  are  broader,  and  the  black  is  inter- 
rupted in  the  middle  of  the  fourth  and  fifth.  In  my  single  specimen 
the  two  hind  femora  are  brown,  the  front  one  black,  except  the  tip. 

One  specimen,  White  Mountains,  New  Hampshire  (S.  Ilenshaw). 

TemnoBtoma  aequale.  • 

Temuoaloma  aequalia  Lomv,  Ceutur.,  v,  'M. 

Habitat. — British  North  America  (Lw.),  New  England,  Colorado! 

S  ,9.  14""".  Head  yellowish-white  pollinose,  vertex,  median  frontal 
and  facial  stripe  and  cheeks  shining  black,  vertical  triangle  bhick,  be- 
low pollinose.  Antennae  reddish  or  brownish.  Thorax  black,  but  little 
shining,  in  front  in  the  middle  a  little  grayish ;  humeri,  the  sutures, 
supra-alar  vittula,  and  an  elongate  spot  on  meso-pleura,  yellowish  gray. 
Scutellum  metallic  shining,  its  base  narrowly  opaque ;  pile  yellowish. 
Abdomen  black,  moderately  shining,  the  segments,  except  the  first, 


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254 


HULI.KTIX    31,    UNITED    STATKH    NATIONAL    MISKIM. 


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ouch  with  twoyt'llowJHh  white  oroHN-handH ;  on  the  Hecoiid  segment,  the 
first  iH  bruud,  nearly  entire,  the  HeconU  nurroM*,  HoinetinieM  confined  to 
the  sidcH  of  the  hind  border;  third  Negment  with  botli  entire,  the  hind 
one  the  narrower;  fourth  and  fifth  .segments  Hiniilar,  botli  of  nearly 
equa!  width  and  connected  in  the  middle ;  hypopygiuni  pitchy.  I'ront 
legN  black,  the  knees  luteous,  sometimes  the  outer  part  of  femora  also; 
middle  and  hind  femora  usually  blackish,  except  the  ends,  sometinii's 
only  brownish  on  the  base;  middle  and  hind  tibiuMind  tarsi  reddisii 
yellow,  the  last  Joint  of  tarsi  darker.  Wings  brovvnish  in  front,  hyaline 
behind. 

Ten  speci.nens,  Dr.  Dinimock  (July  L'5,  White  Mountains),  E.  Burgens, 
Professor  Uiley  (VetA  Pass,  Colo.). 


1 


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MILESIA. 

Milena  Littreille,  Hint.  Nat.  Crii.st.  Ins.,  xiv,  :<«!!  (1804),  Fabricius. 
Sphixea  Rondaiii,  Di])t.  Itnl.  I'rodr.,  ii,  18'>. 

Very  large,  robust,  nearly  naked  species,  black  or  yellowish  brown, 
with  yellow  thoracic  and  aiidomiuiil  n)arkings.  Head  hemispherical, 
broader  than  thorax.  Antenna*  not  long,  porrect,  inserted  on  a  pro- 
jection of  the  front,  third  joint  rounded  ;  arista  bare.  Face  concave 
in  proHle,  shorter  than  the  front,  moderately  projecting  below.  Eye.s 
bare,  contiguous  in  the  msde.  Thorax  large  and  robust,  with  yel 
low  markings;  scutellum  in  large  part  yellow.  Abdomen  more  tliiiii 
twice  as  long  as  thorax,  only  a  little  broader  in  the  middle,  tJMttened. 
with  yellow  bands.  Legs  strong,  hind  femora  elongate,  below  near  outer 
end  with  a  tooth-like  projection.  Wings  comparatively  narrow,  marginal 
cell  closed,  third  vein  somewhat  bent  into  first  posterior  cell ;  anterior 
cross-vein  beyond  the  middle  of  the  discal  cell,  very  oblique,  the  sixtli 
vein  beyond  the  anal  cell  bent  8-like.  Type,  M.  crabrmifonnin  Fab.. 
Europe. 

The  genus  Milenia,  as  employed  by  Latreille,  included  a  large  number 
of  heterogeneous  forms.  St.  Fargeau  and  Serville,  in  182r>,  restricted 
the  genus  to  iiu;lude  only  our  present  species  of  Milesia  and  ISpiloninUi, 
in  the  sense  here  used ;  for  the  species  with  unarmed  feniora  and  open 
marginal  <;ell  they  ])roposed  the  name  Temnostoma.  In  1803,  a  year 
before  the  origin  of  Milesia^  Meigen  had  proposed  Spilomyia,  based  upon 
species  with  armed  hind  femora  and  open  marginal  cell,  in  1.S38. 
however,  he  rejected  both  SpHomyia  and  Temnontoma^  and  included  al! 
their  specico,  together  with  the  species  with  closed  marginal  cell  ami 
toothed  femora,  under  Milesia. 

Later,  Rondani,  overlooking  the  name  proi)osed  by  Meigen,  based 
Milesia  uijon  the  very  species  to  which  Spilomyia  had  been  previously 
given,  and  the  species  with  the  closed  marginal  cell  he  call<  <l  Sphixea. 
while  for  the  species  previously  separated  by  St.  Fargeau  and  Serville 
as  Temnostoma  he  gave  the  name  Calliprobola.    It  may  be  a  question 


SYNOPSIS   OF    NORTH    AMERICAN    SYRPHIDifl. 


255 


with  some  whef  er  or  not  .such  a  diviHi<»ii  of  th«*  hwterotjeiieous  m'nuH 
of  Latreille's  hIiouUI  not  be  actiepted.  lUit  I  a{jre«^  fully  with  Srhiiier, 
who  protvHtH  aijaiiiNt  tlu*  use  of  a  new  name  when  an  older  one  stands 
perfe(5tl.v  at  our  disposal.  It  is  true  tliat  none  of  the  speeies  n«>w  in- 
eluded  in  the  jjenn.s  Milexia  were  known  to  Katreille  at  the  time  his 
iXenus  wan  named.  Fahrieius,  a  year  later,  <'iian^'ed  the  name  of  Siirplnix 
cmhronij'y,  niH  Fab  (Kntom.  Syst.,  iv,  2!)!»)  t<»  MilrHiii,  and  the  name 
was  adopted  by  Latreille  in  his  later  work  (den.  Crust.,  iv,  ,i:V2).  Ac- 
cordinj;  to  the  strict  canons  of  modern  nomentHature  a  );enus  (;aiinot  be 
liased  upon  a  species  unknown  to  its  author  at  the  time  of  its  erection, 
but  MUenia  of  Latreille  «!an  hardly  be  said  to  have  had  any  type,  and 
if  the  name  is  retained  at  all  it  should  be  given  to  tho.se  spe(;ies  that 
were  first  restricte«l  by  any  author.  This  was  done  by  St.  I'^argeau  and 
Serville,  they  restricting  it  to  four  species,  two  of  which  had  Iummi  jtre- 
viously  included  under  Spihmyia  by  Meigen.  It  seems  (pute  useless 
and  very  contusing  to  retain  the  name  of  Sphirea,  as  is  done  by  Bigot. 

"Southeastern  Asia,  and  especially  the  East  Indian  Archipelago, 
seems  to  be  the  real  home  of  this  luindsome  genus.  Thirteen  species 
from  the  Archipelago  have  already  been  described.  To  these  I  now  a<ld 
three  from  the  Philippine  Islands.  One  more  is  known  from  Japan. 
From  the  other  i)arts  of  the  world  I  know  of  oidy  two  European  species, 
and  one  North  American;  a  second  North  American  species  nniy  be 
merely  a  variety.  Whether  there  are  some  true  Milesice  among  the 
South  American  species  referred  by  authors  to  that  genus  I  am  unable 
to  tell.  By  all  means  there  are  not  many."  Osten  Sacken,  Diptera 
from  the  Philippine  Islands,  Berl.  Ent.  Zeitschr.,  xxvi,  121. 


I 


1 1  II' 


Milesia  omata.     (Plate  XII,  figs.  2,  2a,  2h,  S2o.) 

MuHca  lirginiensis  Drury,  Ilhistr.  Exot.  Eutoni.,  Appendix  II;  tab.  xxxvii,  f. 

«,  177;}. 
Milesia  ornata  Fabriciu»,  System.  Antl,,  188,  5,  leo.") ;  Wiedeinaiin,  Aiis.  Zw.,  ii, 

lOG,  4 ;  Macquart,  Dipt.  Exot.,  ii,  2,  81,  4 ;  tab.  15,  f.  4. 
Syrphua  trifasciatiia  IlaaHniann,  Ent.  Bcmerk.,  ii, 67, 10 ;  1799. 
Milesia  Umbipeniiis  Maf-quart,  Dipt.  Exot.,  4" ;  Suppl.,  147, 8 :  tab.  xiv,  f.  3. 
Milesia  rir(finifinsin  Wont  wood,  Drury '»  Exot.  Entoin.,'2d  ed.,  vol.  ii,77,  1H:{7, 
Sphnxeafulvifrons  IVv^nt,  Annalos  Soc.  Ent.  Fr.,  1884, 341. 

Habitat— New  England,  Illinois,  Maryland!,  Florida,  Texas,  Kansas, 
Gnadeloui)e  (Macq.). 

(?  ,  9  .  Length,  18  to  21'"'".  Face  light  yellow,  thickly  covered  with 
similar  pollen  and  pile,  shining  in  the  middle,  gently  concave;  <!heeks 
narrow,  shining  in  front,  near  the  orbits  with  a  black  spot;  antenn:e 
situated  below  the  middle  of  the  head  in  profile.  Frontal  triangle  in 
male  like  the  face,  vertical  triangle  bhujk,  yellow  before  the  ocelli,  long, 
acute,  the  eyes  contiguous  for  a  short  <listance  near  the  middle  of  the 
space  between  vertex  and  base  of  antennae.  Front  in  female  convergent 
toward  the  vertex,  yellow,  with  a  black  stripe  reaching  from  vertex  to 
base  of  antennae.     Antennsp  light  ferruginous.     Eyes  bare,  occiput 


.11 


11 


' 


I    f 


I'' 


\   f 


256 


BULLETIN   31,    UNITED   STATES   NATIONAL    MUSEUM. 


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m 


i 


h 


i 


black,  yullow  near  thn  mouth,  posterior  orbits  broadly  yellow  polli- 
noHe.  Thorax  black,  but  little  nhiniDg,  with  a  slight  greenish  reflec 
tlon,  with  three  broml  yellow  tascite,  the  first  broad,  extending  acroHs 
on  the  anterior  margin,  sharply  interrupted  in  the  middle,  the  inner 
hind  angles  sometimes  extending  back  quite  to  the  next  fascia,  second 
band  extending  across  from  in  front  of  the  root  of  the  wings,  interrupted 
like  the  preceding;  third  band  on  the  posterior  margin,  in  front  ot  the 
scutellum, uninterrupted;  scutellum  black,  broadly  yellow  on  its  nmrgin. 
Plenrte  yellow  on  the  anterior  border  from  the  humeri  to  the  base  of  the 
anterior  coxie,  mesopleurse  with  a  vertical  and  stern o]>leuriB  with  :tu 
oval,  nearly  contiguous,  spot.  Abdomen:  First  segment  black;  second 
segment  with  a  broad  yellow  cross-band,  narrowly  interrupted  and  nar 
rowly  separated  from  a  redtlish-yellow, shining, entire  cross-band,  whi<li 
is  sinuate  on  its  anterior  border,  with  an  angular  projection  in  the  mid 
die;  third  and  fo  "th  segments  similar;  in  the  third  the  hind  cross- 
band  is  broadest  in  the  middle,  narrowed  at  the  sides;  in  the  fourth  the 
posterior  cross-baud  forms  the  larger  part  of  the  segment,  dilated  iu 
front  at  the  middle  more  sharply  than  iu  the  preceding;  narrow  margins 
of  all  the  segments,  except  the  posterior  l>order  of  the  fourth,  black; 
pile  chiefly  orange  colored,  lighter  on  the  yellow  bands.  Legs  yellow, 
with  yellow  pile;  tarsi  and  outer  part  of  hind  femora  more  reddish,  and 
the  pile  intermixed  with  black.  Wings  nearly  hyaline,  especially  in  the 
first  basal  cell,  somewhat  yellowish  or  brownish  in  front,  and  slightly 
clouded  near  the  tip. 

Eight  specimens  (Dr.  G.  Dimmock,  Mr.  8.  Henshaw,  Mr.  E.  Keen). 

,]/.  Hmhipennis  Macquart,  as  figured  by  Macquart,  shows  very  great 
ditl'erences,  in  that  the  marginal  cell  is  open  and  the  third  vein  nearly 
straight.  Osten  Sacken,  however,  from  an  examination  of  the  type 
specimen  in  Mr.  Bigot's  collection,  believed  it  to  be  nothing  more  than 
a  variety  with  dark  wings.  A  single  specimen  from  North  Carolina  (F. 
V.  Atkinson)  has  the  wings  very  dark  brown,  almost  blackish,  in  trout, 
the  scutellum  wholly  yellow  and  the  yellow  bands  of  the  abdomen  sep- 
arated only  by  slender  black  lines. 


SPHECOMYIA/ 

Sphecomyia  Latreillc,   Fain.  Natiir.  dn  Kegiie  Animal,  1825 ;   Diet.  ClaHsique 

d'Hist.  Nat.,  xv,  545, 1829. 
Tijzenhamia  Gomki,  Analec.  ad  Ent.  prov.  occid.  imiuirii  Rossici,  1852,  fasc.  i, 

p.  170. 

Moderately  large  species  with  light  yellow  markings  on  head,  thorax, 
and  abdomen ;  the  latter  with  a  median  and  posterior  band  on  segments 
2-4.  Front  very  short,  horiEontal,  concave  longitudinally.  Eyes  bare, 
narrowly  separated  in  the  male  by  the  ocellar  tubercle.  Antennal  pro- 
cess moderately  prominent.  Antennse  longer  or  shorter  than  the  head. 
Face  perpendicular,  obtusely  tuberculate,  reaching  two-thirds  of  the 

'  Sphex ;  nvta,  fly. 


!l' 


SVNOI'SIS    or    NOKTII    A.MKKK'AN    SVIM'IMD/i:. 


2r)7 


vcitical  (liiiMictrr  of  the  cyt-s  below  tlic  orhi),  lninc:itt' at  tiji.  Ahilo- 
nuMi  c.vlinilrii'a].  Lo^js  siiii|)l('.  \Viii;,'s:  Miii<,'iiiiil  <'<'ll  wido  optMi,  third 
l()ii;;i(ii(liiial  vi'iii  ^nitly  siimatt',  sniall  cross- v«'iii  (»l»li(iiic,  Joiiiiii,,'  tlio 
fourth  loiinihiiliiial  \riii  nrar  oiilrr  tliird  of  discal  cell,  last  section  of 
fouitli  vein  li;;hMy  ciiivvd,  joiniiij;'  the  thii'd  ncaf  tlic  tip.  Typcof  jicnuf 
S,  V  it  tutu  Wied. 

TAIUJ:  of  SI'FX'IKS. 

1.— Aiilfiiii.ir  very  loim,  llif  tliinl  Jniiit   mtv  Himrt vittata 

Aiili'iiiiii'  slioitiT  timii  till'  liiini,  liiMi  twd  J(  'Ills  V(  ry  Hliort,  tlio  tliiril  tiuiiHvi  r«cly 
illi|itica! .     .         2 

2. — Yi'llow   (■ii>'<,s-lijmc|s  (if  :ili(liiiiirii  vciy  ImiiKl brevicornis 

Yrlliiw  iiliiliiiMiiiiii  I  riiss-liaiids  ii;in<i\v Pattonl 

Spbecomyia  vittata. 

Cliri/.o/iijiiiii  litliitiim  Wicdriiiaiin,  Aii.sm.  Zw.  ln>*.,  ii,  87. 

I'nurun  orintlim  Wirdciiiaim,  (/;((/.,  ;»1,  1  ;    tali,  ix,   li^.  7 ;    Muoqnart  HiHt.   Nat. 

Dilit.,i,.|l(l. 
Splin  omnia  rillala   Maciiiiarl.  Dijit.,  Ksot.,!!,  ',',  IH,  I;  tal>.  iii,  fiR.  S,  I'rf.  U'li^iin 

Aiiiinal,  (,'iiv.  xiv;  Ostcii  .Saclicii,  Cut.  Dipt.,  tii'it ;    V.  v.  Kiider,  Ent.  .Sach- 

licli,  1871).  9(i. 
Tyzeuhaiiiiia  vonjiiformia  GorMki,  Auali'«ta  ad  EntoiiKinraphiuin  proviii(iai;\iii  oc- 

cidciitaliH  iiiipciii  Honsici,  1852,  fjiHC.  i,  p.  170-174  ;  tab.  1,  lig.  1  (umltO.     (V.  v. 

Hodcr,  I.  (•;. 
SphecoDiii'ia  i'c.'</)i/b;-Hii«  Wall  11  x'ly,  Vctonsk,  Acad.  Forliandl.,  1854,  p.  155;  Zi'tter- 

stcdt,  Di|il.  !^caiid.,xii,  4t!47;  ScliiiH-r,  Fauna  Austr., i,  368. 

Habitat. — New  liughind,  Southern  States,  Minnesota  1  Colorado,  Nor- 
way, Siberia. 

^ ,  5 .  Length,  11  to  12""'.  Black  and  yellow  varied.  Front  of  female 
black,  yellow  on  tlio  sides  below;  frontal  triangle  shining  black,  except 
on  the  sides,  continued  over  the  frontal  j)rocess,  and  as  a  conspicuous 
stripe  to  the  oral  margin.  Face,  light  yellow,  opaque ;  cheeks  with  a 
broad  shining  black  stripe.  Antennae  black,  much  longer  than  the 
head,  with  short  black  pile;  first  and  second  joints  of  nearly  equal 
length,  third  very  short,  rounded  on  its  end ;  posterior  orbit  broadly 
light  yellow,  narrower  above,  and  with  a  fringe  of  bright  yellow  pile  be- 
low ;  occiput  black.  Thorax  black,  nearly  opaque,  with  rather  sparse 
yellowish  pile,  and  yellow  spots  as  follows :  a  rounded  one  on  each 
humerus,  and  two  dorsal  stripes,  abbreviated  in  front  and  behind  and 
broadly  interrupted  in  the  middle,  forming  two  pairs  of  elongated  spots ; 
a  spot  on  the  meso-pleurae,  atul  one  on  t  lie  sterno-pleurre,  nearly  confluent, 
forming  an  oval  vertical  stripe.  Scutellum  yellow,  the  ritn  narrowly 
black  and  with  black  pile.  Abdomen  shining  black,  with  bright  yellow 
opaque  bands;  first,  .second,  third,  and  fourth  segments  with  posterior 
entire  bands;  second  opaque,  with  an  arcuate  Itand,  interrupted  and 
attenuate  toward  the  middle,  the  outer  ends  united  with  the  yellow  of 
the  posterior  margin ;  third  and  fourth  segments  with  bands  near  the 
middle  of  the  segments,  interrupted  by  a  linear  space  or  entire,  and  ex- 
panded at  the  lateral  margins.    Legs  reddish  yellow,  coxoe  black,  the 


I 


258 


BULLETIN    31,    TTNITED    STATES    NATIONAL    MUSEUM. 


'■Kl  i, 


hind  ones  with  a  .vcHow  spot,  the  l)a.»e  of  front  and  middle  femora  black- 
ish, of  the  hind  femora  brownish  (in  my  single  female  wholly  retldish 
yellow).  Wings  brownish,  lighter  towards  the  posterior  part;  a  dark 
narrow  spot  extends  from  near  the  tip  of  auxiliary  vein  to  the  base  of 
third  posterior  cell. 
Seven  specimens,  Connecticut,  June,  and  one  from  Minnesota  (Keen), 

Spbecomyia  brevicornis. 

Sphecoviyia  hm'iconih  Osteu  Sacken,  Western  Dipt.,  341. 

Ilahitat. — Webber  Lake,  Sierra  County,  California  (O.  S.). 

•'  3  .  Antenufe  black,  about  half  as  lon^;'  as  the  eye  from  its  upper  to 
its  lower  corner;  they  are  inserted  on  a  conical,  black  projection  of  the 
front;  joints  nearly  of  the  same  length,  the  first  cylindrical,  the  second 
subtriangular,  the  third  rounded,  somewhat  brownish;  arista  yellowish. 
Face  and  front  golden  yellow,  the  former  with  a  black  stripe  reaching 
from  the  antennae  to  the  mouth;  cheeks  black;  vertex  black;  posterior 
orbits  golden  yellow.  Thorax  black;  humeri,  two  dorsal  lines,  inter- 
rupted in  the  middle  and  not  reaching  the  scutellum,  a  large  spot  on  the 
pleurae  and  a  smaller  one  under  it  yellow ;  scutellum  yellow,  its  poste- 
rior edge  black,  beset  with  brownish  pile;  halteres  with  yellowish  knobs. 
Abdomen  yellow;  first  segment  black  at  base;  tho  second  segraec*^^  has 
two  narrow  black  cross-bauds,  the  one  at  the  base,  the  other  about  the 
middle;  the  second  do^s  not  reach  the  lateral  margias;  they  are  con- 
nected in  the  middle  by  a  black  line ;  the  third  segment  has  a  narrow 
black  border  anteriorly,  a  small,  black,  diamond-shaped  spot  in  the 
middle,  and  two  black  streaks  on  each  side  between  this  spot  and  the 
lateral  margin ;  the  black  anterior  margin  of  the  fourth  segment  is  en- 
tirely concealed  under  the  preceding  segment,  but  a  diamond-shaped 
black  spot  in  the  middle  and  black  streaks  on  the  sides  are  similar  to 
those  of  the  preceding  segment;  hypopygium  yellow.  Femora  black, 
except  the  tip,  which  is  yellowish ;  the  hind  femora  have  the  latter  half 
brownish  yellow;  tibiae  and  tarsi  brownish  yellow ;  the  last  two  joints 
of  the  tarsi  black;  the  end  of  the  third  joint  brown.  Wings  tinged  with 
brownish,  somewhat  yellowish  at  tho  base  and  along  the  anterior  margin; 
a  brownish  cloud  on  the  cross- veins.    Length,  11  to  12'"""." 

"This  species  is  very  like  the  well-known  Sphecomyia  vittata,  but  is 
smaller,  has  the  first  two  joints  of  the  antennte  much  shorter,  and  a 
somewhat  different  picture  of  the  third  and  fourth  abdominal  segments." 

Sphecomyia  Pattonl.    (Pinto  xii,  fig.  8.) 

Sphecomyia  Pattonii  Willistou,  Proc.  Am.  Phil.  Soc,  xx,  328. 
Calliprohola  calorhina  Bigot,  Annales  Soc.  Ent.  Fr. ,  1884,  353. 

Habitat. — Washington  Territory  I 

S  ,9  .  Length,  13  to  14""".  Front  a  little  longer  and  more  inclined 
than  in  8.  vittata,  black  in  the  female,  with  a  rounded  yellow  spot  each 
side,  narrowly  separated  from  the  yellow  of  the  face ;  frontal  triangle 
in  the  male  black  in  the  middle,  near  the  eyes  yellow.    Eyes  of  male  very 


wmmmmmmm 


SYNOPSIS   OF   NORTH    AMERICAN    SYRPHID^. 


259 


narrowly  separated.  Antenuae  reddish  brown  or  blackish,  about  half 
as  long  as  the  horizontal  diameter  of  the  eye,  first  two  joints  short,  third 
joint  transversely  oval,  reddish  or  yellowish  near  the  base  below.  Face 
considerably  concave  on  the  upper  half  in  the  male,  less  so  in  the  female, 
with  a  not  very  prominent  convexity  below ;  light  yellow,  opaque,  with 
a  broad  shining  black  stripe  reaching  fron»  antenna;  to  the  oral  margin ; 
cheeks  broadly  shining  black.  Pile  of  vertex  black.  Posterior  orbits 
below  yellow,  with  yellow  pile,  above  very  narrowly  whitish.  Thorax 
shining  black,  with  blackish  pile  on  the.  dorsum  and  scutellum  ;  a  spot 
on  the  humeri,  an  oval  one  on  tlu'  mesoi)leurae,and  a  round  one  on  the 
sternopieurse,  yellow  ;  scutellum  black,  yellow  at  the  base  Abdomen 
black,  with  yellow  bands  and  yellow  pile ;  first,  second,  third,  and 
fourth  segments  with  rather  narrow  posterior  margins;  second  segment 
with  an  arcuate  band,  attenuated  towards  the  middle,  broadly  interrupted 
aud  separated  from  or  narrowly  connected  with  the  yellow  posterior 
border  on  the  lateral  margin  :  third  and  fourth  segments  with  a  median 
baud,  less  broadly  interrupted,  expanded  on  the  lateral  ujargins  to  con- 
nect with  the  i)osterior  cross-band  ;  fifth  segment  in  the  female,  with 
three  small  subcontiguous  black  spots  ;  hypopygiuni  black  with  yellow 
pollen.  Front  legs,  except  extreme  tip  of  femora  and  base  of  tibise, 
black,  the  tarsi  somewhat  thickened  ;  middle  and  hind  legs  yellowish 
red,  blackish  toward  the  base  of  femora,  and  the  last  two  joints  of  the 
tarsi  black.  Wings  a  little  brownish,  especially  along  the  veins,  a 
brownish  cloud  at  the  origin  of  the  third  vein  and  the  outer  end  of  the 
second  basal  cell. 
Two  specimens. 

CERIA.* 

Ceria  Fabricius,  Ent.  Sjst.,  277,  1794. 

Sphixitnorjaha Rondani,  Ann.  Soc.  Ent.  do  France,  ii,  8,  213. 

Of  medium  to  large  size  species,  slender,  nearly  bare,  black  or  dark  fer- 
ruginous, with  yellow  bands  and  spots.  Head  somewhat  flattened,  a  little 
broader  than  the  thorax.  Antenufe  usually  inserted  upou  a  long  slen- 
der process,  but  the  process  sometimes  short,  or  even  wholly  wanting. 
Antennas  much  longer  than  the  head,  porrect;  first  joint  long,  slender; 
second  and  third  joints  somewhat  shorter,  of  nearly  equal  length,  to- 
gether forming  an  elongate  oval  mass,  with  a  short  pointed  terminal 
style.  Face  below  the  antennae  not,  or  only  slightly,  excavated  in  pro- 
file, vertical,  much  produced  below  the  eyes,  in  outline  obtuse.  Eyes 
bare,  contiguous  in  the  male ;  vertex  angular,  projecting.  Thorax  rather 
long  quadrangular,  with  yellow  spots;  scutellum  semicircular,  wholly, 
or  in  part,  yellow.  Abdomen  elongated,  cylindrical,  more  or  less  nar- 
rowed at  the  base,  with  yellow  bands.  liegs  moderately  strong,  hind 
femora  somewhat  elongated,  tibise  somewhat  thickened  toward  the  end. 

*  K}/fjta,  a  girth. 


h 


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260  BULLETIN   31,    UNITED    STATES   NATIONAL   MUSEUM. 

Margin;.!  (it'll  ot  flic  \viii<j[s  open,  third  lonji'itiuliual  vein  ansnlated  and 
with  a  stamp  of  a  vein  projcctinji'  into  the  iirst  posterior  cell;  anterior 
croHS-veiu  beyond  tiie  middle  of  the  discal  cell,  oblique.  Tegulaj  large. 
Tyi»e  of  genus,  (7.  cowopsoirfews  Linn6. 

TABLE  OV  SPECIES 

1. — AntoiuiitI  process  of  front  not  more  tliiin  half  as  lony;  as  tlii^  ru>>t  joint  of  antenuio; 
tl'ird  longitnilinal  vein  augnlated,  bnt  ..^eai'ci'ly  hent  into  the  Hrst  postt'i'ior 

coll 2 

Ant(;nual  jn-occss  slcMulcr,  longer   than  iirst  joint  of  antenna!;  third  vein  hoiit 

deeply  into  lirst  posterior  cell     .  3 

2. —  Vntennal  j-iocess  almost  wholly  wanting,  first  joint  of  antennae  vtny  slciickT, 
nearly  as  long  as  the  two  following  together:  laei-  vertical,  not  at  all  ex- 
cttvat(,'d  in  profile;  tecond  segment  of  the  abdomen  nnicli  constricted,  third 

and  fourth  segments  each  with  two  arcuated  si>ors signifera 

Autcnnal  i)ro(ress  about  one-halfas  long  as  lirst  joint  of  antenniB,  the  latter  slender, 

about  three-lburths  as  long  as  last  two  togeth<'r  ;  abdomen  without  the  side 

sjjots  on  third  and  fourth  segments,  the  sceoi.d  segment  less  constricted; 

wings  similar  to  preceding;  the  gisneral  color  more  ferruginous   .     Loewii 

3.— Second,  third,  and  fourth  segments  of  aI)domen  each  with  two  yellow  spots,  in 

addition  to  the  bands  of  the  hind  margins pictula 

Second,  third,  and  fourth  segments  without  such  spo^s 4 

4. — St!coud  segment  of  abdomen  much  shorter  than  the  third      .     .     .     .  abbreviata 
Second  segment  of  abdomen  nearly  as  long  as  the  third tridens 

Ceria  Loewii,  n.  cp. 

Habitat. — Arizona ! 

(?.  Length,  IC""".  Face  sulphur  yellow;  from  the  autennal  pro- 
tuberauce  a  moderately  broad  ferruginous  .stripe,  white  dusted  along 
the  middle,  where  it  is  the  broad*  st,  ruus  to  the  oral  margin.  Cheeks 
broadly  dark  ferruginous.  From  the  base  of  the  autennal  process  a 
small,  indistinct  projection,  on  each  side,  is  directed  outwards  and 
downwards.  Antennal  process  short,  but  little  more  than  one-half  as 
long  as  the  first  joint  of  the  antennsB;  the  latter  slender,  about  three- 
fourths  as  long  as  the  two  following  together ;  second  joint  a  little 
shorter  than  the  third,  style  -blender;  the  color  is  dark  ferruginous. 
Vertex  reddish  yellow.  Dorsum  of  thorax  brownish  black ;  red  on  the 
sides  and  on  the  meso  and  ptero  pleurae ;  humeri  and  scutellum  yellow. 
Abdomen:  first  segment,  reddish  brown;  second  segment,  rather  slender, 
somewhat  longer  than  the  third,  with  a  spot  on  each  side,  nearly  con- 
tiguous, and  narrow  posterior  margin,  yellow,  elsewhere  reddish- brown- 
ish black ;  third  and  fourth  with  broader  yellow  hind  margins.  Legs 
reddish  yellow.  Wings  brown  on  the  anterior  portion ;  third  longitu- 
dinal vein  slightly  augulated  and  with  a  stump  of  a  vein  ;  first  posterior 
cell  closed  in  the  border  of  wing. 

Two  specimens  (H.  K.  Morrison).  This  fine,  large  species  I  dedicate 
to  the  memory  of  Dr.  Loew,  to  whom  the  science  of  American  dipter- 
ology  owes  so  much. 


SYNOPSIS    or    NORTH    AMERICAN    SYRPHID^. 


261 


Ceria  abbreviata. 

Ceria  ahhreviata  Locw,  Centnr.,  v,48;  x,  57,  note. 
Habitat. — Now  Eiiglaiid,  Virginia,  Florida! 

(?,  9.  Lonytli,  10  to  11""".  Black.  Face  light  yellow  with  a  lue- 
ilian  bhuik  stripe,  quite  uarrow  in  the  male,  broader  in  the  female,  nin- 
uing  front  the  antennal  ])rocess  to  the  oral  margin  ;  cheeks  broadly 
shining  bhick.  Frontal  triangle  in  male  yellow,  narrdwly  divide<l  by 
black  in  the  middle,  and  separated  from  the  yellow  of  the  face  by  a 
black  stripe,  running  from  the  base  of  the  antennal  process  to  the  eyes. 
Eyes  in  male  touch  each  other  very  slightly.  Front  in  female  black, 
with  four  small  rounded  si)ots,  two  of  which  are  just  above  the  base  of 
the  frontal  process  (sometimes  obsolete),  and  one  on  each  side  near  the 
orbit.  Antennal  process  slender,  nearly  as  long  as  the  first  two  joints 
of  the  antenme  togeiher,  yellowish  towards  the  base,  more  brownish  on 
the  outer  i)art ;  first  antennal  'oint  but  little  longer  than  the  secoinl, 
reddish  on  basal  half,  blackisu  on  distal  half;  second  joint  black,  yel- 
lowish at  tip ;  third  joint  black,  scarcely  longer  than  the  second  ;  style 
short.  Vertex  light  yellow,  swollen,  occiput  and  orbits  on  the  sides 
black.  Thorax  black ;  humeri,  a  small  spot  on  side  of  dorsum,  some- 
times a  vittula  above  the  root  of  wings,  a  large  vertical  mesoi)leur!d, 
and  a  smaller,  nearly  contiguous  sterno-i)leural  spot,  an<l  narrow  border 
of  scutellum,  yellow.  Abdomen  black;  third  segment  nearly  ecpial  in 
length  to  ihe  lirst  two;  first  segment  on  the  sides  broadly,  second  seg- 
ment with  a  broad  posterior  band;  third  and  fourtii  with  narrow  poste- 
rior bands,  yellow.  Legs  in  male  chiefly  black;  base  and  tip  of  Imnt 
femora;  base  and  apical  third  of  middle  and  hind  l'eiii(»ra,  iniddle  tiliia' 
and  basal  half  of  Iront  and  hind  tibi;e,  and  tarsi  except  th<'  teniiinal 
joints,  yellowish  red;  in  the  female  the  legs  are  chietiy  leddish,  Mie 
base  of  femora,  tip  of  til)ite,  and  tip  of  tarsi,  more  or  less  brownish. 
Wings  brown  ori  anterior  half,  nearly  hyaline  behind,  tiie  costal  cell. 
The  brown  follows  the  spurious  vein  to  the  snuill  ciossvein  and  tiieii 
clouds  the  posterior  border  of  the  third  vein  to  its  tip.  Third  vi  in 
strongly  angulated  and  with  a  stump  of  a  vein. 

Three  specimens,  Xew  Ilaven,  Conn.,  and  one  from  Virginia  (Mr. 
Tb'^o.  Pergande). 

Ceria  pictula. 

Ccn'a  7>(c/i(?fl  Loew,  Ncno  Beitriigc,  etc.,  i,  17. 

Habitat.— S>outhevn  States  (Loew). 

3,9.  Length,  9™'".  Head  as  in  abbreviata;  the  thorax  may  show 
an  additionally  yellow  spot  on  the  suture;  the  abdomen,  in  addition  to 
the  posterior  yellow  margins,  has  on  the  second,  \liird,  and  fourth  seg- 
ments each  two  yellow  spots;  the  second  segment  is  longer  as  in  tridvttn; 
wings  and  legs  similar,  or  somewhat  darker. 

The  present  species  has  not  been  recognized  since  its  deseri|)tion  in 
1853.  The  descrijttion  by  Loew  is  as  follows:  "(Ian/  von  Korperhaue 
der  Ceria  couoimoidcs  und  resj/iforntis,  doch  nocli  kleiner  als  letztere, 


I' J 


m 


mm 


m 


262 


BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 


Ml 


t 


'\     !l 


H 


Auch  in  der  Farbeneinvcrtheilung  ahaelt  sie  diesen  Arten,  namentlich 
der  Ceria  c(mopaoides,  our  dass  sie  auf  dem  Thorax  und  Hinterleibe  gelbe 
Flecken  hat,  welche  jener  fehlen.  Die  Farbung  des  Eopfs  wie  bei  0. 
conopsoidea.  Auf  dem  Thorax  findet  sich  auf  der  Naht  uoch  zwei  gelbf 
riecke,  welche  C.  conopaoides  fehlen ;  die  Spur  von  zwei  andern  gelben 
Flecken  findet  sich  a  j  der  Mitte  de3  Vorderrandes.  Der  Hinterleib  hat 
von)  2ten  Binge  an  Tiiusser  dem  gelben  Hinterrandssaume  je  zwei  gelbe 
Flecken.  Farbung  der  Seine  noch  etwas  dnnkler,  als  sie  sich  gewohnlich 
bei  C.  eonopaoidea  findet.  Fliigelgeader  wie  bei  C.  conopaoidea  und  vea- 
piformia;  die  Farbung  derselben  ttberall  dunkler  als  bei  diesen  Arten." 

Ceria  signifera. 

Ceria  aigni/era  Loew,  Neue  Beitr.,  i,  18. 

Habitat. — Mexico  (Lw.),  Texas,  Florida ! 

3  .  Length,  14™™.  Face  perpendicular,  not  at  all  excavated  in  outline, 
yellow  with  a  large  yellow  sagittate  spot  in  the  middle  extending  nar- 
rowly to  the  oral  margin  and  more  narrowly  above  to  the  black  that 
surrounds  the  antennte,  the  base  of  which  is  yellow,  in  its  middle  with 
a  narrow  yellow  stripe  or  spot ;  on  either  side  of  the  base  of  the  an- 
tennsB  the  black  extends  out  narrowly  to  the  orbit;  frontal  triangle 
yellow  along  the  eyes  and  separated  from  the  yellow  of  the  face  by  the 
lateral  black  projections;  cheeks  broadly  black  with  a  yellow  stripe 
reaching  from  the  orbit.  Frontal  process  almo&^  wholly  obsolete;  the 
immediate  ground  upon  which  the  antennae  are  inserted  is  yellow;  first 
joint  long  and  slender,  a  little  shorter  than  the  following  two  together, 
brownish  yellow,  darker  toward  the  end,  second  joint  shorter  than  th°, 
third,  black,  reddish  at  the  tip,  third  joint  black.  Occiput  black,  the 
orbit  dusted  with  white  on  the  sides,  vertex  wholly  yellow,  extending 
broadly  outwards.  Thorax  black ;  humeri,  a  spot  on  the  sides  at  base 
of  suture,  a  distinct  lateral  supra-alar  vittnla,  an  elongate  mesopleural, 
and  a  sterno-plenral  spot  immediately  below,  and  nearly  all  the  scutellum, 
yellow.  Abdomen  much  contracted  at  base  of  second  segment,  black ; 
second,  third,  and  fourth  segments  with  equal  yellow  fasciie  on  the  pos- 
terior margins;  second  segment  yellow  on  the  sides  at  the  base,  with  an 
oval  reddish  spot  on  the  sides  above,  toward  the  base;  second  segment 
near  the  base  with  an  interrupted  fascia;  third  and  fourth  segmentc  with 
a  U-shaped  spot  on  each  side,  the  convexity  behind.  Legs  wholly 
yellow.  Wings  brown  in  front,  more  yellowish  toward  the  base ;  third 
vein  only  a  little  angulated,  not  bent  into  the  first  posterior  cell. 

9  .  Front  black,  at  the  base  of  the  antennae,  a  spot  on  each  side  of 
the  base  of  the  antennae  near  the  eye,  an  arcuated  transverse,  abbre- 
viated band  above  the  base,  and  the  vertex,  yellow. 

One  male  specimen  from  Professor  Riley's  collection  (Florida),  and 
three  females  in  the  Loew  type  collection  from  Texas  (Boll),  bearing 
the  label  *' signifera?"  in  Lo«w's  writing.  I  find  discrepancies  in  the 
origiaal  description  which  make  me  doubt  that  this  determination  is 
the  correct  one. 


SYNOPSIS   OF   NORTH   AMERICAN   SYBPHIDiB. 


263 


Cerla  trldeni. 

Ceria  tridens  Loew,  Ceutur.,  x,  57. 

Habitat. — Califoruia,  Washington  Territory ! 

^,  $  .  Length,  11  to  12""".  Closely  related  to  aitbreviata;  black,  sub- 
opaque;  face  yellow,  with  a  median  black  stripe,  sometimes  quite  broadly 
oval,  at  other  times  narrow,  extending  froni  the  base  of  the  antenual  pro- 
cess to  the  mouth ;  on  either  side  of  the  base  of  the  antennal  process  and 
connected  with  the  facial  stripe  an  oblique  stripe  runs  outward  towards 
the  orbit,  sometimes  reaching  it  in  an  attenuated  point;  cheeks  broadly 
black,  sometimes  with  a  slender  yellow  line;  frontal  triangle  yellow 
along  the  border  of  the  eyes,  separated  in  the  middle  by  black ;  in  the 
female  the  yellow  may  extend  across  the  front,  just  above  the  antennal 
process,  elsewhere  black,  the  vertex  with  a  yellow  oval  spot  on  each 
side  in  both  sexes,  touching  the  corner  of  the  eye.  Antennie  black, 
joints  of  nearly  equal  length;  process  elongate,  about  as  long  as  last 
two  joints  together;  reddish  tov'ard  the  base.  Thorax  black;  humeri, 
a  spot  near  the  outer  end  of  suture,  usually  a  vittula  above  root  of 
wings,  a  large  oval  spot  on  the  meso-pleurae,  a  smaller  one  on  the 
sterno-pleurae,  and  a  still  smaller  one  on  the  ptero-pleurae,  all  nearly  con- 
tiguous, and  the  scutellum  in  large  part,  yellow.  Abdomen  cylindrical, 
black,  finely  scrobiculate,  the  sides  of  the  first  segment  and  the  pos- 
terior borders  of  the  remainder  yellow,  the  second  and  third  of  nearly 
equal  width,  broader  on  the  sides,  the  fourth  very  broad  in  the  middle, 
attenuate  on  the  sides,  and  sometimes  with  a  conspicuous  lunate  spot 
on  each  side  of  yellowish  pollen,  hypopygium  wholly  black.  Legs, 
male:  Front  and  middle  ^emora  black,  except  the  base  and  tip;  hind 
femora  black  on  outer  half;  all  the  tibiae  with  a  brownish  ring  before 
tip ;  intermediate  joints  of  all  the  tarsi  brown,  last  two  of  hind  tarsi 
black;  legs  elsewhere  yellow.  Female:  Yellow,  the  front  femora  with 
a  ilorsal  black  streak,  tlie  tarsi  more  ochraceous.  Wings  brown  in  front, 
hyaline  behind. 

Four  specimens.    The  third  abdominal  segment  in  this  species  is 
scarcely  longer  than  the  second. 

Ceria  nigripennis,  ii.  sp. 
Habitat. — Mexico ! 

9  .  Length,  15  to  10""".  Deep  black.  Face  with  two  large  elongate 
triangula'  yellow  spots  with  the  apex  below ;  on  either  side  of  the  base 
of  the  antennal  process  near  the  eye  a  small  yellowish  spot.  Antennal 
process  a  little  longer  than  the  first  joint  of  the  antenna?,  llumeri,  the 
scutellum  wholly,  a  large  spot  on  the  meso-plenriv,  a  smaller  on«'!  behind 
it  and  nearly  contiguous,  and  a  spot  on  each  side  of  the  metanotum, 
light  yellow.  Abdomen  only  lightly  constricted  at  base  of  secon<l  seg- 
ment ;  a  spot  on  each  side  of  the  base  of  second  segment,  the  posterior 
nargin  o*"  the  same  segment  narrowly,  and  of  the  third  segment  still 
more  narrowly  yellow.     Legs    wholly  black.     Wings  deep  blackish 


M 


I      :   } 


'        l| 


!   » 


T 


264 


IJULLETIN    31,    UNITED    STATES    NATIONAL    MUSEIM. 


brown,  a  largo  triangular  space  on  tlio  outer   posterior  piirt,  nearly 
hyaline. 
One  specimen,  in  the  Osten  Sacken  collection  at  Cambridge. 

Cerla  superba,  n.  sp. 

Habitat Mexico  I 

S  .  Length,  19'""'.  Ked,  Face  red,  with  four  rather  narrow,  not  con- 
spicuous yellow  stripes  running  to  the  oral  margin  ;  on  the  lower  part 
sub-tuberculate  ;  on  each  side  of  the  base  of  the  antennal  process  with 
a  small  black  spot.  Antennal  process  slender,  as  long  as  the  two  outer 
joints  of  the  antenna)  together.  Vertex  only  moderately  swollen.  Dor- 
sum of  thorax  deep  red;  in  front  near  the  middle  with  the  beginning 
of  two  yeUowish  dusted  stripes ;  the  humeri,  a  sjtot  at  outer  end  of 
the  suture,  two  sunt  11  spots  in  front  of  the  scutellum,  and  a  slender 
supra-alar  vittula,  yellow ;  contiguous  with  each  supraalar  vittula  on 
the  inner  side  there  is  a  black  abbreviated  stripe ;  scutellum  yellow, 
across  the  disk  slenderly  black ;  an  elongated  yellow  meso  pleural  spot 
bordered  with  blackish,  a  spot  above  the  middle  coxae,  and  a  large  one 
on  each  side  of  the  mesonotum  likewise  yellow.  Abdomen  red,  brown- 
ish toward  the  end,  much  constricted  at  base  of  second  segment;  base 
of  second  segment  and  its  posterior  margin  yellow.  Legs  red ;  the  hind 
femora  blackish  above  at  base.  Wings  hyaline,  reddish  along  the  front 
margin. 

One  specimen  in  the  Osten  Sacken  collection  at  Cambridge. 

Ceria  pedicellata,  n.  sp. 

Habitat. — Mexico! 

(?.  Length,  12""".  Antennal  peduncle  short,  not  a  third  the  length 
of  the  first  joint.  Black ;  antenna)  reddish-black,  the  liirger  part  of  the 
first  joint  red;  tirst  Joint  very  slender,  a  little  lon^icr  tiian  the  follow- 
ing joint,  the  third  joint  about  half  the  letigth  of  the  second.  Face 
lightly  pollinose  in  the  middle  and  on  the  sides ;  vertex,  frontiil  orbits, 
n  small  orbital  spot  on  the  upper  part  of  the  face,  and  a  pair  of  i'jiciul 
stripes,  convergent  and  narrower  below,  yellow.  Dorsum  of  thorax 
scrobiculate ;  humeri,  a  small  spot  on  outer  end  of  suture  and  narrow 
base  and  margin  of  scutellum,  yellow  ;  pleura)  wholly  black  Abdomen 
black;  base  of  second  segment  on  the  sides,  and  posterior  margin,  and 
the  posterior  margins  of  the  two  following  segments  more  narrowly, 
yellow;  fourth  segment  with  a  pair  of  pollinose  arcuate  lines;  second 
segment  slender,  cylindrical,  and  elongate.  Legs  reddish-brown,  the 
hind  femora,  except  the  base,  black,  and  the  front  legs  more  blackish ; 
base  of  all  the  tibia)  yellow ;  hind  and  middle  tarsi  brownish-red. 
Wings  brown  in  front,  subhyaline  behind. 

One  specimen  (Niitional  Museum,  I'rofessor  Kileys'  collection).  Isthmus 
of  Tehuante]»ec  (Sumiciirast ).  Is  closed  allied,  apparently,  to  C.  arietis, 
but  differs  in  the  face  and  pleuric. 


SYNOPSIS   OF   NORTH   AMERICAN  SYRPHID^. 


266 


Cezia  Boutellata,  II.  H]>. 

Habitat. — Mexico! 

9  .  LiMifjth,  9  to  10™'".  Dark  reddish  black.  Peduucle  of  antenues 
Bbort,  scarcely  a  third  the  length  of  the  first  joint;  second  joint  not 
much  longer  than  the  third.  Antennae  and  peduncle  brownish  red. 
Vertex,  small  orbital  spots  nearly  opposite  base  of  antennae,  and  on  the 
sides  of  the  face,  a  ^)air  of  stripes  beginning  a  little  below  the  base 
of  the  antennae  and  somewhat  converging  to  the  oral  margin,  and  two 
on  the  cheeks,  yellow.  Dorsum  of  thorax  black;  a  small  spot  on  the 
humeri,  a  smaller  one  on  the  outer  end  of  suture,  a  slender  intra-alar 
vittula,  reaching  nearly  to  the  suture,  a  large  trapeaoidal  spot  in  front 
of  the  scutellum,  and  the  scutellum  wholly,  yellow.  Pleurae  dark  red,  a 
median  vertical  vittula,  and  a  spot  on  sides  of  metanotum,  yellow. 
Base  of  second  segment  of  the  abdomen,  and  its  posterior  margin,  and 
that  of  the  next  segment,  yellow;  second  segment  very  narrow  near 
the  base,  but  broad  behind.  Legs  dark  brownish  red.  Wings  brown 
in  front,  nearly  hyaline  behind. 

One  specimen,  Isthmus  of  Tehuantepec  (National  Museum,  Professor 
Riley's  collection). 

ADDITIONAL  NORTH  AMERICAN  SPECIES. 

Ceria  nigra. — Mexico. 

Sphyximorpha  nigra  Bigot,  Annales  Soc.  Ent.  «lc  Fr.,  1883,  317. 

Ceria  rufibasis.— Mexico. 

Sphyximorpha  riifibasis  Bigot,  ibid.,  318. 

Ceria  arietis  Locw,  Neue  Beitr.,  i,  17. — Mexico. 

Ceria  Daphnseus  Wallicr,  List,  etc.,  iii,  637 ;  Westwood,  Trans.  Ent.  Soo.,y,231,  pL 
xxxiii,  fig.  7;  Loew,  Neuo  Beitr.,  i,  18. — Jamaica. 

Ceria  cacica  Walker,  Trans.  Ent.  Soc.  N.  S.,  v,  287.— Mexico. 
Ceria  tricolor  Loew,  Wien.  Ent.  Monatschr.,  v,  37. — Cuba. 


i  ' 


i 


I" 


I.* 


f'l-- 


I>ART  III. 


CONCLUSION 


867 


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Wm 

■■ 

! 

vSm 

"ii 

;! 

jH  ' 

Hf 

.' 

i 


^\ 


Partiil-conclusion. 


TTAHITS    or    TUi;    SYIJI'IIID^K. 

In  their  adult  habits  the  SyrpliiilwuW  show  a  jiiviit  uniformity.  They 
are  Uowcr  llit's,  and  feed  upon  lioni'.v  and  poHcn.  They  aw  ohscrved 
on  blossoms  of  sweet-smelling,  melliferous  phi nts,  sucli  as  the  iiymenop- 
terajjrefer;  and  patches  in  bloom  of  blackberry  (/»!»//>;/«),  wild  yherry 
{PrunKs),  dogwood  (Cornus),  Canada  thistle  (CirHum),  and  elderberry 
will  always  be  sure  to  reward  the  patience  of  the  collector.  Some  spe- 
cies, as  those  of  ISyritta,  Sphcvrophoria,  Memnrapta,  etc.,  will  be  seen 
wherever  there  are  blossoms.  Species  of  the  last,  especially,  are  very 
abundant  about  corn-lields  when  the  jdants  are  in  blossom,  and  will 
frecpiently  alight  upon  one's  hands;  these  "sweat  Hies"  are  feared  by 
not  a  few  persons,  under  the  belief  that  they  will  "sting."  All  are  sun- 
shine-loving, and  will  rarely  be  found  except  in  the  middle  of  bright 
unclouded  days.  To  collect  most  of  the  tiijrphini,  Etistalini,  and  fol- 
lowing species,  one  should  seek  some  i)atch  of  honey-bearing  flowers, 
such  as  1  have  indicated,  and  patiently  stand  and  watch  for  their  ap- 
pearance, moving  only  slowly  about.  The  ChiUmm  will  mostly  be 
caught  in  beating,  or  in  sunshiny,  meadowy  spots  in  the  woods.  Some 
species,  as  those  of  Xylota,  are  found  among  the  foliage  of  bushes  in 
blossom,  and  here  and  there  appearing  in  sight,  resting  upon  some  leaf. 
Species  of  Chrysogaster  will  be  found  on  flowers  in  dam^)  places,  and  are 
easily  captured,  their  flight  being  slow.  Species  of  Neoascia  will  be 
readily  overlooked  unless  especial  attention  is  devoted  to  them.  They 
live  among  low  bushes  and  are  not  usually  taken  from  flowers.  Species 
of  Sphegina,  on  the  other  hand,  are  found  about  flowers,  especially  in 
elevated  regions.  Si)ecimens  of  Baccha  will  rarely  be  taken-when  at 
rest ;  like  most  of  the  slender  species  they  are  constantly  on  the  wing, 
and  only  now  and  then  rest  very  lightly  upon  some  sunny  leaf  or  blos- 
som. Owing  to  their  wide  distribution  a  considerable  number  of  species 
in  any  one  locality  will  reward  long-continued  collecting.  In  a  few  days, 
in  the  first  week  in  August,  I  obtained  forty-seven  near  the  base  of 
Mount  Washington,  the  majority  of  them  from  a  single  patch  of  elder- 
berry blossoms  not  a  rod  in  diameter,  near  the  edge  of  the  forest.  The 
bright  yellow  markings  if  many  lose  their  freshness  after  death,  and 
the  specimens  should  never  be  allowed  to  be  moistened  or  wetted.    The 

26!) 


I.  ;  i 


i; 


270 


BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 


I''     2     I 


most  convenient  uoUcctin^bottle  that  I  have  iiHed,  conHiHts  of  a  plain, 
widemoutlied,  Htnail  l)ottle,  lined  throu(;liout  witli  blotting-paper,  in 
the  firm  cork  of  wlii(^li  a  small  cavity  is  lllled  with  blotting-paper  wet* 
ted  with  a  Noiution  of  cyanide  of  ])otaMh.  For  a  (;ollc(!tiiig-net  I  would 
reconunond  coar.se  bobbinet  lace,  attached  to  a  light  wire  ring  eleven 
inchcH  in  diaiiicter,  with  a  light,  rather  short  handle. 

LARV^. 

The  earlier  stages  and  metamorphoses  of  many  of  the  European  species 
of  SyrphidoB  are  known,  and  very  similar  habits  and  structural  peculi- 
arities may  be  expected  from  the  American  species  when  they  shall 
have  been  more  studied  in  the  larval  and  pupal  conditions.  Very  few 
species  hitherto  have  been  observed  in  the  United  States,  and  they  oflFer 
no  novelties  in  the  general  known  habits  of  the  family.  The  larvoo  live 
usually  upon  vegetable  substances,  though  some  are  partly  or  wholly 
parasitic  upon  other  insects,  especially  the  Aphido),  which  they  serve 
largely  to  keej)  in  check.  Uorae  are  aquatic,  living  in  mud,  outhouHCH, 
vegetable  mold,  breathing  through  the  elongate  stigmatic  tube  at  the 
hind  end  of  the  body,  which  they  protrude  from  the  substances,  when 
very  moist,  in  which  they  live.  Other  species  live  under  bark,  on  leaves, 
in  the  nests  of  bees,  ants,  etc. 

The  larvee  are  usually  not  very  elongate,  with  firm,  sometimes  tough 
skin,  the  head  segments  small  and  extensile.  Like  the  other  families 
of  the  Oyclorrhapha,  the  larvte  of  Syrphidae  do  not  have  a  distinctly 
dififerentiated  head.  The  external  mouth-parts  are  either  wholly  want- 
ing, with  only  a  soft  fleshy  opening,  or  there  are  two  or  four  outwardly 
directed  hooklets.  There  are  also  short,  small,  one  or  two  jointed  fleshy 
antennae.  The  body  is  smooth,  or  provided  with  soft,  conical  projections 
and  bristles :  below  usually  with  seven  pairs  of  abdominal  feet.  At 
the  posterior  end,  the  body  terminates  in  a  more  or  less  elongate  tube, 
single  or  double — the  stigmata.  This  sometimes  forms  a  short,  almost 
chitinized,  tubercular  projection  on  the  dorsal  part  of  the  last  segment ; 
at  other  times  it  is  very  long,  longer  than  the  body,  slender,  composed 
of  two  joints,  the  one  sliding  within  the  other,  like  the  joints  of  a  tele- 
scope. It  is  never  divaricate,  or  forked  at  the  tip,  as  in  many  of  the 
other  tailed  larvae  in  the  allied  families.  In  changing  to  the  pupal  con- 
dition the  larval  skin  contracts,  as  in  all  of  the  Oyclorrhapha,  to  form 
the  pupal  envelope,  and  the  body  becomes  shorter,  more  oval,  and  of  a 
darker  color,  the  elongated  respiratory  type,  in  the  "  rat-tailed  "  species, 
being  curved  over  the  back.  At  the  expiration  of  the  pupal  period  the 
anterior  end  of  this  envelope  is  pushed  oflF  by  the  inclosed  insect  and 
the  perfect  fly  escapes,  soft  and  moist,  but  in  a  very  short  time  in  the 
sunlight  to  acqiiire  strength  and  firmness.  Unlike  all  the  other  Cy- 
clorrhapha,  except  the  Pipunculidre,  however,  the  frontal  lunule  in  this 
family  does  not  subserve  the  usual  purpose  of  springing  off  this  trap  or 
lid  to  the  larva's  prison,  for  it  is  fused  with  the  front  and  not  inflatable. 


Al      'I' 


SYNOPSIS   OF    NORTH    AMERICAN   SYRPUIDJE. 


271 


f  tt  plain, 
paper,  in 
aper  wet- 
t  I  would 
II  g  eleven 


lu  species 
nl  peculi- 
hey  shall 
Very  few 
they  offer 
arvoD  live 
or  wholly 
hey  serve 

UthOUNOH, 

be  at  the 
jes,  when 
)n  leaves, 

les  toiij^h 
r  families 
distinctly 
>lly  want- 
utwardly 
;ed  fleshy 
ojectious 
feet.  At 
ate  tube, 
t,  almost 
segment ; 
!omposed 
of  a  tele- 
ly  of  the 
upal  con- 
,  to  form 
and  of  a 
'  species, 
eriod  the 
I  sect  and 
le  in  the 
ther  Cy- 
le  in  this 
is  trap  or 
1  datable. 


This  function  is  that  of  the  inflatable  face,  and  hence  it  is,  this  part  of 
the  Syrphid  anatomy  is  one  of  the  very  best  for  the  furnishing  of  struct- 
ural characters  in  the  a<lult  fly. 

So  iar,  the  larvie  have  furnisheil  evidence  of  only  two  principal  groups 
in  the  family.  In  the  one  (Kriatalinw)  the  larvo)  have  no  mouth  hook< 
lets,  and  in  general  only  rudimentary  mouth-i>artH  (£'r»«<a/i«,  Mallotay 
Volucella,  Uelophilvs,  Pocota,  Xylota^  Orthoneura);  in  the  other  the 
larvee  are  provided  with  well  developed  mouth-hooklets  (Syrphus,  Chi- 
losia,  Doro»,  liaccha,  Memdon,  antl  others).  This  division  coincides 
fairly  well  with  that  based  upon  adult  characters,  but  a  classification 
drawn  from  the  earlier  chara(!terH  can  rarely  supersede  tluit  founded 
upon  the  mature  ones,  though  it  may  materially  modify  it.  Certainly 
Orthoneura  cannot  be  placed  among  the  Eristalina,  or  Mcrodon  among 
tlie  Syrphimt  without  doing  violence  to  most  important  and  real  relation- 
ships. Uraiier  thinks  that  the  larva;,  when  they  are  more  studied,  will 
furnish  more  natural  groups  in  the  .Syrphidte,  but  I  do  not  agree  with 
him,  at  least  to  any  more  than  a  limited  extent.  The  perfect  insect  is 
the  most  complex,  and  must  otter  a  greater  number  and  more  diverse 
characters  than  the  simpler  stages  can  present.  The  use  which  larval 
characters  subserve  the  individual  or  species  must  first  be  ascertained 
before  we  can  learn  their  true  value.  It  is  not  at  all  probable  that  the 
possession  of  mouth  booklets  can  materially  modify  the  life-habits  of 
a  species  when  they  are  present  or  absent  in  such  related  forms  as 
Chilosia  and  Orthoneura.  To  insist  upon  a  classification  based  upon 
such  characters,  would  be  like  insisting  upon  an  equal  valuation  for 
the  presence  or  absence  of  palpi,  ocelli,  etc.  The  presence  or  absence 
of  mouth-hooklets  cannot  be  used  to  divide  the  family  into  principal 
groups. 

The  principal  genera  in  which  the  larval  habits  are  known  are  the  fol- 
lowing : 

Baecha,  Syrphus,  Sphcerophoria,  Fipiza,  Paragus.  Larvse  aphidopha- 
gous. 

Mallota,  Spilomyia,  Xylota,  Brachypalpufi,  Pocota,  ^fyiolepta^  Chryso- 
toxum,  etc.  Larvae  in  decaying  wood  or  trees;  some  of  them  (Mallota) 
long,  "rat- tailed." 

Chilosia.  Larvee  living  in  the  stems  of  Cardium,  SonchuSy  8chrophu- 
laria,  Matricaria,  and  in  fungi  (Boletus  edulin,  etc.). 

Ptatychirua,  Bhingia,  Eristalis,  Syritta,  Orthoneura.  Larvae  in  decay- 
ing vegetable  matter,  manure,  or  in  soft  mud  impregnated  with  decaying 
vegetable  matter. 

Brachyopa,  Xylota,  Chrysochlamys,  Ceria.  Larvae  found  living  in  flow- 
ing sap  of  trees. 

Crioprora.    Bred  by  Osten  Sacken,  from  larvae  found  under  oak  bark. 

Microdon.  Larvae  common  in  ants'  nests.  The  larvee  and  pui)aB  of 
this  genus  are  very  curious  creatures,  resembling  some  land-shells  so 
much  that  twice  they  have  been  described  and  named  as  species  of 
moUusks. 


I 


I 


I 


I  t:i| 


272 


BULLETIN    31,    UNITED    STATES   NATIONAL    MUSEUM. 


! 


fj ' 


'■!' 


I  I 

.    1 


r' 


U' 


r- 


Volucello.    The  liuvfc  arc  parasitic  upon  humblebees,  living  in  tlicir 
nests.    The  very  {jreat  reseiublanco  of  the  adult  of  some  species  to  the 


bees  makes  this  fact  the  more  interesting. 


STRUCTUKAL   CHARACTERS. 


Structural  characters  in  the  Syrphidie  arc  derived  from  all  parts  of 
the  body,  thon{>'h  those  from  the  thorax  arc  unin)i)ortant.  The  ino.st 
useful  are  found  in  the  wing,  but  a  much  larger  number  exist  in  the  head, 
and  arc,  intrinsically,  scarcely  less  valuable.  Next  in  importance  coino 
the  various  ornamental  and  functional  characters  of  the  legs;  while  the 
abdominal  ones  are  superior  only  to  those  of  tiic  thorax.  The  Ibllow- 
ing  remarks,  it  will  be  understood,  are  based  chiefly  upon  my  autoptic 
knowledge,  and  such  reliable  observations  and  descriptions  by  other 
authors  as  have  been  accessil)le  to  nu*;  they  may,  in  some  cases,  require 
modification  to  express  tiie  requirements  of  exotic  genera. 

Most  excellent  struct aral  characters  are  presented  by  the  antennas. 
With  projjcr  caution,  they  are  often  serviceable  in  generic  distribution, 
though  by  far  the  greater  number  will  only  permit  of  spcciiic  employ- 
ment; some  minor  variations  are  sexual,  or  even  individual.  Formerly 
ntuch  greater  reliance  was  placed  ui)on  the  structure  of  these  organs,  for 
generic  distinguishment,  than  our  present  knowledge  will  conlirm.  The 
basal  joint  is  seldom  elongate,  ami  when  so,  the  elongation  is  raiely 
pronounced.  It  may  be  seen  in  Jlicrodoa,  Ckrynogaster,  Criorhina,  Mera- 
pioidus;  Spilomiiia,  Ceria,  etc.,  and  has  only  subordinate  v<alue,  other- 
wise related  species  differing  materially  in  this  respect.  The  second  joint 
is  more  rarely  lengthened,  extraordinarily  in  Sphecomyia,  moderately  in 
species  of  Chryso(jaster,Pipizella,Lepromyia,  Chrysotoxum,Microdon,SLnd 
Cerid.  The  third  joint  offers  the  greatest  diversity  in  form,  and  the  most 
useful  differential  autennal  characters.  In  the  Melanoslomini,  SyrpMni, 
Spheginini,  and  Brachyopini  it  may  be  oval,  but  in  none  of  our  genera  is 
it  distinctly  elongate  or  noticeably  widened.  In  the  Enstalini,  Serico- 
myini,  and  Xylotini  it  is  predominantly  dilated,  rarely  longitudinally 
oval,  never  at  all  elongate.  In  the  Microdonini  and  VolucelUni  it  is 
lengthened  •  I  know  of  no  exception,  though  in  some  species  of  the  lat- 
ter, as  V.  obesa,  the  elongation  is  only  slight;  yet  even  here  the  joint 
is  not  oval,  but  pointed.  Among  the  Chilosini  we  find  the  greatest 
variableness;  in  Pipiza^  Paragiis,  and  Lcpromyia,  more  or  less  slender; 
in  C/jr»/«o^asfer,  with  intermediate  forms  between  marked  elongation  and 
orbicular;  in  the  other  genera,  oval,  orbicular,  or  subquadrate.  In  the 
Milesini  it  is  always  short;  in  Sphecomyia,  s]).,  pointed ;  in  the  other  gen- 
era, transverse.  So  far  as  my  knowledge  reaches,  species  with  elongated 
antenupe  are  not  very  active  in  tueir  habits,  and  frequently  have  pilose 
eyes. 

There  seems  to  be  a  definite  relation  existing  between  the  neuratiou 
and  elongation  of  the  antennoe.  Wherever  the  last  sectiou  of  the  fourth 
vein  and  the  posterior  cross- vein  show  a  tendency  to  a  rectangular  po- 


SYNOPSIS    OK    NORTH    AMKRICAN    SYHIMIIIM:. 


27.5 


11  parts  of 
Tlio  most 
1  tlic  head, 
aiice  conic 
while  the 
'he  follow- 
y  an  top  tic 
s  by  other 
es,  require 

antennas, 
stributioii, 
i(!  I'm  ploy- 
Formerly 
or^iius,  for 
lirm.  The 
1  is  rarely 
Una,  Mera- 
lue,  other- 
Bcond  joint 
derately  in 
jrodon,  and 
id  the  most 
i,  Syrphini, 
r  genera  is 
ini,  Serico- 
?itudinally 
xllini  it  is 
of  the  lat- 
s  the  joint 
e  greatest 
5S  slender; 
gatiouand 
te.  In  the 
other  gen- 
elongated 
ave  pilose 

!  ueu  ration 
the  fourth 
iigular  po- 


sit ion,  or  the  inlk'ction  of  the  anterior  end,  a  like  teiKleiicv  toward  an- 
.eniial  elongation  is  usually  apparent.  Examples  of  this  will  be  seen 
in  Miorodon,  Pnaniy  I'arayns,  Pipizft,  Lcprodnunjia,  Cliri/sofin.sttr,  Voln- 
(flla,  etc.     The  isonverse.  bowevei",  is  not  true. 

Moderate  or  slight  i)luuiosity  of  the  luista  is  of  little  value  in  generic 
(iisti'ibntion.  It  is  disregarded  in  CliilDxid,  the  Urdchijopini^  and  Eris- 
tali:u  Abundant  i»lumosity,  on  the  other  hand,  is  of  excellent  value  in 
the  Volnnllini  and  SfrinHtiifini.  In  all  the  other  American  genera  the 
arista  is  bare,  but  among  the  l-'wropean  genera  i)lumosity  also  occurs  in 
/^'«n^s',  />f»"o.s',and  N/Kf/;V/ff,s7rr.  In  sit  nation,  the  aristadeparts  mark<'dly 
from  its  usiud  basal  ])osition  onl\  ii>  PclcriK-cni,  X((u>ii;iaNtcr,  an<l  Mera- 
pioidiis.  In  some  of  the  long-antenna'd  (Jliilosini  it  is  more  median  than 
basal. 

The  IVont  freciuently  alfords  excellent  chai'a<'ters,  both  genetic  and 
si)ecitic,  in  its  length,  breadth,  lonvexity,  wrinkles,  grooves,  «'tc.  The 
]»()siti(Ui  and  size  of  the  ocelli,  in  species  of  I'l/roplifcna,  Splurropliorin, 
and  Mcsofiraptd,  are  of  specitic  value;  otherwise  theii'  structure  and 
hieation  are  nearly  uniform.  The  projection  of  the  frontal  |)roeess  is 
extremely  great  in  s])ecies  of  Vvria.  In  the  Xi/lotini  and  Milr,siiii  i*s 
size  is  usually  more  noticeable  than  in  the  remaining  groups,  and  is 
;4:reater  in  the  nnile  than  in  the  female;  its  value  is  oidy  eomj>arative. 

Unlike  all  the  other  Diptera  (\veloiriiapha  (exeej)t  the  IMpnuculidie), 
the  supra-antennal  luinila  is  fused  with  the  i'ront,  and  is  not  inflatable 
in  the  process  of  extrication  fnun  the  larval  envelojte.  The  face  sub- 
serves this  purpose,  and  it  is  here  that  we  lind  the  greatest  diversi  y  of 
structure.  With  the  exception  of  Si/rphus,  IJristalis,  and  some  others, 
die  species  in  most  cases  can  be  distinguished  with  more  or  less  cer- 
tainty by  the  I'acial  ])rotile.  The  pr()jection  of  the  epistoma  finds  its 
greatest  develoi)nient  in  li'liinyia,  and  only  a  little  less  in  Ctioprom, 
Criorhinn,  species  of  VoluccUa,  etc.  In  most  genera  there  is  a  more  or 
less  i)ronoun(!ed  convexity  near  the  middle,  or  a  little  below,  but  is 
sometimes  obsolete  or  wanting  where  the  epistoma  strongly  projects  or 
is  receding.  The  face  is  ai)t  to  dilfer  in  sliajje  in  the  two  sexes;  usually 
the  less  convexity  or  tubercularity  is  in  the  female.  This  will  be  moro 
especially  observed  in  species  of  Cltri/xofiastrr  antl  Ckiloniti,  MyiolipUi, 
Ptcrallastcs,  and  the  more  MilcKinAikv  forms. 

The  eyes  dilfer  in  size  and  shaiic  very  api)re(!iabl>  in  ditt'erent  genera, 
l)Ut  characters  tlrawu  from  tiu'in  aie  e\i>ressed  with  dilliculty,  exce)»t 
by  the  aid  of  iigures.  Their  hairiness  or  |)ilosity  is  of  greater,  though 
always  <h)ubtl"ully  generic,  value;  it  may  sejiarate  sjiecies  closely  allied, 
as  Si/rpliKs  rihcsii  and  S.  torrits,  and  species  of  Didttt.  The  following 
have  more  or  less  occular  i»ilosity:  Microdon  spp.,  (,'lirij.sotoxum,  Puilota, 
Pipiza,  Paraf/Hs,  ChiUma  spp.,  Lriuozona,  ('af(il)i»iilia,  Pri,st<ili.s  usually, 
Volnalla  usually,  Copesti/Iton,  M<illot((,  sji.  JhdiosyrpliKs,  and  ('hri/soclilti- 
mys.  It  will  be  noticed  that  most  of  the  species  with  an  exterior  obli(iue 
cross-vein  have  bare  eyes.     Does  their  pilosity  bear  any  relation  to  the 


'li' 


I 


274 


BULLETIN    31,    UNITED    STATES    NATIONAL   MUSEUM. 


K^ 


i 


i 


I : 


IV 


Jl 


M* 


m  ■'  ti 


habits?  Certainly  some  of  the  pilose-eyed  forms  are  the  less  active  of 
the  family. 

The  seutellum  presents  few  structural  characters.  In  ChriffiOf/astcr, 
ripiza,  and  VhlUma  its  thinness  may  be  of  generic  value.  In  Chalcomyiu 
and  Solenaspis  O.  S.,  its  size  and  width  are  peculiar.  Strangely,  both 
ihese  f>enera,  though  widely  separated,  must  present  a  singular  re- 
semblance. In  Microdon  the  shape  and  spines  are  characteristic.  In 
all  the  other  genera  the  seutellum  is  usually  hemispherically  convex, 
and  but  little  variable. 

In  the  wing  numei'ous  characters  appt'ar,  in  nearly  all  i)arts.  The 
!shaj)e  anu  termination  of  the  second  longitudinal  vein,  the  curvature  of 
the  third,  the  position  and  shape  of  the  cross- veins,  the  shape  of  the 
sixth  longitudinal  vein  in  the  Eristaloid  genera,  and  the  termination  in 
the  Milesoid  forms,  all  form  the  basis  of  our  e"  issifieation.  In  the  Syr- 
phoid  neuration  the  veins  r.re  usually  weak,  the  wings  light  and  thin; 
such  are  mostly  adapted  to  a'rial  flight  and  soaring.  In  the  speiiies 
with  inflected  veins  and  more  or  less  elongated  anteunie  Wv^  find  the 
venation  usually  stouter  and  the  wing  heavier,  the  posterior  part  un- 
supi)orted;  such  species  are  more  sluggish  and  less  active  in  flight. 
Finally,  speed  and  strength  are  united  in  the  ErintaUni,  Xylotini,  and 
Milesini.  The  wings  here  have  moderately  strong  veins,  with  the  outer 
and  i)osterior  portions  stronger.  Syritta  differs  most  in  the  position  of 
the  cross- vein,  and  its  habits  are  more  nearly  like  the  Syrphoid  species. 

In  the  abdomen  the  shape,  flattening  and  elongation  offer  the  greatest 
<liversity,  and  aftbrd  both  generic  and  specific  characters,  but  the  fonner 
are  not  easily  limited.  Some  of  the  smaller,  more  slender,  species  an- 
noted  for  their  quick  flight,  as  Alloffrapta,  Sphwrophoria,  Mcsofjrapta, 
iSyritta,  ate.  Those  with  a  short,  thick-set  abdomen  will  usually  be 
found  resting  upon  flowers,  and  never  soaring;  those  with  an  oval  de- 
pressed abdomen,  as  in  Syrphus,  are  the  most  delicate  in  their  structure, 
and  at  the  same  time  very  quick  and  active  in  flight.  The  extremes  of 
shape  are  found  in  Baccha,  where  it  is  sometimes  extremely  slender,  or 
clavate ;  in  Syrphus,  where  it  is  most  dej)ressed  ;  in  the  Mallota  group, 
and  Volncellini,  with  the  gi  safest  convexity  and  shortness,  and  in  Sow- 
gatiter,  with  the  remarkable  contraction  of  the  median  segments.  Tbt^ 
liypopygium  is  usiuilly  inconspicuous,  especially  in  the  Syrphhii,  but  in 
species  of  Spharophoria^  and  many  of  the  XyJotlnl  and  Eristaluii,  it  is 
enlarged  and  conspicuous.  In  IJupcode.s  the  peculiai-  development  of 
the  two  slender  processes  is  remarkable.  The  structure  oC  XaKsigafiter 
ab<h>men  is  the  most  peculiar;  here  the  fourth  segment  is  extraordinarily 
developed  and  arched,  wliolly  excluding  from  sight  the  following  seji- 
ments  and  inclosing  the  terminal  oigans  in  a  deep  ventral  cavity. 

The  legs,  outside  of  secondary  sexual  characters,  which  will  be  spoken 
of  further  on,  do  not  ott'er  a  very  great  deal  of  structural  differences, 
They  find  their  greatest  slenderness  in  the  Syrphim,  MeJanostotnim. 
and  here  rarely  have  any  thickened  parts,  and  then  usually  in  the  feet. 
In  the  Kristulini  and  Xylotlni  they  are  usually  stouter,  and  very  often 


II     ! 


SYNOPSIS    OF   NORTH    AMERICAN    SYRPHID^. 


275 


aJcotinjiu 
?ly,  both 
>'ular  re- 
stic.  In 
'  convex, 

■ts.  The 
vat  lire  of 
[le  of  the 
nation  in 

the  Syr- 
lud  thin; 
e  s|>e(!ies 
I  tind  the 

part  un- 
in  fliftht. 
otini,  and 
the  outer 
losition  of 
d  species, 
e  greatest 
he  former 
pecies  are 
csograpta, 
sually  be 
ti  oval  de- 
structure, 
itremes  of 
slender,  or 
Ota  group, 
id  in  Seno- 
.Mits.    The 
/hi,  but  in 
falini,  it  is 
loi)nuMit  of 
\'a)tiiig((.sti'r 
lordiuarily 
owing  sej;- 
ivity. 
1  be  spoken 
Lliliereiiees. 
anostomini. 
in  tbe  feet. 

very  often 


with  the  iiiud  femora  elongated  and  thickened.    In  tlie  Milrsini  the  great- 
est elongation  of  the  legs  occurs,  in  the  ClinjHO(jn,ster-\[ke  forms  the  most 


shortening. 


SECONDARY    SEXUAI.   CnARACTEKS. 


Secondary  sexual  characters  occur  witli  gre;it  frequency  in  this  fam- 
f  y,  and  will  offer  many  interesting  subjects  for  future  study.  They  are 
l-^und  in  most  parts  of  the  body,  but,  as  one  would  exj)ect,  are  met  with 
in  the  greatest  diversity  and  number  in  the  legs 

In  the  head  a  ditierence,  constant  througliout  tlie  family,  is  found  in 
the  eyes.  In  nearly  all  the  males  they  are  contiguous  for  a  longer  or 
shorter  distance  between  the  ocelli  and  antennie  (holoptic) ;  in  a  few 
genera  (as  Microdon,  Chalcotnijia,  Crioprora,  Triodonta,  MaUota^  Ilelo- 
pliUus,  etc.)  they  are  more  or  less  widely  separated  by  the  front  (di- 
choptic);  yet  in  every  case,  to  the  practiced  eye,  the  male  can  be  dis- 
tinguished with  tolerable  certainty  by  the  front  alone;  even  when  the 
female  is  unknown  there  is  never  any  excuse  for  confounding  the  sexes. 
The  male  eyes  when  dichoi»tic  will  always  present  an  angularity  that  is 
wanting  in  the  other  sex,  and  there  is  always  some  narrowing  of  the 
front.  The  female  front,  though  sometimes  considerably  narrowed, 
always  has  the  margins  straight,  without  angulation.  In  a  few  genera, 
all  holoptic,  the  males  show  areas  of  enlarged  facets  near  the  upper 
porti«)n  of  the  eyes.  Tliis  enlargement  is  most  noticeable  in  AlUujrapta 
and  Catabomha,  but  is  also  indicated  in  the  forms  related  to  Xijlbta. 
Although  I  do  not  know  the  habits  of  Catuhomba,  one  can  safely  say 
that  those  with  this  enlargement  are  disposed  to  hover  motionlessly  in 
the  air,  and  are  especially  well  gifted  with  rapid  flight.  The  male  eye 
freipiently  has  a  greater  pilosity  than  the  female,  as  it  is  also  often 
larger. 

In  a  number  of  genera  there  is  a  greater  development  of  the  lower 
part  of  the  front  in  the  male,  forming  a  protuberan(;e  upon  which  the 
antennae  are  located.  This  is  most  apparent  in  the  genera  allied  to 
Milesia.  There  is  not  much  ditterence  in  the  antenuiti.  In  a  number  of 
genera  (e.  g.,  Chrysotoxiim,  Chilosia,  Brachi/opa,  Volucello,  Sericomyia, 
etc.)  the  third  joint  is  larger  and  broader  in  the  female,  and  in  some 
the  arista  is  less  plumose,  in  the  structure  of  the  face  the  most  impor- 
tant variations  will  be  found  in  Mtjiolcpta,  where  the  male  is  provided 
with  a  small,  but  prominent,  tubercle  near  tlie  middle,  whicli  is  wanting 
ill  the  female.  Similar  ditloreiiccs  will  be  seen  in  some  other  genera, 
as  in  species  of  Chilosia,  Clirijmf/atifer,  and  I'tcntllaNtis.  The  other  dilt'er- 
ences  between  the  sexes  have  already  been  adverted  to.  In  the  mouth 
organs  I  have  observed  but  slight  sexual  dillerenees;  in  some  few  gen- 
era, as  in  Criorhina  spi).,  the  female  proboscis  is  longer  than  that  of  tins 

nniles. 

In  the  thorax  I  know  of  no  structural  sexual  dilb'iences ;  n(»r,  so  far 
as  I  am  aw..re,  do  any  such  exist  in  the  wings. 

In  the  abdomen,  in  addition  to  the  |)rimary  characters,  no  ditf'erences 


t 


ii 


I  i 


m 


I. 


of  importance  present  tliemselv 


es. 


The  shape  in  the  male  is  frequently 


276 


MULLETIN    y,\,    IINI'I'KU    STATES    NATIONAL    MUSEUM. 


r: 


i! 


inoie  sI«.'ii(U'r,  and  with  ^'iviitiT  convexity  above.  In  all  those  ;jeneia 
(Ceria,  Jiacvha,  Sphcijiua,  cic.)  wlieie  the  abdomen  is  clubbed  this  itiiar- 
ac'.tv  is  ii.,iie  i»r(inoiin<;ed  in  the  male.  In  the  genera  allied  to  Mallota 
the  male  alxlomcn  is  toand  more  (;ylindrical  toward  the  end. 

The  most  iinpoiiant:  sexu.il  cliaracters  are  in  the  male  U'^s,  ami 
probably  subserve  some  |air|>ose  in  the  sexual  relations,  although  siicli 
must  (»fren  bi'  dilliculi  to  understand,  where  otherwise  closely  allied 
»;pe<'ies  diller  marKedly  in  their  presence  or  absence.  In  the  front  pair, 
PlatjichiniH  and  Pi/roplia'^id  tnj/nii  nve  the  only  ones  known  to  me  where 
stru(!tural  dillerences  are  seen,  the  libiie  and  tarsi  beiny  moie  or  less 
dilated  in  tlko  male,  and  tlie  saaie  sex  sometim(>s  provided  with  lemoial 
bristles.  Dilfere'iices  in  tiie  middle  paii-  are  contin(;<l  to  Pj/yoplinna  oct/nii 
and  some  species  of  Pli(f!/cliirii.s,  where  likewise  may  occur  a  dilatii.ion 
of  the  tarsi  and  srru<!tural  ix'culiarities  of  the  tibiae  When  we  eoiue 
to  the  hind  ]y,\\v  tlu;  most  nnmerors  an<l  strik  inj>'  plastic  ditt'erences  {nv 
sent  themselves.  In  the  <!ox;e  there  is  sometimes  a  more  or  less  prom- 
inent spur  or  process  on  the  inner  hind  side  in  the  male.  In  Pipiza 
{Cnemodon)  this  maj'  be  long  ..ad  slender,  but  usually  it  is  conical,  as 
will  be  observed  in  Triodonta,  Xi/lota  sj).,  etc.  In  the  femora,  wherever 
there  is  thickeniuj;"  it  is  usually  n'ore  i)ronounced  in  the  male,  as  in 
McHOiirapiu  sp.,  and  jjenei'a  of  the  Eristalini  and  Xi/lothii.  In  some  of 
these,  as  for  instance  Mesngrapta  f/emiuata  and  Mallota,  the  male  femora 
aref,  in  addition,  more  arcuate,  sometimes  very  much  so.  In  not  a  few 
genera  the  male  is  provided  with  one  or  more  ])rojections  on  the  under 
side  of  the  thickened  femora.  (In  Milesia  and  tSpUomyia  ($,<?)  there  is 
a  conical  projection  near  the  outer  end.  In  Senogastcr  it  is  tlattened 
and  bitid ;  in  others  it  takes  the  shape  of  an  angular  projection,  iimst 
prominent  in  Tropidia.  In  some  genera  (9  ,  S  )  (as  A'l/lota,  Bnichi/ptil 
pus,  Brachyopa,  and  especially  Syritta)  there!  is  a  row  of  spines  or  short 
bristles  on  the  under  side;  in  Lcpromyia  and  species  of  MyioUpfa  this 
character  is  found  below  all  the  femora,  which  are  also  all  thickened). 
In  oidy  one  case  [Tropidia  mamillata)  do  1  know  of  a  long  and  cylindri 
cal  process  near  the  basal  end  of  the  femur.  In  the  hind  tibia'  there 
are  also  dillerences.  The  most  common  are  greater  curvature  and  (;oiii- 
l)res8ion,  especially  in  those  cases  where  the  femora  are  thickened.  An 
excellent  example  will  be  found  in  species  of  Mallota.  In  some,  as  in 
Spatigaster,  etc.,  the  bending  may  be  sharp,  almost  angular ;  in  others 
the  tibite  are  provided  with  more  bushy  and  long  i)ile  in  the  male.  In 
Helophilus  s])p.,  EnHtalin  s\)\).,  A'»/?ofa  spj).,  Triodonta,  and  other  generii, 
the  tibite  (  S  )  are  provided  with  a  more  i)ronounced  spur  at  the  tip. 
In  Mallota  s[).  and  Tcucltoctiemis  there  is,  in  addition  to  the  tlattened 
tibite,  a  strong  projecting  spur  in  the  middle  in  front,  which  lies  on  tiie 
inner  side  of  the  femora  when  flexed.  In  Jlrachjipalpun  J'roiitoNKs^  and 
in  certain  exotic  genera,  there  is  a  smaller  projection  n<ar  the  base  of 
the  tibite.  In  the  hind  ttirsi  the  only  sexual  character  with  which  I  am 
acquainted  consists  in  a  thickening  and  elongation  of  the  hind  meta- 
tarsi.   This  peculiarity  finds  its  greatest  and  remarkable  development 


SYNOPSIS    OF    NORTH    AMKRICAN    SYRPillD/E. 


27' 


o  « I'll  CI  a 
liis  ('liiir- 
;)  Mall<)f(( 


Ugh  siicli 
ly  iillii'd 
out  i)iiii, 
lie  wlicic 

Hi  Ol-  ll'.s.S 

I  Iriiiuial 
•U(i  ocjfnii 
Jlatiijoii 
we  come 

'lU'CS  piv 

OMS  plOlll- 

lii  I'ij>i:<t 
)iii(Ml,  as 
w  lu'i  t'vei 
ale,  as  in 
II  some  oi 
lie  femora 
not  a  few 
;lje  niuler 
5 )  there  is 
I  tlatteiied 
tioji,  must 
'irarhijpdl 
!S  or  short 
>h'2>fit  this 
lickeiied). 
I  e.vlliidri 
ibia;  there 
and  eoiii- 
nied.  All 
onie,  as  in 
in  others 
male.  In 
er  jieneia, 
Lt  the  til), 
flattened 
ies  on  tlie 
toNiis,  and 
le  base  of 
liicli  I  ail) 
liiul  meta- 
velopmeut 


in  Mlcrodon  {Ubristcs),  but  is  also  seen  in  many  of  the  Chilosini  and 
Mclanostoniini ;  rarely  if  at  all  in  the  J-Jri.sfnlhii.  and  fcdlowiny  groiii)s. 

In  coloration  and  pilosity  by  far  the  {rreater  number  of  spe<;ies  otter 
<listinct  dilfereiices.  The  most  strikin;^'  example  of  this  is  seen  in  Trio- 
diiiita  ciirvipcs,  where  the  male  abdomen  is  red  and  the  female  black; 
sinj;iiiarly  tiie  hind  lej-s  in  tliis  species  otler  more  sexual  jteculiarities 
than  in  any  otlier.  In  some  sjtecies  with  banded  alulomen  the  yellow 
markings  show  a  j;reater  teiideiuty  lo  coiilluence  in  the  lemale.  In 
many  the  markiiifjs  of  the  abdomen  are  more  couspit-uons  in  the  male, 
or  obsolete  in  the  female;  specties  of  ih'istdlis  and  HclophiluH  will  be 
recalled  as  exami)les.  Aj^ain,  in  the  male  there  is  sometimes  a  ten- 
<lency  to  melanism,  in  the  anteiuuu  (e.  ;i'.,  (JliHoNi(t),  the  le«;s  (Si/rphufi), 
face  (ibid.),  (!oloration  of  the  abdomen  {Cliilosta,  >S])hc(/ina),  and  thora.x 
{Ilelophilus).  As  a  }i,eneral  rule  the  male  coloraticui  is  more  strongly 
iiidi«tated:  such  we  know  is  in  conibrmity  with  the  general  zoidogical 
law,  that  the  male  shows  the  greater  number  of  ornamentations,  both 
in  color  and  structure.  In  the  male  the  pile  throughout  is  freipiently 
longer,  more  abundant,  and  sometimes  darker  in  (;ol()r. 

None  of  the  foregoing  sexual  dill'erences  appear  to  be  chara(;teristic 
of  the  family.  Thus,  holoptic  males  are  ])redo!niiiaiit  throughout  the 
order;  diiierences  in  the  size  of  the  anttMime  may  be  met  with  in  the 
J/M.s'CvV/ff,  etc. ;  similar  or  allied  structural  variations  in  the  legs,  in  the 
ladnnuliv^  DoHclioptKlida;  Mitla.si(}a\,  Asilithr,  etc.;  of  the  abdomen  in 
Stratiomyida;  etc.  On  the  other  hand,  sexual  dilVeremtes  in  the  wings,  as 
in  the  A.s77/V/a',  and  ce'tain  ornamentations  of  the  h'gs,  as  in  Aailida', 
Tachinifla,,  J)ollcliop(>(li(l(V,  Einpida',  etc.,  do  not  occur  here. 

What  is  the  purpo.se  of  these  .sexual  peculiarities  .'  This  is  a  (piestion 
easily  a.sked,  but  far  less  readily  answere<l.  nly  this  may  be  said: 
their  use  in  general  does  not  appear  to  lu'  commensurate  with  their 
oftentimes  striking  develoinnent.  Sjtecies,  otherwise  clo.sely  allied, 
.sometimes  show  remarkable  dill'erences  i:i  tnis  respect.  Thus,  Ifclophi- 
luH  distiiictus  and  II.  clir}/.sosfomii.s  are  so  closely  related  that  they  ap- 
parently have  been  hitherto  confounded,  yet  in  the  ftumer  the  male  hind 
coxie  bear  a  strong  spur,  wanting  in  the  latter.  Very  ch)sely  allied 
species  of  A'^/o^M  show  the  .same  peculiarity.  Tropidin  UKdnilliitti,  not- 
withstanding  the  well-developed  basal  femoral  process,  does  not  «liifer 
much  Irom  T.  quddraht.  The  same  may  be  .said  of  7'.  ndeartilii,  with 
its  coxal  si)ur.  Mcsixjnfptu  {ivminula  and  .1/.  ptirniUi  are  closely  allied, 
yet  in  the  lormer  the  inah'  hind  I'emoia  ;  •  thiitkened  and  arcuated. 
The  terminal  tibial  sjjur  in  Ilclopltlhis,  Xi/Ioih,  cK-.,  is  very  uncertain  in 
its  appearance,  while  the  internal  median  spur  in  Mallotn  ciiuhicijhniii.s 
appears  only  to  be  a  dini()ri)iiic  lu'ciiliarity.  Similar  <iiinori»liism  ap[»ar- 
e:itlv  exists  in  such  species  as  Scpftoii  tiniidfiis  and  N.  piisillus,  for 
iiistimce,  in  the  ScioDiifzidu'.  There  certainly,  liov,  ;'vei,  .seems  to  be  a 
functional  i)urpo.se  Ibr  these  .structural  <U'velopmeiits;  the  only  thing 
surprising  is  that  their  possession  so  otteii  appears  to  have  no  «'!l'ect 
upon  other  characters.     We  can  readily  imagine  that  the  iircce.s.ses  and 


'*!' 


I. 


If 

lu 

\ 

1 

V.  V 

(. 


V    I 


I 


II 


{ 


I 


,:! 


II  'I 


hi 


m 


278 


HrLI.ETIX    31,    UMTKD    STATKS    XATIONAI.    MUSKUM. 


strenjitlu'uiiif;  of  tlio  liiiid  l(\u.s  inny  be  ciiiitloycd  in  tlic  scizii)";'  iuid 
retention  of  the  female,  but  why  liave  these  iietiuired  ju'culiaiities  ncit 
ha<l  a  j^reatt-r  result  u|>om  the  spt-eies/ 

Another  (juestion,  iinjiortant  to  all  systematic  eiitoinolo^iists,  aiises 
from  their  diseussion.  Are  secondary  sexual  eharaeti'rs  servieealde  as 
g'eneri(5  charaeters  ?  Contrary  to  tlie  oi)inion  of  many  stu<lents,  1  hold 
that  they  are.  It  may  strike,  one  as  absurd  that  the  sexes  may  l)e  lo 
cated  uiidei'  ditlt-reiit  genera,  but  we  must  bear  in  mind  that  a  sjM'cii's 
is  composed  oi"  hoih  sexes,  and  it  is  by  the  totality  of  characters  that  a 
genus  is  bounded.  But  such  characters  can  not  be  indiscriminately 
used.  Sinjile  dill'erences  of  any  kind  are  suspicious  when  not  acconi- 
]»aiMed  by  others,  and  sexual  chaiaclers  should  be  avoided  as  far  as 
possilile  when  both  sexes  cannot  be  delined,  Anioiiu'  the  J)<>licli<>p()<lul(v. 
no  rich  in  male  characters,  species  as  zoological  entities  rest  chielly  in 
the  nude;  the  female  is  a  re])roducin<i'  orfjan,  lik«i  the  spermiferous 
barnacle.  Chissiticalion  is  made  no  moie  dillicult  by  the  use  of  such 
characters,  and  is  sometimes  much  simi)litied:  besides  it  may  briny 
related  forms  toyetiuT;  and  is  not  this  tlu'  leal  end  of  scientitic  ehissi- 

flcation  i? 

GEDGTJAPIIIOAL   WISTRIIUTTION. 

In  their  ffeo<4rai)hica!  distribution,  at  least  so  tar  as  the  North  Anu'r 
ican  tauna  is  conc.iiied,  the  StirphuUv  present  no  rennirkable  facts. 
thou<j:li  not  Ji  few  ol'  interest.  Tiie  Uiosl  noteworthy  one  is  the  wide 
distribution,  in  j;eneral,  of  yenera  and  species.  We  ha\e  very  few  pe- 
juliar  jieiu'ru,  and  fewer  still  are  aberrant  from  well-known  tyj)es. 
NauHif/astcr  bein^',  ])eihaps,  the  most  worthy  of  note  in  this  respect. 
Forty-two  {genera  ate  (;ommou  to  Europe  and  Xorth  America,  and 
nearly  thirty  of  o'.i\  species  are  known  to  be  <;ommon  to  the  two  con- 
tinents, and  it  is  very  probable  that  this  number  will  be  increased  by 
not  a  few.  Xuusii/anter  is  so  far  known  only  from  North  America,  but 
it  will  undoubtedly  be  found  to  occur  in  South  America.  Mesogniptd 
is  a  peculiarly  American  jienus;  indeed,  it  may  ])ro])erly  be  called  the 
characteristic  j^enus  of  our  fauna,  not  only  on  account  of  its  restriction 
to  this  continent,  l)ut  by  reason  of  the  larjjfe  number  of  species  and  the 
multitude  of  individuals.  Mr.  Bigot,  it  is  true,  has  described  s])ecies 
of  McHograpta  from  New  Caledonia,  but  it  may  most  safely  be  said  that 
his  determinations  are  wrong.  Asarlina,  from  Alrica,  is  its  nearest 
extra-American  rei)resentative.  Copestylum,  though  not  differing  very 
markedly  front  VolKcella,  may  also  be  considered  an  American  type. 
Pterallastes^  TeuehociicmiH,  and  ThWoh/^,  though  so  far  known  to  in 
chule  (udy  North  American  species,  are  feebly  characterized,  and  can 
hardly  be  taken  into  ac(!Ount  as  distinctive  American  tyi)es.  Nor  is 
Crioprora  a  much  betti-r  exam))Io,  some  of  the  10uroj)ean  Ilraclii/i><tlpi 
api)roaching  it  closely.  Eupcodes,  MrrdpioidiiN,  and  Seno<pi,st<'r,  on  tiie 
otiier  hand,  are  we!!  dilf«'rentiiil  ■  <l  American  lorms. 

A  coiiii»aris(»n  nl  tlie  lv,iro])i';in  an<l  Nortli    Vnicrican  genera  wil!  be 
of  interest,  tiiougii  in  general  only  iDulirining  certaui  laws  of  distribu 


SYXOPSI.*:    OK    Xoinir    AMI-JMCAN    SYRIMIID.E. 


219 


tioii  that  Ijjivc  i(>!in  hciii  ('st.il)lisIi(Ml  in  oilier  hiiiiiclics  of  systciDJitii* 
biolojiy.  I  mciiii  tin-  ^-riMicr  icscmhIiiiK;*-  Ix'twcfii  tlu>  Pucilic  iiiid  Kmo- 
IH'iiii  t'lmiiiis  tliMii  hctwci'i!  the  Atlantic  and  lOiiropj'an.  Of  course  \vt> 
can  ,Vi't  ou]y  spe.ik  <ih  mm  tlisrr  imntcs.  Tlie  Wesleiii  fauna  is  not  yet  by 
any  means  well  Unown,  hut  what  is  known  is  sutlicient  for  the  purpose. 
Thus,  the  yenus  6V//7o.vm,  coiilainin;;  nearly  one  liuiidi-cd  ICuKipean  spe- 
cies, is  very  sparingly  represented  in  tlie  Eastern  States,  but  seems  to 
bo  rieh  in  the  West,  and  that,  too,  in  lOur^ipeati  forms  (hairy-eyed)  not 
yet  discoveied  east  of  the  mountains.  Xearly  the  same  may  \h'  said  of 
Spluvroplioiiti,  MrhniosloiiKi,  :\iu\  rhili/chirus.  iSi/rplnis,  >ii)  abundant  in 
Europe,  lias  so  far  fnc  species  peculiar  to  tli.  Ivist,  ten  to  the  \\'est, 
and  eiyht  in  comnntn.  ArctupliiUi,  J'ocdid,  and  certain  species,  occur 
only  in  Europe  and  Western  America.  The  ride  has  Iteen  so  often  con- 
tinned  that  it  may  be  accepted  without  hesitation,  1  think,  viz:  that 
Eastern  American  sjiecies,  identitral  with  Euro;, can  ones,  Imve  usually 
a  distribution  across  the  continent.  On  the  other  hand,  the  example  of 
Cuiuhotnhd  piiidNtri,  an  lOuropean  spe(  ies  found  in  ;j;reat  abundance  in 
the  Western  but  not  in  the  iOastern  r<'^non,  is  a  tact  bearing;  in  tlie  same 
direction.  To  this  last  si)ecies  !  think  we  may  safely  add  J-Jristali.s  Icmix 
as  bein;4  i)rimarily  Western,  but  which,  during'  late  year.^,  has  been 
distributed  from  the  West  eastward.  I  have  no  explanation  to  }iive 
of  how  the  I'^iiropean  species  have  reacthed  the  Western  rej;ion,  if  they 
are  not  in  reality  indigenous  there,  whether  by  way  of  the  Atlantic 
States,  or  whether  the  species  common  to  the  two  sides  of  tlie  conti- 
nents have  traveled  from  West  to  East  ;  but  I  certainly  think  in  some 
cases,  such  as  that  of  Eristalis  lemix,  it  has  been  the  latter  way. 

Of  all  the  numerous  species  common  to  Europe  and  America,  very- 
few  are  confined,  so  far  as  wc  know,  to  the  Eastern  States,  and  every 
new  examination  of  Western  nmterial  subtracts  from  the  number.  The 
larger  number,  so  far,  of  those  genera  peculiar  t;>  Ameri(-.i  are  found  in 
the  East,  and  nearly  all  the  American  genera  common  to  Europe  are 
found  in  the  West.  Exceptions  to  this  are  seen  in  Eupcodrs,  Pelecoiera, 
Somula,  and  especially  Rhbujin^  etc.  Again,  such  genera  as  Microdon, 
Xanthogramma,  Ccria,  etc.,  seem  to  indicate  that  those  genera  with  few 
species  in  Europe  are  best  represented  in  the  Eastern  States  ;  but  the 
facts  wdl  allow  us  to  ])redicate  but  little  here. 

In  speaking  of  the  Western  fauna,  I  refer  especially  to  the  region 
limited  by  climatic  conditions,  and  not  extending  further  east  than 
Western  Nebraska,  Middle  Kansas,  and  Texas.  From  several  years' 
active  collecting  in  Western  Kansas,  I  long  ago  recognized  the  almost 
sharp  limitation  of  si)ecies.  In  some  cases,  especially  among  Ccdeop- 
tera,  the  eastern  lines  of  habitat  could  be  traced  almost  as  clearly  as 
the  tioral  habitats  on  the  mountain  side. 

Yet  another  i'iwX  of  great  interest  is  the  entire  absence  of  several 
large  European  genera  in  our  l';\nn.\  —  i:ii)ucnis  and  Meroflon  especially. 
It  is  very  doubtful  whether  the  former  will  ever  be  found  in  the  United 
States,  i)articularly  the  Eastern  ones. 


I   i| 


5     II 


;■  >' 


280 


HILLKTIN    :{1,    UNITKD    STATES    NATIONAL    MUSEUM. 


I  have  t'lideavort'cl  to  sum  up  our  knowlc'.ye  of  tlio  geograpliical  (lis 
tribution  in  the  lollowiuf,'  table.  It  will,  oi  eourse,  be  understood  thai 
the  data  of  the  occurrence  of  yenera  (in  their  modern  Hifj^nitieation)  iii 
Asia,  Alriea,  and  South  America  are  yet  meager,  but  I  have  given  .such 
as  I  have  been  able  to  obtain.  The  occurrence  of  genera  is  intlicated 
by  asterisks,  which  are  replaced  l)y  llgures  when  species  are  known  to 
bo  comnu)n. 

Tabular  synopiiia  and  geuyrujiltkal  divtribittiuii  0/  (jcncra. 


a«nera. 


Microdon 

(;lir.VMOt()xum 

ParnuuH , 

NiiiiHij;iister. . 

I'ipiza.   

P.silotii 

('lit  Nso^iiHtor. 

Oliilosia 

MclaiKwtonia. 

I',vr<)|ilKniiii 

I'ial.vrliirua  .. 
LuiicDzona  ... 
(Jalalioiiilia ... 

Ku|IIHIllv8 


s. 


^ 

12 

« 

6 

3 

4 

2 

1 

u 
1 

8 

14 

12 

2 

5 

1 

1 

1 

Svipliiis I      23 


l)i«l<'a    

Xantlio^irainma 

AlUiyniptii 

Mesotirapla 

S|ili!i'i'o])horia . . 

I'ohH'ociTa 

>.'e()ascia 

SphoKina  

Bacclia 

Clialcimiyiu 

Mvidlcpta 

ItliinKiii 

Kii!!<'i>ianiyia... 

Uiachynpa 

Voliicclla 

CopH.styliiin 

Sericoinyia 

Aictophila , 

Kristalis 

Doliimyrphua  ... 

Ptcrnptila 

IIolopliiliiB , 

Pti'iallastt'B   — 
Tciirliocnemis.. 

Mallota , 

Tnoiiouta 

Tiopiilia 

Oiorliiiia , 

Ciii'inoia 

Pocola , 

Bniilivpalpus  . ., 

XylDla 

St'tinjiaster 

Syiitta , 

('liry.siiclilamya 
ili'iapiddiis  ... 

Spiloinyia 

Tciinio- Ionia  . .. 

Mil.'sia  , 

Splicconiyia 

C<  ria 


Total. 


2 
5 
2 

5  I 

V 

2  I 

4  I 

10  i 

1 

4  I 
1 

1  I 
3 

"i 

0  ! 
1 

20  j 

1  ' 
1 

19  ! 

1  ! 

2 

3 

1 

3 
12 

4 

1 

0 
21 

1 

1 

4 

1 

(i 

() 

1 

3 

0 


14 
1 
4 
3 
1 
1 
1 


1  I 
4 

2 

6 
1 
1 
1 
5 
1 
1 
1 


12 
1 


304  I    ir.> 


p. 


2 
3    . 

1  I- 


4 

0 

10 


1 
1 

10 


1 

10 

1 
1 

1 

7 
1 


2 

1 

* 

* 

0 

* 

1        8 

4 

* 

3 

1 

4 

2 

8 

U 

a 

o 


a 
3 


a 
a 

V 

C 
o 


* 

' 

• 

* 

» 

1 

* 

/ 

i 
1 

* 

* 

■■,    ■ 

1 

1 

5 

« 

•■• 

( 

* 

A 

* 

10(i 


56 


1 

* 

1 

* 

27 


»      I 


12 
10 


10 

1 

;i 
.1 


24 
4 

11 
5 
3 


4 

2 

28 


18 


4 

n 


1 
lit 


•      \^ 


SYNOPSIS    OF    NOKTII    AMERICAN    SYllI'HID.f:. 


281 


.... 

if 

..... 

.( 

* 

* 

'iA 



11 

" 

3 

* 

1 

* 

:< 



1 

..... 

* 

4 

..... 

28 

* 

* 

* 

18 

* 

5 

* 

4 

* 

11 

1 

* 

i:! 

* 

1 

-J 

? 

4 

*) 

1 

* 

6 

GEOLOGICAL   DISTUIIUTTION. 

Tiinmjili  llu'  (((iirtesy  of  Mv.  8cn<l<li'r,  I  wa.s  ciiiihlcd  to  t'.xsiinino  his 
«toII«'(!tioii  of  speciiiu'iis,  and  tiie  (lra\viii;^f.s  for  liis  forthcoiiiiii;;'  work  on 
fossil  insects,  in  tiiis  faniily.  Tiic  spt'CMniens  arc,  many  of  tluMii,  in  a 
truly  rcinarliabic  state  of  preservation,  admit  tinj;  fre(piently  of  definite 
and  dc(!i<led  opinions  as  to  tlieir  rclatictns.  Of  the  tliirty  or  more  spe- 
cies whicli  Mr.  Scmlder  had  sepan-ted  otit,  I  was  first  strnck  witli  the 
fa<!t  tliat  pr(»hably  all  bclonj,'  to  the  lirst  division  of  the  family  with  a 
hasal  cro,<«s-vein,  a  conclusion  at  which  '.Mr.  Scndder  had  already,  inde- 
pend(MitIy,  arrived.  There  are  two  pcssihie  exceptions,  Imt  both,  in 
view  of  the  general  relations  of  the  other  si)e(-imens,  doubtful.  The 
lirst  was  the  specimen  which  Mr.  S(;udder  had  doubtfully  referred  to 
JJri.stalis  (liull.  U.  S.  Geol.  Surv.,  iii,  irA\).  As  rej^ards  this,  however,  I 
think  that  the  problematic  determimition  is  not  the  (!orrect  one.  The 
other  specimen — named  Miiesia  qnadratd  (IJull.  U.  S.  (leol.  Surv.,  iv, 
7;jli) — I  would,  contrary  to  tlu^  o|)iiMon  lirst  held  by  me,  remove  from 
this  fjrou[>.  The  neuration  is,  in  lar^e  part,  conJe(ttiiral,  and  in  all 
juobability  has,  as  .Mr.  IScuddor  described,  a  basal  cross  vein,  removinj;' 
it  from  Milesid  and  its  con;;;eners.  The,  species  is  unusually  larye  for  a 
t\ifrplius,  but  yet  its  atUnities  are  evidently  with  that  {jenus. 

The  ne.\t  most  strikinj^  point  observed  was  the  |»redomiiiance  of  the 
S!/r2)huii  forms.  The  largo  number  of  the  species,  as  well  as  specimens, 
belong  to  this  genus  in  apparently  a  narrow  sense,  and  many  of  them 
are  peculiarly  characteristii^.  SingiUarly,  all  of  them  apj)eared  to  have 
the  abdonunal  cross-bands  interrui»ted  or  emarginated.  In  none  did  I 
lind  (Mitire  bands  as  in  S.  ribcfiii  or  Lcsiieurii.  Xot  a  few  had  the  i)ic- 
ture  very  like  that  of  Ditha  ht.m.  The  neuration  in  all  showed  much 
nniformity.  The  anterior  cross-vein  is  basal  and  oidy  rarely  with  any 
marked  degree  of  obliquity.  In  the  larger  inunber  the  third  vein  is 
straight,  or  anteriorly  convex,  but  occasionally  gently  sinuous,  as  in 
C((tatomh;(  lujfasti-i,  for  in.stance.  A  very  noticeable  tendency  was  ob- 
served in  the  termination  of  the  third  vein  near  or  beyond  the  tip  of  the 
wing,  as  in  lihinfi'm  and  some  species  of  ChiUmii, 

Chryttof/astef  was  identilied  with  consideral)le  certainty  in  specimen 
No.  12021.  Tlu'  prolile  of  the  head,  moderately  elongate  antenna*,  size, 
metallic  coloration,  apparent  i)nnctnIation,  and  what  seemed  evidently 
rugose  markings  on  the  front,  mv,  all  strongly  characteristic.  The  neu- 
ration is,  however,  more  like  that  oi'  tSi/ipliKs  or  Clillo.sid  than  that  of 
the  typical  ('lirij.w<io.s1fr:  nevertheless  1  should  feel  little  hesitancy  in 
placing  the  species  in  the  genus  in  the  sense  accei)ted  for  our  iVmerican 
species.  Another  species  (specimen  No.  5102)  is  very  characteristic;  of 
«S/;//r*7/«(f,  although  the  structure  of  thi'  iiead  could  not  be  made  out. 
The  size,  thickened  hind  fenuua,  provided  with  spines  below,  and  the 
elongate  spatulate  shape  of  the  abdomen,  were  especially  striking.  Tli«> 
neuration,  so  far  as  could  i)e  lUiide  out,  is  Spluyina  Vilm. 


r 


I 


I  i 


I*  m 


2H2 


lULLKTIN    ni,    rNITED    STATI'.S    NATIONAL    MVSKl'M. 


i  . 


•  hr 


NmiM'Tons  Hpcciiiicns  ol'  Cliihisiti  li;ivc  hccii  tlotcniiiiK*!,  sunir  ol"  llicn. 
with  (HTlaiiity,  Ity  tlit;  t'aciiil  itrolilc,  iiiitcniiic,  coloiation,  nciiiation. 
slui[»e  ((fabdoiiM'ii,  iiiid  slriictiiit'  of  h't-s.  Pcrliiips  tlic  iiiosi  cliaiiict*'!  ■ 
istic,  is  spt'ciiiicii  Xo.  STSl,  whicli  lies  upon  the  siih*.  ;;i\  in;;  an  rxccHcnl 
jn'olih'  ol'  th«»  iu'ad.  Otiicr  .spccinicns  sccnicd  to  appioiich  rijti-.ti  m 
I'xilota^  lhon;;h  on»^  coidd  not  say  with  absolnfr  ct'itainty  that  these 
ycneni,  in  their  inoih'i  ii  aecM-ptalion,  aetnally  oeeiir  anion;;  theni,  thoM;;li 
i  very  much  tliink  tiial  oii«>  or  l)()th  (h). 

liliiiH/ia  seemed  to  be  reeo;;iii/abh' with  snllicii'iit  eeitainty.  the  de- 
termination based  npoii  cohn  ition,  shape  of  ai)(h)men,  hii';;e  \\in;;s  ami 
ahnost  typical  nenration,  and  sien<ler  h';;s,  especially  well  .sliown  in 
s|>ecimen  No.  1 1(M)!». 

It  may  safely  l)e  said  that  Si/rj)liii.s,  Cliihi.sid,  Chriisoiiaslcf,  h'lihiiiia, 
and  Spliiii'ina  oeeur  in  the  American  Tertiary  beds,  to  wliicii  may  in  all 
probability  be  added  Vipizd.  There  is  yet  another  form  whicli  could  not 
be  located  in  any  of  the  known  existin;;'  North  American  .genera  with 
certainty.  'I'lie  specimen  (No.  Tti:?."))  w  of  i;>r;:'e  size,  in  shape  much  like 
that  of  Mdllotd,  the  hind  femora  apparently  much  thickened,  the  an 
tcnntu  ronndtMJ,  the  penultimate  se(;tioii  of  the  Ibnrtli  vein  Ion;;,  and 
the  anterior  cross-vein  basal  and  ieetaii;;nlar.  The  form  is  nearest 
allied  to  Mii!<>lt'i>fd. 

In  conclusion,  1  cannot  refrain  from  exju'essin;;-  my  admiration  of  tin- 
]K'rfe(!tioii  and  accuracy  (d"  the  diptei'olojuical  drawinj's,  and  the  can 
with  which  the  specimens  have  been  studied  by  Mr.  Scudder.  ^Ir. 
Scudder  has  j^iven  u  .summary  of  our  i)resent  knowled^'c  of  insect  pale 
ontolo;;y  in  I'rofes.sor  Zittel's  Ilandbuch  der  Paleontoloj;ie,  from  which 
the  following;'  is  ;;iveii  to  com|>lete  the  jiresent  status  of  our  i)aleoiito- 
logical  knowledge  of  this  family: 

"A  very  obscure  object  from  Soleidiofen  is  referred  by  VVcyenl)er;L;h 
to  Ghihma,  and  (xiebel  refers  to  a  new  jfenus,  lienielia,  a  minute  lly 
flgured  by  Ilrodie  from  the  Enjjlish  Purbeck,  but  its  reference  here  is 
very  doubtful. 

"In  the  Teitiaries  this  family  is  more  abundant  and  varied  than  any 
of  the  other  families  of  J)iptent  ci/clorrluipha.  llurmeister  and  Terres 
both  recopfnize  Microdon  at  Aix,  I'ipiza  has  been  deis(;ribed  from  Kott. 
C  hi!  OS  in  fvom  Wyomin;;,  and  seven  si)ecies  of  tSi/rphiis  from  Oeiiin;;en, 
KadoboJ,  liott,  and  Senef-ajjlis,  besides  which  it  has  been  recojjnized  in 
amber;  in  amber,  akso,  are  found  two  peculiar  yeiiera  allied  to  Asciaaud 
Xylota,  besides  Cliilosid,  Voliicella,  and  (Jriorhina ;  Rhimjia  is  noti<'ed 
at  Aix,  Erisfdlis  described  from  Utah,  IfelnphUux  and  Mcrodon  from  the 
Khine,  and  Milcsia  from  \Vyoniiii!i;'.  Jiastly  some  thirty  or  more  species 
of  various  ;;enera  occur  at  l-Morissant,  and  a  considerable  number  of 
them  in  a  remarkable  preservation. 

"There  are  descriptions  of  Pipizd,  Syrphus,  Mcrodon,  and  Ilelojyhilus.'" 


VM 


sYxcu'siH  or  xoirni  amkimcan  syim'IIID.e 


2H3 


Tilt'  Aiiit'riciiii  fossil  sp«'i'i«'s  jiliviidy  (IcscrilM'd  an*  tlu'  followinpf: 
Eiistalis  lapideua  Siinltli  r,  Itull.  l'.  S.  (icol.  Siiiv.,  iii,  T.'tti. 

liiiKL'tl  Upon  an  iinpcrt'cct  spcciiiK-ii,  and,  as  hi'lorc  Hlatcd,  probably 
not  b(>lon;;ni^  to  tliis  ^'iMiits. 


Milesia  quadrata  Sc mliU  r,  Mull.  U.  s.  (;imi1.  Siirv.,  iv,  7.V2. 

I'roba 
Chllosia 


a  Milesia;  sec  remarks  on  previous  page. 


impla 


iiiliItT,  Hull.  r.  S.  (Ii'dI.  Siirv.,  iv,  /.Ml 


Most  probaltl.v  a  true  Cliilosia. 


CIIlfONOT.OOIf'AI,    IJST    (*V    OKNl'-UA. 

In  tbei  (bllowinj;  list  I  liave  endeavored  to  ^-ive  all  the  j-etu-ric!  nanien 
hitherto  i>roposed  in  the  luiiiily  of  S/irjiliithv,  arranged  clironolo^iicially. 
Such  names  as  !  believe  t«)  be  well  founded,  or  \vlii(;li  1  cannot  iind  any 
reliable  data  as  to  tiieii-  synonymy,  are  printed  in  heavy  type,  in  order  io 
distin;;uish  them  from  those  which  are  believed  to  be  synonymous.  The 
latter,  |)rint<'d  in  italics,  it  will  be  observed,  are  preceded  by  nundu-rs 
indicating  their  synonymy.  I'ndoubtedly  from  amonu  the  foi-mer  (ttliers 
will  yet  be  shown  to  be  synonyms,  and  from  the  latter  not  a  few  may 
be  finally  accepted  as  sub}j;eneric,  or  as  applyin;;  to  species  sidli(!iently 
distinct  tojustify  their  use.  1  have  jfiven,  in  brackets,  such  <(f  the  various 
spellings  as  I  have  been  able  to  find.  The  habitats  giviMi  are  of  the  type 
species. 

1763. 
1. — Rhingia  [llhiingia']  Scopoli,  Eiifi>iii.(/'ariii<)l.,  -iM.     Europe. 

1764. 
2. — Volucella  (icolVroy,  Hi.-st.ilrH  iiisfctcs  dt-s  environs  do  Paris,  ii. 

1775. 
3. — SyrphuB  Euhriciim,  Syst.  I'.iitom.,  7(W.    Eiuoiio. 

1794. 
4. — Ceria  FiiliriciuH  (noil  Sciipoli,  ITOiJ),  Entoin.  Syst.,  iv,  277.    Europe. 

1801. 
2. — Ccnt)//a«^r  Dnmdrili,  Expos,  ct  (lict.d'liiBt.iiat.    Europe. 

1803. 
5.— Chrysotoxum  Mei};*'",  in  Illijifr's  Mufj.,  ii,  "250.     Europe. 
6. — Spilomya  [>'>;i7om,i//</,  'Spuhmiiali  Mcigen,  ibid.,  •73.     Europe. 
23. — UeliophiliiH  Mi'ifjfn,  iliid.,  ii,  '27'.\.     Europo. 
7.— Chrysogaster  Mci<,'fii.  i'>nl.,  '-i^t;     Europe. 
8.— Doros  Mfif^iMi,  ibid.,  "274.     Europe. 
9.— Sericomya  [m//ifl,  ?H,i/ifl]  Meij^eii,  ibid., '274.     Europe. 
10.— Blophilus  [//Wo/*/m7i(.'<1  M.iKi'ii,  ibid.,  274.     Euiopo. 
11.— Merodon  Mc'i;,'rn,  ibid.,  274.     Eiiro|)t'. 
12.— Microdon  MoiK<'»,  ii>id.,27r>.     Ennnn;. 
2. — Pterocera  Mel;i(Mi.  ibid.     I'-iiropc 

1804. 
13.— PsaruB  Latrcillc,  lli.sl.  nat.  Ciu«t  ft  Ins.,  xiv,  357.     Europe. 
12.— A piirili't  LafifilU',  ibid.,  lloH.     Europe. 
14.— Paragus  Lalreillo,  ibid.,  :{;')!•.     Enroite. 
15.— Milesia  l>atieil]e,  ibid.,  :$t;i.     Eiiroi>e. 
16.— ErlBtalis  Laticille,  ibid.,  :W.\.     Eiiropo. 


If./i 


111 


284 


lU'I-LKTIN    :(l,    UNITKI)    STATKM    NATIONAL    MUSEUM. 


1809. 
37.— Baooha  (  lta<hu]  l'ul)ririiiM,  Svt.  Aiitl.,  11H>.     Kiirope. 
3.— A'tdivi  I'liliriciiiH,  iltiil.     l')ui'o|ic. 

1806. 
18.— Callicera  I'liii/er,  Fuitiiu  Uoriii..  riv.     Kiii'i)|Mt, 

1016. 
19.-  Pipiza  Fiillen.  l)i|>t.  mih-c  ,  S,M|tli.,  'ih.     Knropfl, 

1820. 
Oraptomyza  VViciUMiiiiiiii,  Nov.  Dipt. 

1822. 
-Ascia  Mi'inen  (iiitii  Hcopoli,  ITTT),  S.VMt.  HtiNclir.,  iii,  1.85,     Europe. 
Sphegina  [Sjiliiiiiina]  Mri;;cii,  iltid.,  l'X\.     Kiirope. 
Eumeros  [im]  Mt'i^iMi,  iliid.,  *J)i'.i.     l':iiro|it'. 
Xylota  MciKt'ii,  il)iil.,  "211.     Kiiri)|ic. 
Psilota  .Mt'i;;<n,  il>i«l.,  '..'.">(;.     i;iini|n'. 
Brachyopa  Mt'i<;i'ii,  iliid.,  '^(iO.     Kiiropf. 
Cheilosia  ll'hiloxhi]  M<-i^i>ii,  ihid.,  '.".Mi.     Hiiropu. 
Pelecocera  [ /V/on /•«  |  .Mri;i;t'ii,  iliid.,  :!40.     Hurope. 
Tropidia  Mt'ifr,.|i,  iiiid.,  :{4(i.     Kmcipt'. 
Mallota  .Mt'iiftii,  iliid..  lit*.     Kuropr, 

1824. 
Ceratiijiiiiiii   ICeratlinphjia,  iiliijiii]    Wicdiiiiuim,  Aimlect.  Eutoni.,  14.     South 
America. 

1825. 
Ornid'm  St.  Far(.jt'ini  mid  SiTvilli-,  I'.iicycl.  iin5th.,  x.     Europe. 
PlatycheiriiB  ll'laliirliinm}  St.  l'iir;;('iin  and  Sciville,  ibid.,  SlU.     Europe. 
Pocota  [l'loci>tn]  .St.  l'inj;<au  and  Sfrvilie,  iliid.,  .518.     Europe. 
Sphaerophoria  [Ny"'»rt/;/i()nu]  St.  I'arj;i'(iu  and  Servillc,  ibid.,  5i:t.     Europe. 
Syritta  \ Siritlo']  St.  Farjitaii  and  .Servilb',  ibid,,  8()f*.     Europe. 
Teiiinuccra  St.  rarj^eau  and  Serville,  iliid.,  7H(5, 
Temnostoma  St.  Farffeaii  and  Serville.  iliid.,  .")18.     Euroiie. 
Spbecomyia  [SplKPcomyia,  Sitheijomniu,  ■'<i>ecom!iia'\  Lutreille,  Faui.  uatur.  «lu 
Rejjne  Animal.     North  America. 

1830. 
Platynocheetus  [elim,  «'/m«]  Wiedemann,  Auhh.  zw.  Ins.,  ii,  147.     Europe. 

1834. 
MixtemyUi  IMixonijiiu,  M\ixtem!i\u'\  M;  cquart,  Hist.  nat.  dipt.,  i,  491,     North 

America. 
Criorhiiia   ICriorrhhia,  Chriforhina,  CIniorhyna,  Criorhjina^   Macquart,  ibid., 

•11)7.     Europe. 
ChjimoithiJa  Mac(iuart,  ibid.,  48H. 
Didea  Mac<|uart.  ibid.,  50d.     Europe. 
Priomi'fus  Mac(|nart,  ibid.,  .'ill. 

Senogaster  [Slnnujanter]  Mae(|nart.  ibid.,  .511).     South  America. 
Brachypalpus  Mactjuart,  ibid.,  ^)'2'.i.     Europe. 
Ocyptamus  Macciuart,  ibid.,  554.     North  America, 
Orthoiititra  Mac(inart,  ibid.,  .")():!.     North  America. 
Palilalia  Mac(|'iart,  ibid. 

1838. 
•/)tme)V(«7;i8  Newmiin,  I'iiitom.  Maj;. ,  v,  ;57v!. 
■Myolepta  \_M\iU)hpUi'\  Newman,  Entom.  Ma<;.,  v,  WTi, 
Eiiica  Meigeu,  S.VHt.  Besclir,  europ.  z\v.  Ins.,  vii,  140.     Europe. 
•l/i(Ta;>^>ma  Westwood,  Introd.  ('las.s  Ins.,i. 

1840. 
33. — Coprliiii  Zctterstedt,  Ins.  Lapp.     Europe. 


20.— 

107. 
21. 
22. 
23. 
24. 
25. 
26. 
27. 
28. 
29. 

12.— 


2. 
30. 
31. 
32. 
33. 

2. 
34. 
35. 


36. 

6. 

37.- 

12. 
38. 
16, 
39. 
40. 
41. 
7. 


12. 
42. 
38. 
23. 


V I 


J  .  "^^ 


8YN0PSIN    OF    NOUTII    AMKKICAX    HYUIMIIDi«. 


285 


43.— TriglyphiiB  [  T'-ifihiphiH']  Iau-w,  Oki'ii's  IsIm.  .Mm.     Kiiropo. 

32.  —  Mvlilhni>tiin  (  Mrlilir)ttii»\  I. new  fiiiii>  Vi-ill.),  iliid.,  .'>77.     Kiiropb. 

1842. 
44.— Mlxogaster  .M;i<'i|Murt,  Dipt,  i-xot.,  li,  'i,  14.     Soiitli  Aiiiorica. 
4S.-  Megnapis  M:i(i|iinrt,  iliiil..  '27.     KuntiTii  Aniu. 
76. — riu'iiniini  .Miiri|ii.iit  I  lion  Kliij,',  I'"l!t),  iliiil.,  .V.I.     .Noitli  Auiuricii. 
46.— Dolichogyuii  Muniiiait,  ('..'),  ihid.     cliiii, 
29.  — liiKitiiiiiiii  MiiriiMiiii,  ihiil..  (it.     Niii'.li  Ann  rica.  Iiiiliii. 
47.— Aaarkina  [.iMumtio]  .Mii<(|Mart,  il>iil.,  77.     AlVica. 

1843. 
48.— Sparigaater  [•"*/'"''.'/'"*'"■.   ■^i>iiilii<><ia"li ,,  Simtliiiia^iir,   S)>hnUi)iia»ter,  SpoMio- 
IIOKtir,  Sjinwijiihltr]  ItrtiHlaiii,  Dsaiii.  d.  vmi.  h\>.  Ditt.  I(ta.sil.,  Kttv.  Kiitoiii. 

1844. 
SQ.—l'rrdiintiiilrii  \_ii(i,  ia\  Kotidaiii.  .\iiii.  .'^c.  Nal.  di  I5<d(ij;iia  ('J)  ii,  li>.'>. 

1846. 
49.--Copestylum  Maccinart,  Dipt.  <x<)t.,  1  "^  .Kui>i)l.,  l".M.     Ci'iitral  America, 

1847. 
SO. — Somula  Mai'i|iiaii,  Dipt,  txoi.,  J'  .Siippl.,  ,'.t;.     North  Amoricu. 

1848. 
51.— Phalacromya  ["'.'/irt]  Koiidaiil,  llMain.  il.  \ar.  sp.  Uitt.     liraHil. 

1849. 
52.— Meromacnis  K'ondaiii,  .stud.  Kntoin. 

1850. 
53.  — DolichomeiiiB  .Mai(|Mart,  Dipt,  cxot.,  I''  Siijipl.,  i:?!.     Asia. 
54.— Senaspis  |  ."yii  imsitiM]  .Maii|ii:iri,  iliid.,  i:i:i.     Africa. 
55. — OrthoproBopa  Macipiarl,  iliid.,  1'  Siippl.,  1  Ct.     'raHinaiiia. 
104. — I'ohjiUnitii  .M.'iciiiiart  (iioii  l'is(diiM,  l'^il7),  ildd.,  144.     North  Amcrira. 
56.— Colloprosopa  {('oihtnuUijHi)  Ma((|nart.  ihid.,  14.'>.     'r.isniaiiia. 

I'liHin  Ma(i|iiiirt  (iioii  .lur.,  1H(»7;  in'c  Kliij^,  lH;i:{),  iWid.,  l.'iti.     \f\v  Zfalaud. 
57.— Hemilampra  (.l/(.s(>/(n/iy(r(()  M:<<'ip""'fi  il'id.,  l.">'.).     Tasinaiiia. 
4. — Sjiliiximoriilia  l-Sjiliiiximoriilia,  Stiliuiomorphu,  Spiximtirjihal  Uoiidaiii,  Ann.  Soc. 
I'^nt.  (Ic  Frame.     Kiiropc. 

1851. 
58. — Chryaochlamis  H'lirnsochlumiii.  ('Iiriifoilumiix]  (Roudaiii)  Walker,  Iim.  Brit., 
i,  '279.     Kiiri)|)<'. 

1852. 
35. — TijzeiihaitnUt  \_:ia'\  (loiski.  Aiiiial.  ad  I-^ut.  prov.  Ho.^sici,  170.     Europe. 

1855. 
84. —  ToTomrnis  Macfinart,  Di]»t.  cxot  ,  .'i'  .Siippl.,  112.     North  America. 

1856. 
29.-  XiilirnledHii  Jfoiidaiii.  Dipt.  Ital.  I'rodr.,  i,  44.    Kuropc. 
15. — Spliixd'a  [•'»'/) /i (>«•((,  Spliiina,  Spliizaa,  Sphjixna']  Koiidaiii,  ihid.,  4fl.    Enrope. 
59. — Caliprobola  [''ulliproliola]  Koiidaiii,  ihid.,  47.     l^iiroiie. 
3.  —  Lnsiophtinis  IJoiidaiii,  ll)id.,  ."il.    Kiimpc. 
19. — llcriiiii'hi  [  lliriiiiiiiii]  K'oiidaiii,  i I dd.,  .">.!.    l^iiropc. 
XO.—MilothrojKi  [Mnatfoim,  Mii'ialropa]  Ifoiidani,  ibid.     Europe. 
3. — Ephtiopliv  [((••<  I  Walker,  liis.  Samidcrs,  ','4','.    North  America. 
'l2.—  i'hnxtis\\'\i\kvY,  ibid., -jn.    liiazil. 

82. — Aiimtliia  Walk.'r  (iiou  Lam.,  iicc  lJoiix,iif'c  Diip.),  ibid.,  '22'3.   Brazil. 
60.— Citibccna  Walker,  ibid. 
61.--Deineches  Walker,  ibid.,  'i'i?. 
62. — Baryterocera  Walker,  iitid. 

1857. 
63. — Lejops  ILioi)'^  \  liondaiii,  Dipt.  llal.  I'rodr.,  ii,lJ;!,  note.    Europe. 
42.—Xiilot(rja  Kotidaui,  ibid.,  yd.     Europe. 


f| 


t 


280 


BL'LLETIX 


yi,     L'NITED    STATES    NATIONAL    MUSEUM. 


I 


t 


m 
w 


'  y 


'     II' 


M 


r- 
.'(,.! 


f  I 


\  : 


G4.  -  Mesembiius  Rondaiii,  il)i(l  ,;")(>,  note.     Euiojio. 
10.— l'il)h)'lla  IJomUini,  ibid..  I-Tj.     I'.nroiic. 
6S.— Simoides  En>w,  Dijtt.  SiMafiikas.     Alrica. 

7. — ('aiii]>iiiieitra  [('(impiii<'iir('.  ~  ani]>li>)i( iira],  Uoiulaui,  ibid. 
66. — Rlioga  VValktT,  Trans.  Eiit.  Soc.  IahkI. 
6/. — Lycastiis  \V:ili<i'r,  ibid. 
16. — l-^rintaliinia  Koiidani,  iltid..  10.     Eni'ofio. 
Id. — KriKiuUiuiija  [  i/i,7i((]  lioiidaiii,  il)id.,  10,     Europe. 
Mclaiionantcr  Ivoiidaiii,  ibi<l.,  KiO.     Europe. 
Lejogaxlir  Knndani,  ibid.,  ICli.     Euroiio. 
Lcjota  \_Liota'\  Kouduni,  ibid. 

1858. 
37.  —  DaHijnufHi  Ejjjjer,  Vcrli.  zool.-bot.  (icsellscli. 

1859. 
7. — Crijplineura  [f  ryploiieiira'\  Hiyot,  Ki'V.  ot  Mag.  Zoo!.,  307.     North  America, 
€7. — Liicastrirhiiiivha,  Hij^ot,  ibiil.,  ;J07.     .Soutli  America. 
68.— Cyphipelta  Bigot,  ibid..  .'?07 ;  Kiider,  NVicu.  cut.  Zeif.,  i,  01.    Australia. 

3860. 
69. -  Melanostoma  Scliiiier,  Wicr..  cut.  Moiiatsclir.,  iv,  213.     Europe. 
70.— Pyropheena  Sdiimr.  il>i(l.,  <!i:?.     Eiirit[)o. 
71. — Eriozona  ScbiiHT,  ibid,  '2l\.     Euroito. 
72.— Leucozona  Si'liiner,  iiM.     Eiirojic 
73. — Arctophila  Sidiiiur,  ibid.,  '215.     Europe. 
74.— Xauthogramma  .'^ciiinir,  ibid..  2U).     Eiirnpo. 

1863. 
75. — Pterallastes  ll'te>r!nxt<'^'\  I-ocw,  Cciitiir.,  iv,  f'O.     North  America. 

1864. 
105. — /.«7)(V?())»i/io  lioew  (mm  IJigot,  1>47),  Ci-iitiir.,  v,  IV-*.     North  America. 
16.— .hoiia  Walker  (uoii  Still,  l.-;(i4),  I'roe.  Liiiii.  lOiit.  Soe.,  vii,  '211.     Mysol. 
23. — Plants  Kondaui,  Arehiv.  Zool.  anal,  c  Ei.siol.,  iii,  II.     Europe, 

1865. 
84. — Mcsofiromma  Loew,  Ccntur.,  vi,  17.     Xdrtli  Ameri   a. 
76. — Pteroptila  IPterojihild']  Loew,  ibid.,  ."■>.     North  America. 
19.— Ciiemodoii  Ej;ger,  Verli.  zool.-ltot.  (iescllscli..  xv,  r>7;5.     Europe. 
n.—i:r\ophora  I'liillipi,  W-rh.  zool.-bot.  (Jeseliscli.,  xv,  7:i5.     South  America. 
78. — Sterphus  I'liillipi,  ibid.,  7;!7.     South  America. 
37.— Stilbosoma  riiilliiii,  ibid  ,7;{(>.     Europe. 
7J. — Macrometopia  PliiUipi,  iliid.,  740.     South  Ameri;'a. 
19. —  /Vhi'ioh  [/V»Mi'((m]  I'liillipi,  il)id.,  741.     South  Auierica. 

I'ia  Pliillii  i,  ibid.,  74'i.     South  Anuirica. 
80. — Pahnnbia  lioiidani,  Atti  Soe.  Ital.  He.  nat.,  viii,  1'29. 
81.— Aspeytia  \^Ani)ciUu'\  Walker,  I'roc.  Ein.  Soe,  viii. 

186D. 
82.— Salpingogaster  Schiner,  Noviua  lOxped.,  344.     South  America. 
83. — Exoclieila  j /■xoc/k/k]  Uondaiii,  Atti  d.  Soe.  Ital.  se.  uat.,  xi. 

Glaurotricha  {Uaiirulricha)  TlioniMon,  Eiigeu.  Ivcsa.    Soutli  America. 

1869. 
12. — Mcaophila  Walker,  List,  eli?.,  iv,  ll.')7.     North  America. 

1872. 
84. — Mesograpta  Loow,  Centir'.,  vol.  ii. '210.     Noitli  America. 

1876. 
£5.— AUograpta  Osten  Saekeii,  Ihill.  JhilV.  Soe.  Nat.  Se.,  iii,  4'.).     North  America. 
86.— Teuchocneriia  Osteu  Sacken,  ibid.,  5iS.     North  America. 

1877. 
87. — Catabomba  Osteu  Saclvcu,  West.  Dipt.,  iW.'i.     North  America. 
88.— Eupeodes  Cstcu  Sackcu,  ibid.,  ;(-2H.     North  America. 


SYNOPSIS    OF    NORTH    A.MKKICAN    SYIUMIIU/K. 


287 


North  America, 
Enrope. 


1878. 
89— Crioproia  Ostcii  Sackcn.  Cat.  Dijit.,  l:!('i.     North  America. 
39. — .Icruchonloiiodi H  15ij;ot,  Hull.  Soc.  Kiit.  Fr.,  No.  V.\,  V.M.     S.  Auicricii. 

1879. 
90.— Merapioidus  [ts]  Bigot,  l?ull.  Soc.  Fiit.  Fr.,  No.ti,  (14.   NortJi  Aim'rica. 

1881. 
91. — Soleiiaspis  Ostcii  SiukiMi,  Ann.  d.  Mns.  liv.d.  stor.  iiat.     Gfuou,  IW.     Now 
Guinea. 

1882. 
37. — lirachiimyia  Willi.stoii,  Canadian  l',ntonioh)gist,  xiv,  77.     North  America. 
31. — lladromijia  \Villinton,  ihid..  If*.     North  Anifrica. 
98. — Eugeniamyia  ll^'ngi'iiioitiiiiul  Williston,  ihid.,  80. 
3. — Ani'jivloHjifjthiis  ni^ot,  liull.  Soc.  Knt.  Fr.,  No.  (5,78. 
37. —  luirhinomalhilu  Hinot,  ihid.,  7"*.     Mfxico. 
92. — Simosyrpbus  nijjot,  ilild.,  7[). 

3. — fschjiroHjiriihiiH  ni<!;ot.  ihid.,  7S.     Ktiropi'. 
93,— Ptilostylomyia  ISif-ot,  ii)id..  No.  I'i.     Sjiain. 

2. — Atvmuovvra  [5i^ot,  ihid.     .*<()utli  America. 
94.  — Doliosyrphus  IDotiioxiirphiiH]  Hinot,  ihid..  No.  13.    Central  America. 
95.— Tisr'demyia  ITiiiridimiiia,  Titiridiamiiia'i  J$it;ot.  ihid.     Java. 
96.~Priouoiomyia  ll'riuiioloniji.i]  Hi^^ot,  ihid.     Senegal. 
97.— Eumerosyrplnxs  Hi;;ot,  ihid.,  No.  14.     India. 
10. — Asemos!irj)liiin  Hif;ot,  ildd.      .Mexico. 
89. — noinah'oxjir^iliitH  Higot,  ihid.     Mexico. 
99.— Ortholophus  Ui^or,  ihid.     Cliili. 
100. — Kirimyia  Higot,  ihid.,  N'r).  |.">.     .lajian. 
101. — Eudoiasimyia  Bi^ot.  ihid.     India. 

1883-1886. 

10. — Enrlnmyia  Bigol,  Bull.  Soc.  F.ut.  Fr  ,  No. 

26. — CartoHijr^ihiiH  Bij^ot,  Aunalcs  8oc.  Knt.  I'r 

27. — /w(c<T«^«Hi//(a  Williston,  188),  Wien.  Knt. 

102. — Naiisigaster  Williston,  l--'.').  Trans.  Aniei 

103. — Chalcomyia  WillistcMi,  Ihill.  Brook!.  Fiit.  .'>oc.,  vii,  1:515.    North  America. 
104. — Triodoiita  WilliHtou,  ihid.,  is-'ti,  p.  VM.     North  America. 
105. — Lepromyia  Williston,  ante,  \>.  \\\.     North  America. 
106.-  Cynorhiiia  Williston,  ante,  p.  -JOD.     North  America,  Europe. 
107.— Neoascia  Willi.stoii,  ante,  p.  111. 


;?.     Europe. 
.,  'i'M).     Europe. 
Zeit..  iv.     Nortli  America. 
Ent.  Soc.     North  America. 


DKFIXITION  OF  TERMS. 


iii:.vi). 


Holoptic. — Contiguity  of  tile  eyes  in  tlie  i-.iah',  lietween  tlic  vortex  anil  tho  antennas. 

Dk'.lto})1ic. — Separation  ofthi-  eyes  liy  the  IVont  in  all  I'eniale.s,  and  8onie  nuiles  as  iti 
f'halcomjiia,  Ifclophilns,  TrUidoiilu,  Crioriiiini  sp.,  etc. 

I' rtex. — Tlie  n]»i)erniost  lionler  of  the  head  hetweiMi  tlie  eyes. 

Ocelli. — Three  small,  siinph'  eyes  near  the  xcriex  oti  the  u])per  jiart  of  th(>  front. 

Front. — Tho  space  included  Itelween  the  eyes,  tlie  vertex,  and  tlie  antenna'. 

Fertkal  triangli: — In  the  male  the  small  triani;le  ni)i)n  w  iiich  tli((  ocelli  aie  situated, 
jimited  hehiud  hy  the  verti'X,  in  front  hy  the  eyes. 

L'rontal  triangle— \\\  \\w  nuile  the  triangular  space  hetween  the  eyes  helow.  limited 
hy  a  lino  drawn  through  the  hase  of  tho  antennio. 

Frontal  or  antmnal  procexs. — The  more  or  less  pronounced  projection  upon  which  tho 
antennio  are  inserted. 


i  ■,: 


||. 


I  If  I'.'. 


2SS        ncM.ETix  :ii,  united  statf.8  national  mcskum. 


rt 


>  % 

i    ;, 


III" 


li     i! 


''    :..!' 


'I 


Jiilinnii. — Iiiscrti'il  cliisc  totjctlii'i'  in  tlic  line  liclwccii  tlif  lV')nt  atul  lace,  f()iii])OviMl 
ipf  I lirci-  joints,  llii'  third  of  wliicli  hears  th<!: 

.hinld. — A  sh-niicr  hristlc  sitnnlcd  n])o?i  tlin  ujiiicr  honh'r  of  thi'  tliird  Joint,  miiro. 
M'0|»ically  .jointed  ii'-ar  its  hasc  ;  or: 

Slt/li\ — A  thickened  jointed  arista  (in  Cir'ni  and  I'clccocfra)  sitiiaied  al  nr  near  the 
;i|»  of  tin-  tliird  Joint. 

Facr. — The  sjiaee  between  tlie  base  of  the  anteiMne  and  the  oral  mar^jin,  limited  on 
the  si(h'S  by  I  lie  eyes  and  eiieeks. 

/■'((('('(//  liihvrrlv. — A  more  or  U'ss  jironouneed  median  eonvexily  below  tlie  nii(Ulle  ni 
the  face. 

Chillis. — The  s|>ace  between  the  h)wei'  honh'rs  of  the  eyes  and  the  oral  niiiinin. 
mer^inj;'  into  the  face  in  front  and  limited  l)y  the  occipital  margin  hidiind. 

<)ccii)itt. — Tlw.  wliohi  posterior  snrfaec  of  th(f  head. 

Orhiln. — A  narrow  indelinite  s])ace  immediately  bordering  the  eyes,  and  called  ver- 
lieal.  or  superior;  frontal  and  facial,  or  anterior;  the  orbits  of  the  che(d<,  or  inferior: 
occipital,  or  posterior. 

llp'tHliniiH. — The  oral  inart;iii  of  the  face,  and  the  rejjion  immediatoly  adjacent. 

Oral  or  biirral  cavity. — The  month. 

I'rohoHcis. — Mouth  or;;ans,  near  tlu'  base  of  whieli  are  inserted  the  small,  one- 
Jointed  palpi,  and  terminal  in;;'  in  two  lle.>-hy  lijis,  the  lahcllw. 

Mention. — Th(^  posterior  oral  inarjiin. 

TIIOHAX. 

Dormim. — The  whole  upper  surface,  limited  by  tlie  dorso-pleural  sutures  laterally, 
the  .scutellum  i)ostirriorly,  and  the  neck  anteriorly. 

Pltiirw. — The  later.-il  surfaces  of  the  thorax. 

I'i'cliiH. — Tlu^  inferior  surfact*  of  the  thorax  between  the  legs. 

Scntclliiiii. —  A  sub-hemispherical  body  behind,  cut  off  by  an  impressed  line  from  the 
dorsum  of  the  thorax. 

Mclanotinn. — Tlie  posterior  surface  of  the  thorax  between  the  sciitelluiu  and  the 
liase  of  the  alnlouu'ii. 

Humeri  or  xhouldi'rx. — The  anterior  superior  aiiKh's  of  the  thorax. 

I'oni-alar  cnllonilics. — K'onuded  processes  on  the  posterior  lateral  iuar<rins  of  tie- 
dorsum. 

Traiifir<r.-c  Kiitiirv. — A  transverse  groove  in  front  of  the  root  of  the  winjjs,  obsolete  in 
th(^  middle  of  tln^  dorsum. 

Dorm)  pleural  yittiirc. — The  lati'ral  suture,  Itetween  the  dorsum  and  th(>  ])leura',  ex- 
tendiii'.;'  from  the  humeri  throunh  the  )>ase  of  th<!  win<;s. 

Tr<iiil(r. — Two  membranous  scales  situated  lie1iin<I  the  immediate  base  of  the  winu, 
tli(^  up]iei'  overlai>piii;r  the  under. 

lT<iltt'ret  nv  balaiK'crx. — An  organ  with  a  slender  stem  teri'iiiiating  in  a  rounde(t 
knob,  insi>rt('d  in  the  metathorax  Just  in  fi'ont  of  the  lateral  base  of  the  abdomen. 

ARDOMKN. 

Iiicisiiris. — The  sutures  se|)ar.itiii,u;  the  segments. 

Fciitir. — The  whole  nnd(M- suri'ace  of  th((  abdomen. 

l[i/jK>liil!liiiiii. — The  male  sexual  organs  and  terminal  segments  of  alxlonieu. 

Oridiicl  or  nriposi^lDr. — The  terminal  segments  of  the  female  abdomen. 

i,i:<is. 

C'o.rcr. — Hasal  segment  atta<'hi'd  to  the  thorax,  terminating  in  a  small  ring-like  seg- 
ment, the  Irot'hanlrr.  Tlie  next  most  elongate  jiortiim  is  the  femur ;  then  follows  the 
lihia ;  the  joint  between  them  is  called  the  kurr.  and  expresses  the  immediate  contig- 
uous prirtions  of  the  fiMiinr  and  tibia. 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


289 


Feet. — Composed  of  the  five  joints  of  the  tariti,  the  basal  one  of  Trhich  is  called  the 
metatarsus,  the  distal  one  terminating  in  two  clatci  or  ungues,  on  the  under  side  of  each 
of  which  is  a  Hmall  uiembranons  appendage,  the  pulvillut. 

WINGS. 

Borders  or  margins,  anterior,  exterior,  and  ^^osterior  of  the  wing,  directed  transversely. 

Alultt. — The  lobe  or  fla])  of  the  wing,  without  veins,  on  the  basal  posterior  part. 

Venation. — Costal  vein,  the  one  bordering  the  anterior  margin  of  the  wing;  auxiliary, 
nearly  parallel  with  the  eosta  from  the  base,  and  terminating  in  that  vein  near  its 
middle:  connected  towards  its  base  with  the  costa  by  a  transverse  cross  vein,  the 
humeral  cross-vein ;  the  first  longitudinal  vein  arises  from  the  auxiliary-vein  in  the 
vicinity  of  the  humeral  cross-vein,  follows  the  auxiliary  subparallel,  and  is  inserted 
in  the  costa;  the  second  longitudinal  vein  arises  from  the  first  longitudinal  a  little 
beyond  the  humeral  cross-vein,  follows  the  former,  and  is  inserted  in  tlie  eosta,  or  some- 
times in  the  first  vein  before  its  tip ;  the  third  longitudinal  arises  by  a  fork  from  the 
second  longitudinal,  a  little  distance  before  the  termination  of  the  auxiliary,  and  is 
inserted  in  the  costa  at  its  tip ;  in  its  course  it  gives  off  a  short  branch,  the  anterior 
or  small  cross-vein,  to  connect  with  the  fourth  longitudinal  vein;  fourth  longitriinal 
vein  arises  from  the  second  main  vein-stem  opposite  the  humeral  cruss-voin  and 
terminates  in  the  third  longitudinal  a  short  distance  before  its  tip;  it  gives  ofi',  first 
the  anterior  basal  cross-vein  behind,  opposite  the  origin  of  the  third  vein,  second  the 
anterior  cross-vein  to  connect  with  the  third  longitudinal,  and,  just  before  it  bends 
forward  to  connect  with  the  third  vein,  it  receives  the  posterior  cross-vein;  the  fifth 
longitudinal  vein  arises  near  the  origin  of  the  fourth  and  terminates  a  little  before  the 
jiosterior  border  of  the  wing;  opposite  the  anterior  basal  cross-vein  it  gives  oft"  the 
posterior  basal  cross-vein,  is  then  directed  angularly  forwards  to  join  the  anterior  ba.sal 
fToss-vein,  then  follows  parallel  to  its  first  section  to  connect  with  the  posterior  cross- 
vein  where  it  terminates,  or  is  sometimes  extended  a  short  distance  as  a  Mtnmp ;  the 
sixth  longitudinal  rein  arises  near  the  origin  of  the  iiftli  and  lerminatcs  in  or  near  the 
]Kisteri<>r  border  of  the  winj;,  a  litth;  before  llic  middle  ;  jii«t  before^  its  end  it  receives 
tht  ponUrior  hanal  cronn-reiii. 


aurwr. 


Zt'loRf.   ''■'«";■  '^"'•:''       ^.' 


"Pos/c-v,:         I    r~;' 

/lilV.Clfil-v    b.l.v,    3. tone  V. 

NViiii;  of  I\ihinliK. 

The  contal  cell  is  included  lictweeii  the  aiixi'.iiuy  win  and  tlie  costa.  The  subcostal 
cell  is  l)(iunrlc(l  in  front  by  the  anxiliary  vein  and  tin-  costa,  behind  by  the  first  loiij^i- 
Midinal.  Tlie  marginal  cell  is  inclosed  by  the  first  iind  second  lon<;'itndinal  veins, 
wholly  when  the  cell  is  closed,  in  part  in  front  by  the  eosta  when  the  cell  is<)))cii. 
The  siihmarghiul  cell  lies  between  the  second  iind  third  veins,  tonehiii<f  the  costa 
•  ■xteriorly  for  a  .short  distance,  and  the  tip  of  the  tirst  loiijiitudin.-i!  vein  when  the, 
iiiiii'<;inal  cell  is  closed.  The  /(r«^  hasal  cell  is  bonixlcd  in  Ciont  by  the  basal  sectioiiH 
"f  the  (irst,  second,  and  third  loiigitnfiin;il  veins,  exteriorly  by  (he  iinterior  cross-vein, 
posteriorly  by  th«*  tburth  longitudinal  vein.  The  second  basal  cell  is  bounded  in  iV'int 
liy  the  fourth  longitudinal  vein,  exteriorly  b*  the  anterior  bnsiil  cidss-vein  iin<i  the 
second  section  of  the  lil'th  longitudinal  vein,  i)osteriorly  by  the  liith  longitiidin:il. 
The  thinl  banal,  or  anal,  cell  is  bounded  in  I'ront  liy  the  fifth  longitudinal  vein,  ex- 


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290 


BULLETIN  31,  UNITED  STATES  NATIONAL  MUSEUM. 


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teriorly  by  the  posterior  basal  cross- vein,  posteriorly  by  the  sixth  loDKitudiuul.  Th-: 
first  posterior  coll  is  bounded  iu  front  by  the  third  longitudinal,  behind  and  exteriorly 
by  the  ultimate  and  penultimate  sections  of  the  fourth  vein,  internally  by  the 
anterior  cross-vein.  The  discal  cell  is  inclosed  in  front  by  the  fourth  longitudinal, 
behind  by  the  fifth  longitudinal,  exteriorly  by  the  jtosterior  cross-vein,  internally  by 
the  anterior  basal  cross-vein.  The  third  posterior  cell  lies  between  the  fifth  longitu- 
dinal and  the  posterior  basal  cross-vein. 

Stigma. — A  colored  spot  near  the  tip  of  auilliary  vein. 

VE8TITURE. 

File. — This  term  properly  should  be  restricted  to  thick,  tine,  short,  and  erect  hair, 
as  in  the  pile  of  veivet ;  in  reality,  however,  the  word  is  incapable  of  defini^a  limita- 
tion, and  is  here  generally  employed,  the  word  hair  being  only  used  to  express  very 
sparse  or  coarse  pile,  as  iu  the  hair  of  the  face  iu  Chilosia,  or  the  sparse  vestiture  of 
the  eyes  in  Syrphus, 

MacrochcBtce,  or  bristles,  are  only  present  in  Chilosia,  spp.,  Brachyopa,  spp.,  Eugeni- 
omjiia,  Folucella,  spp.,  and  Chrysoohlamys,  on  the  thorax,  and  in  a  few  others  on  the 
legs ;  never  on  the  head. 

Pollen,  or  dust,  is  that  which  conceals  or  obscures  the  shining  or  opaque  ground 
color  to  a  greater  or  lesser  degree,  and  is  more  or  less  easily  removed  by  moisture  or 
rubbing. 

Tomentum  primarily  indicates  short,  flattened,  appressed  hairs,  and  is  only  found  iu 
Lepromyia,  Myiolepta,  «2>.,tiiough  in  some  other  cases  the  term  is  used  to  designate 
coarse  pollen,  as  in  Temnostoma. 

Pubescence  is  here  used  only  to  indicate  very  short,  nearly  microscopical  hairs,  on 
the  arista,  wings,  etc. 


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APPENDIX. 


MIXOGASTER. 


Mixogaater  Macquart,  Dipt.  Exot.,  ii,  'i,  14,  1842. 

This  genus  will  be  recognized  without  difficulty  from  what  has  been 

given  in  the  introduction.    The  known  species  resemble  Ceria  in  shape, 

but  with  the  head  of  Microdon.  Type  of  genus,  M.  conopsoides  Macquart, 

South  America.    Thomson  has  described  a  species  from  Australia. 

Mizogaster  mezioanus  Macquart,  Dipt.  Exot.,  ler  Suppl.,  123,  pi.  x,  fig.  15. — 
Mexico. 

PIPIZA. 

Pipiza  crasaipes. 

Pipiza  crassipca  Bigot,  Ann.  Soc.  Ent.  Fr.,  1884,  557. 

Habiiat. — North  America  (Bigot). 

9 .  Length,  7°"».  Nigra,  vix  nitida.  Antennarum  segmento  tertio 
chetoque  fulvis;  facie  vinereo  pared  tomentosd;  calyptris  albis,  halteribus 
testaceis;  alis  pallidissime  fuscanis,  basi  hyalinis,  maeuld  stigmaticali 
testaced  ;  pedibus  posticis  parum  incrassatis. 

D'un  noir  peu  luisant,  presque  glabre.  Antennes  3e  segment  et 
cbfete  fauves;  face  avec  un  fin  duvet  grisatre,  clair  sem^;  uu  peu  de 
duvet  blanc  sur  les  flancs  ainsi  que  sur  les  cuisses ;  cuillerons  blancs, 
balanciers  testac^s;  ailes  un  peu  roussatrcs,  hyalines  \  la  base,  macule 
stigmatique  rou8sS,tre;  genoux  fauves,  pieds  post*  ieurs  l^g^rement 
epaissis,  surtout  le  m^tatarse. — 1  specim.,  — ,  Bigot,  I.  c. 

Pipiza  puelchella,  ante,  p.  27. 

It  is  not  improbable  that  Chryaogaster  Apisaon  Walker,  List,  etc.,  iii, 
572  (New  York),  is  the  same  as  this.  At  least  the  hairy  eyes  and  elon- 
gate antennae  indicate  that  it  is  a  Pipiza  (Pipizella)  or  Psilota. 

PSiLoTA. 
Psilot'a  buccata. 

An  examination  of  a  number  of  specimens  in  the  National  Museum 
enables  me  to  give  a  more  complete  description  of  this  species. 

3  .  Length,  8""™.  Metallic  black.  Antennae  black;  third  joint  elon- 
gate, about  four  times  as  long  as  wide,  reaching  nearly  to  the  epistoma. 
Epistoma  small,  not  much  projecting.  Face  white  pilose.  Eyes  long, 
luteous  yellow  pilose.  Dorsum  of  thorax  rather  thickly  reddish  yellow- 
ish pilose.  Abdomen  elongate  oval,  shining  black  with  a  light  brassy 
reflection;  pile  reddish  yellowish,  abundant, erect.    Legs  black.    Base 

291 


292 


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of  tibiae  and  tarsi  Inteous.  Wiugs  brownish  on  outor  part;  last  two 
sections  of  fourth  vein  nearly  equal,  short  appendiculate  at  the  angle, 
first  posterior  cell  short  petiolate. 

9 .  Face  nearly  vertical  and  straight  to  just  above  the  epistouaa, 
which  is  moderately  produced.  Pile  of  front  darker.  Dorsum  of 
thorax  with  rather  thin  lutescent  i)ile.  Abdomen  broadly  oval,  tlie 
fourth  segment  long,  the  fifth  nearly  concealed ;  in  color,  shining  black, 
with  a  bronze  reflection;  pile  lutescent. 

Six  specimens,  Texas.  Two  other  specimens  from  Georgin  are  a 
little  smaller,  the  third  joint  of  the  antennsB  is  a  little  shorter,  and  the 
abdomen  is  less  metallic.  The  male  has  the  face  below  the  antennae 
more  concave,  and  the  pile  of  the  dorsum  of  the  thorax  more  blackisli 
across  the  middle.     Very  likely  there  are  two  species  here. 

CHIIiOSIA. 

ChiloBla  hoodlensis. 

Cartooyrphua  luwdianua  Bigot,  Am.  8oc.  Ent.  Fr.,  1884,  552. 

Habitat. — Oregon  (Bigot). 

9  .  Length,  9™™.  Nigra,  sparse  fusco  etcinereo  tonuntosa.  Antenvia 
fulvis,  vheto  fusco,  hrevissimd  tomentoso  ;  facie  nigra  nitido,  utrinque  funco 
tomentiisa, /route  nigra  viUosa;  ocnlis  riHosiN ;  tharace  KvuleUoqm-  nitidis, 
fvsca  rillosnlis ;  caJyptris  fere  alhitlis,  haiterihus  apici-  a(staneix  :  ahdu- 
mine  nigto  opaeo,  ntrinque  einereo  villosa,  segmentis  1,  4  ^^  .")/«  nitidis.  L*, 
ef  '.iis  utrinqne,  hasi,  late  nitidis;  pedihus  nigris,  geuicniis  tibiarmmpu- 
basi,  fulvis  ;  alis  paUide  cinereis,  basimactddquc  stigmaticali  infiiscatis— 
G.  Clieilosia,  propr.  <lict. 

Antennes  fauves,  ch6te  brun,  tn\s  niMlocrtMuent  tonuMitenx ;  face  <l"un 
noir  luisant  avec  (pielques  polls  bruns  sur  les  cotos ;  front  a  ]M)ils  noirs; 
yeux  veins;  tiiorax  noir  luisant.  cliiirsenu*  <le  i)oils  biuiis:  ciiilleioiis 
bliuicliatres,  halaiieiers  a  niassue  brune;  abdomen  (I'lui  noir  iiiaf.  iiiuni 
d'assez  longs  jtoils  jiris  sur  les  cotes,  l*^  4'',  et  5*-  segments  liiisants,  i"" 
et  iJ*"  de  clia«iue  c6t«'',  x\uv.  macule  trigonale  luisante;  pieds  noi's,  quel 
ques  |)oils  elaii-  semes  gris,  genoux,  base  des  tibias  etroitement  fauves; 
ailes  d'un  gris  tres  elair,  jtlus  foncees  vers  le  bonl  externe,  base,  macule 
stigniatique,  d'nn  roux  ])ale. — 1  special.,  Mount  Hood.  —  Uigot,  /.  c. 

lidentif^va  male  spectitnen  from  Mount  Hood  as  this.  The  pile  of  the 
head  and  dorsum  of  the  thorax  is  black.  The  fourth  abdominal  seg- 
ment is  shining  metallic,  like  the  anterior  triangular  spots  on  the  sec- 
ond and  third  segments ;  the  wings  are  very  distinctly  brownish  iu 
front;  and  I  cannot  distinguish  any  pubescence  on  the  arista. 

Chilosia  laevis. 

VartimiirpliiiH  lnviH  Bifjot,  Aim.  Soc.  Eut.  Fr.,  1884,  .'>.'»:{. 

Habitat. — Washington  Territ(U'y  (Bigot). 


9 .     Length,  7' 


Tota  nigra,  nitida,  nuda.     Olieto,  facie  oculisqnc 


nudis;  calyptris  albis,  haltcribus  tistaceis ;  alis  pallidd  tcstaceis. 


SYNOPSIS    OF  NORTH    AMERICAN    SYRPHIDJE. 


293 


Euti^remeut  (Vuii  iioir  luisaut,  bii^vement  clairserad  d'uu  duvet 
griufttre;  ch6te,  face,  yeux,  uus;  cuilleroDH  blaucs,  balanciers  testacies; 
ailes  un  peu  jauug-treK;  quelques  macrouh^tes  noirs  an  bord  de  I't'cus- 
son. — 1  spocim.  —  Bigot,  I.  c. 

Chilosia  tristis. 

I  am  wrong  in  uniting  the  male  and  female  8pecimens  described  under 
C.  pallipen.  Notwithstanding  tha  fact  that  specimens  were  collecte«l 
together,  almost  indeed  at  the  same  moment,  they  belong,  I  believe,  to 
different  species.  My  reasons  I  find  in  the  shape  of  the  first  posterior 
cell.  In  C.  tristis  (the  males)  it  is  broader,  and  the  last  section  of  the 
fourth  vein  comparatively  longer  than  in  C.  pallipes  (the  females).  The 
female  of  C.  tristis,  according  to  Loew,  differs  also,  apparently,  in  not 
having  the  light-colored  humeri. 

SYRPHUS. 

Syrphus  fumipennis. 

Syrphus  fumipennis  ThoniHon,  EugenicH  resa,  499. 

Habitat. — California  (Thomson). 

S  .  Length,  10""".  Eyes  bare,  frontal  triangle  fuscous  pilose,  yellow- 
ish; face  slightly  concave  below  the  antennae,  yellowish-white;  cheeks 
bronze  fuscous,  subopaque;  the  lateral  and  front  oral  margin  blackish, 
shining.  Antennae  yellow.  Thorax  bronze  fuscous,  the  sides  more 
yellowish;  pile  pallid;  scutellum  pallid  testaceous,  with  fuscous  and 
pallid  pile  intermixed.  Wings  somewhat  smoky.  Abdomen  oval,  sub- 
depressed;  short,  pallid  pubescent;  second  segment  deep  bhack,  long 
yellow  pilose  on  the  sides,  \\ith  a  yellow,  triangularly  oval  spot  on  each 
side,  the  sides  anteriorly  confluent  with  the  margin;  third  and  fourth 
segments  deep  black,  with  a  broad  yellow  posteriorly  sinuate  fascia; 
hind  margin  of  the  fourth  and  fifth  segments  testaceous;  hypopygium 
shining  black.     Legs  yellow,  base  of  the  femora  black  fuscous. 

The  above  is  an  abstract  of  Thomson's  very  long  and  redundant  Latin 
description.  He  says  of  the  species,  that  is  is  very  similar  to  S.  corolla\ 
but  differs  in  the  smokj*  wings  and  abdominal  bands.  I  cannot  apply 
the  description  to  any  species  which  I  know,  though  I  think  it  comes 
nearest  to  Americanvs.  The  legs  are  said  to  be  black  only  at  the  base 
of  the  femora,  and  the  bands  of  the  third  and  fouvth  abdominal  seg- 
ments are  not  stated  to  reach  the  margin. 

Syrphus  ochrostoma. 

SyrphuB  ochrostoma  Zetterstodt,  Dipt.  Scaiid.,  viii,  3133;  Sell iner,  Fauna  Austr., 
i,  310;  V.  (I.  Wulp,  Tijdscbr.  v.  Ent.,  xxv,  134. 

Habitat. — Europe,  Canada  (v.  d.  Wulp). 

S  ,9 .  Length,  12™™.  Is  like  S.  ribesii,  but  the  scutellum  is  yellow 
pilose,  and  the  femora  are  wholly  yellow. 


r*- 


294 


BULLETIN   31,    UNITED   STATES   NATIONAL   MUSEUM. 


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Syrphus  tarsatus. 

SyrphitH  tormlm  ZotttTHtcdt,  Ins.  Lnpp.,  ()<»1,  'Z\  Dipt.  Sonnd.,  TM,  X\',  Staegcr, 
Gro»'nl.  Aiitl.,  :W)0,  5>:. 

Habitat. — Europe,  Greenland. 

Leiifrtli,  8"""  to  9""".  Shininjj  metallic,  blackish-green.  Eyes  pilose. 
Face  yellow,  oral  margin  bhusk.  Aiiteunaj  blackish.  Abdomen  with 
tiiree  straight,  interrupted  bands.  Legs  reddish -yellow;  base  of  fern  or  n 
and  tarsi  black  j  hind  tibiae  with  a  brown  or  blackish  ring.  Scutellum 
yellow. 

Syrphus  dimidiatus. 

Syrphus  dimidiatus  Macqnart,  Hist.  Nat.  Dipt.,  i,  537. 

Eahitat. — Georgia  (Macq.). 

Length,  lO.r*"'"'.  Black,  sides  of  the  face  whitish.  Third  joint  of 
antennfe  reddish  below.  First  band  of  abdomen  interrupted,  the  others 
broad,  <'ntire.  Legs  yellow;  hind  i)air  and  base  of  front  femora  black. 
Wings  brown  on  the  anterior  i)art. — Macquart. 

This  description  is  not  sufficient  to  admit  of  ideutification. 

MESOGRAPTA. 

Mesograpta  marginata. 
The  following  synonym  was  omitted  under  this  species : 
SyrphuH  limbiventrhs  Thomson,  Eugenies  resa,  485,  83. — California. 

Mesograpta  coaiescena. 

SyrplntH  coalencenH  Walker,  Dipt.  SauiulerH,  UW. — North  America. 

Mesograpta  corbis. 

Syrphus  corbis  Walker,  Dipt.  Saunders,  237. — North  America. 

"Both  are  Mesograpta;,  each  represented  by  a  single  specimen  in  the 
British  Museum,  I  find  in  my  notes  that  both  produced  on  me  the  im- 
pression of  M.  Boscii,  although  the  description  of  S.  coalesccns  reads 
more  like  that  of  M.planiventris  Loew;  the  female  described  by  Walker 
is  probably  a  different  species." — Osteu  Sacken,  Cat.  Dipt.,  125,  note. 

COPESTYTATM. 

Macquart's  figure  of  C.  flaviventris  shows  as  much  resemblance  to  C. 
limbipennia  as  it  does  to  G.  marginatum,  but  the  descriptions  will  not 
apply  to  the  former  at  all,  especially  as  regards  the  structure  of  the 
antennffi. 


'i, 


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SYNOPSIS   OF   NORTH   AMERICAN   SYRPHID^. 


295 


.  HEL.OPHIL<U8. 

TABLE  OF  SPECIES. 

1. — B^ace  jutting  forward  into  a  cono 2 

Face  not  conically  produced  forwards 3 

2. — Face  obtusely  conic hamatus 

Face  sliaridy  conical couoBtor:js 

3.— Sixth  longitudiniil  vein  distinctly  sinuous 4 

Sixth  vein  nearly  straight  or  only  gently  curved 7 

4. — Dark  colored  species 5 

Light  colored  species;  stripes  of  thorax  distinct 6 

5. — Southwestern  sjiecies mexicanus 

e  glacialis 

Northern  species <  grcenlandicuB 

(  borealis 

6. — Front  of  female  black  pilose ;  front  of  male  narrow  above similis 

Front  of  fenuile  black  pilose  only  nenr  the  ocelli ;  front  of  male  broiid  .  latifroiis 

7. — Auteniiu'  reddish  yellow 11 

Antenna'  dark 8 

8. — Third  joint  of  antenna?  pitchy  or  more  or  lees  reddish 9 

Antennte  wh(dly  black 10 

9. — Abdomen  with  yellow  bands obscurus 

Abdomen  velvet-like  black,  each  segment  with  a  tringular  black  shining  sjiot 

in  the  middle,  pnd  a  hoary  spot  on  each  side porcus 

10. — Abdomen  with  light  colored  bands Novae  Scotiae 

Abdomen  wholly  black modestua 

11. — Abdomen  elongate,  cylindrical  in  the  male 12 

Abdomen  oval ;  face  yellow 13 

12. — Hind  coxic  of  the  male  with  a  stout  process  below ohrysostomus 

Hind  coxiB  of  the  male  not  with  a  stout  process distinctuB 

13. — Dorsum  of  thorax  with  two  slender  obsolete  luteous  poUiuose  s'ripes  .  obaoletus 

Dorsum  with  distinct  light  colored  stripes 14 

f  integer 

14. — Abdomen  distinctly  banded <  ,.   . 

I  divisuB 

l?flavifacieB 

Third  segment,  except  a  small  opaque  spot  in  front,  and  the  fonrtb,  shining 

submetallic  black bilinearis 

EelopbiluB  bilinearis,  u.  sp. 

Habitat. — Colorado ! 

i .  Length,  9""".  Head  iu  profile  similar  to  that  of  H.  latun,  tho 
angle  of  the  cheeks  with  the  occiput  a  little  more  obtuse.  Face  yel- 
lowish white,  clothed  with  white  pollen  and  pile;  cheeks  shining  black. 
Antennae  reddish  yellow;  arista  luteous.  Lower  part  of  the  front  like 
the  face,  on  the  upper  part  brownish  black  with  black  pile;  the  pile  of 
the  vertex  light  colored.  Thorax  opaque  black ;  two  median,  remote, 
linear  stripes,  cinereous,  the  lateral  margins  ochraceous  cinereous; 
pile  yellowish  white.  Scutellum  obscurely  yellow,  the  narrow  base  an«l 
outer  angles  black ;  pile  wholly  light  <5olored.  Abdomen  elongate  oval, 
broadest  on  the  second  segment;  first  .segment  shining,  dust«d  on  the 


"I 


20f; 


HULLETIN   ai,    UNITED    STATES    NATIONAL    MUSEUM. 


Hides;  seuoud  Hegment  o  ^aque  black,  on  the  lateral  margins  an  elongate 
yellow  spot,  its  inner  margin  shining  beneath  cinereous  pollen  whicli 
extends  acutely  inward  near  the  middle;  third  segment  with  a  small 
hourglass-shaped  opaque  spot,  on  each  side  of  which  faintly  whitisli 
du,ste<l,  the  extreme  anterior  angles  luteous;  fourth  segment  luteous  on 
the  hind  border;  the  rather  broad  posterior  ])art  of  the  second,  and 
the  third  and  fourth,  shining,  somewhat  metallic,  black;  pile  on  tlic 
sides  in  front  long,  nearly  white,  elsewhere  shorter,  but  of  nearly  tlm 
same  color.  Legs  black,  hind  femora  on  outer  half  and  the  hind  tibi*, 
except  two  indefinite  darker  rings,  red;  tip  of  four  anterior  fenioni, 
their  tibiae  and  middle  tarsi,  luteous  yellow;  tip  of  front  tibiw  and  the 
front  tarsi,  brown.  Wings  cinereous  hyaline;  stigma  minutely  browu. 
One  specimen,  Colorado. 


k 


)l' 


i'i 


il 


CRIOllHIXA. 

Criorhlna  pictipes. 

CaUiprohola  pictipes  Higut,  Ann.  Soe.  Ent.  Fr.,  1833,  ']T^^. 
f  Criorhiiia  notata  (Wiedemann),  ante.  ji.  'il.'i. 
Habitat — Carolina  (Bigot). 

$  .  Long.  8  et  10""".  Antennis  testaceiH,  supernP.  et  apice  fiiavo  tinctis; 
palpisfiiscis;  facie,  fronte  conice  elomjata^flavo  pallido;  thorace^  scutello 
et  abdomine  niyro  (enencente,  fuivo  tntnentonis,  scaptilis,  vitta  thoraeiea  In- 
terali  manfinibusqtie  scutelli  ftdvin,  inciniiris  abdominis,  angnstissimc, 
macnlisque  dtiobus,  baiti.  ttubtriffonis,  fvlvis;  calyptriH  et  halteribus  palHdf 
favin  ;  femoribus  Jiaridis,  nigro  annulatis,  tihiis  anticisfHuciSj  haftijfavidis 
tarnis  antieis  i»fvscati.<i,  tibiis  intermediis  ^fiavis  tartiin  apice  fuscis,  tibiis 
poHticis  iinridix,  apice  hitc  fiisco  aniiidatis  ttiritis  fiaridis :  \nlis  hyaJiiiis] 
bani  et  c.vtri)iNcc7(s  Haridioribus,  rciiix  transremiti  pannn  iiifiiscatiH.  2. 
SimHlima;  frnnte,  mipernc,  late  nigra. 

3  .  Antennes  tesla(!(5es,  bruues  en  dessus  et  a  Vcxtrcmitc  du  3"  seg- 
ment, chete  testae*',  iiu,  a  pointe  brnnatre;  palpcs  brures;  face,  front, 
conique  et  iiotablement  saillaiit,  d'un  blanc  jauiuUre.  Enticrement 
d'un  noir  bronze  a  legers  reflets  (juivreux  et  duvet  fauvc.  fhincs.  sou.s 
les  ailes,  avec  une  forte  touffe  de  polls  Jaunatres:  thorax  A  partlv  de  l;i 
suture,  (^cusson,  hordes  de  fauve,  epaules  fauves,  nuHathorax,  soils  1V;cu.><- 
SO!!  d'un  noir  luisant,  2'  segment  abdominal  onie  en  dessus,  a  sa  base, 
de  deux  macules  preeque  trigonales,  along<?es,  fauves,  segments  tres 
finement  hordes  de  fauve,  I'abdomen  moins  tonuniteux  que  le  thorax : 
cuillerons  ct  balanciers  d'un  jaunatre  i)ale;  handles  noiratrcs,  pieds 
d'un  jaunatre  pale,  cuisses  avec  un  anneau  noir  vers  leur  extremitc, 
tibias  anterieura  k  I'extr6mit6  et  tarses  enti^-rement  bi-uns,  de  mcme 
que  les  tarses  post^rieurs,  tibias  posterieurs  largement  brunatres  a  leur 
extremity,  tibias  et  tarses  interm^diaires  d'un  jaunatre  pale,  ces  dernier.s 
noiratres  A  I'extremite;  ailes  d'un  jaunatre  fort  pale,  uu  pen  plus  fonce 
k  la  base  et  le  long  du  bord  externe,  nervures  transversales  l^gerement 
bordees  de  noirativ.      9 .  Semblable  an  male,  front  large  et  d'un  noir 


SYNOPSIS    OF    NOIMII    AMKUICAN    SYKIMIIDA:. 


29: 


aMt<ez  luisaiit  ii  8a  purtio  Hupdrieurc;  ciUMHes  po8t6rieui-eH  siinpleiuuut 
gamier  en  desHOUs  de  polls  fins,  pen  rigideM ;  2"  uervure  transverMalt^ 
de  I'alle  tr^s  l(jg^rement  oblique  ct  Hise  nil  milieu  de  cellule  discoldale. — 
2  sp6oiin. — Bigot,  I.  c. 

BRACHYPALPU8. 

BraohypalpuB  Amithaon. 

MiUtia  Amithaoy)  Walker,  LiMt,  etc.,  iii,  5G7. 
Habitat. — North  Caroliua  (Walker). 

"  8  .  Body  black,  shiuiug;  bead  as  broad  as  the  cbest,  clothed  with 
dark  tawny  hairs;  mouth  and  feelers  black:  eyes  brassy  black;  facets 
on  the  fore  part  of  the  crown  rather  larjjer  than  those  elsewhere;  chest 
clothed  with  dark  tawny  hairs;  abdomen  nearly  linear,  as  broa<l  as  the 
chest  and  much  longer;  sides  clothed  alternately  with  black  and  dark 
tawny  hairs;  logs  black,  clothed  with  black  hairs;  foot-cushions  and 
claws  dark  tawny;  tips  of  claws  black;  hind  thighs  very  thick,  toothed 
beneath;  hind  shanks  curved,  with  a  knob  on  the  inner  side;  wings 
dark  gray,  brown  along  the  fore  borders  and  on  the  sides  of  the  veins 
of  the  disk;  wing-ribs  and  veins  bUuik,  some  of  the  latter  ferruginous 
towanl  the  base;  poisers  ferruginous.  Length  of  the  body  7  lines;  of 
the  wings  15  lines."' — Walker,  1.  c. 

".1/.  Amithaon,  which  1  saw  in  the  British  museum,  looks  verj  much 
like  a  Brachypalpus.^ — Osten  Sacken,  Cat.  Dipt.,  251.  The  description 
reads  much  like  B.frontoaus,  except  the  "black  and  dark  tawny  hairs" 
of  the  abdomen.    Is  it  a  Crioprora  f 

Brachypalpus  Aepalius. 

Xijlota  Aepalina  Wnlker,  List,  etc.,  iii,  557, 

f  Brachypalpus  aorosia  VVilliston,  ante,  p.  223. 
I  neglected  to  compare  Walker's  description  in  describing  my  species, 
and  only  became  aware  of  the  apparent  identity  of  his  Aepalius  in  revis- 
ing the  description  for  insertion  here.  I  believe  they  are  the  same, 
though  the  description  is  not  very  definite  of  the  abdomen  and  i>ile  of 
the  thorax,  and  will  apply  equally  well  to  B.  pulcher. 

OBSERVATIONS    ON    THE    GENERA    AND    SPECIES    DESCRIBED    BY    MR. 

BIGOT. 

(Annales  et  Bulletin  Soc.  Ent.  de  France,  16S'.\,  84,  85). 

Phalacromyia  vicina,  Annales,  1883,  8<;.— Mexico. 
Phalacromyia  melauorhlna,  Annales,  1883,  86. — Mexico. 

This  genus  differs  from  Volucella  only  in  the  marginal  cell  of  the  wings 
being  open.    Mr.  Bigot  gives  a  useful  table  of  the  known  species  of  thi.s 
genus  and  of  Volticella. 
Microdon  gracile,  Annales,  1883,  321).  — Mexico. 

Is  not  this  the  same  as  M.  haliopterusf  The  descriptions  read  very 
much  alike. 


1 


il 


k 


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r 


I ' 


i 


29R  BULLETIN   31,    UNITED    STATES   NATIONAL   MLk^^oM. 

Miorodon  oothurnatum,  AnnnloH,  188.'},  320.— Oregon. 

1»  M.  trintiH,  var. 
Cbryiotoxum  vlllonulum,  AnnaloH,  1883,  32().— Oregon. 

I  make  thiH  a  N.viionyin  of  what  I  call  C.  derivatum  Walker,  bnt  it  is 
pos.sible  tliat  I  liave  included  more  llian  one  Hpecies  under  tbat  name. 
Ocyptamua  fratemus,  AiuiiiIi-m,  lS8:t,  :W4.— Mtxico. 

This  i«,  aceordinjj  to  the  author,  allied  to  O./unebrin  Macq.  Scbiuer 
(Nov.  E.\i)ed.,  .'i40),  was  not  able  to  decide  whether  thiti  species  diflfered 
Ironi  0.  foHcipennis  or  not.     liijjfot's  de.seription  of  the  wings  has  hardly 
anything;  in  conini(ui  with  the  latter. 
OcyptamuB  infuacatus,  Aniialt'H,  1H83,  324. — Mexico. 

Is  apparently  allied  to  O.  lathtttculus  Loew. 
OcyptamuB  rubrlventris,  Aniiales,  32.^>. — Muxioo. 

Appears  to  be  similar  to  O.  dimidintus  Fabr. 
Spazigaster  baccboldes,  AniiiilcH,  1883,  3'2U.— Californiu. 

This  is  the  same  as  Baccha  babista  Walker,  which  is  widely  distrib- 
uted over  the  whole  United  States.  The  author  places  it  in  this  ffenus 
on  account  of  the  oval  third  antennal  joint.  The  arista  is  not  plumoae. 
and  the  hiu<l  tibite  of  the  male  are  not  bent,  characters  that  are  given 
for  Spatigaater.  However,  I  have  never  seen  a  specimen  of  this  Eu- 
ropean genus,  and  cannot  give  any  opinion  as  to  the  justness  of  Mr. 
Bigoi's  determiuation. 

Ascia  nasuta,  AiiimlfN,  lri83,  327. — Mount  Hood. 
Ascia  quadrinotata,  Annuleu,  1883,  3*27. — Mount  Hood. 
Ascia  albipes,  Annalea,  1883,  328. — North  Americ  i. 

All  of  these,  I  believe,  are  only  varieties  of  the  common,  widespread 
Xeoascia  globosa  W'alker. 

Salpingogaster  anchorata,  Aunales,  1883,  328. — Mexico. 
Salpingogaater  cothurnata,  Auuales,  1883,  329. — Mexico. 

The  genus  Salpingogaster  Schiner  was  described  by  the  author  as 
follows  (Nov.  Exped.,  344): 

"Auss  der  (Jruppe  der  Syrphinen. — Kopf,  Tilickenschild  und  Hinter- 
leib  wie  bei  der  Gattung  Baclia,  nur  ist  der  letztere  immer  und  in  beideu 
Geschlechtern  an  der  Basis  sehr  diinn,  fast  drehruud,  vom  zweiten 
Kinge  an  aber  ungewohnlich  stark  verbreitet  und  flachgedriickt,  so 
dass  er  im  Umrisse  stark  keulenformig  erscheint ;  gegen  das  Ende  zu 
ist  er  sauft  zugespitzt;  die  Genitalien  des  MJinnchens  ragen  vor  und 
zeigen  bei  einer  Art  am  Ende  eineu  aufgebogenen  Dorn.  An  den 
ziemlich  langen  Beinen  sind  die  Hinterschenkel  in  der  Begel  gedornt, 
die  Domen  aber  klein;  Vordertarseu  des  Weibchens  breitgedriickt. 
Fliigel  gross;  die  Cubitalader  [third  longitudinal  vein]  ober  der  ersteu 
Hinterrandzelle  tief  buchtig  eingebogen  (eben  so  stark  wie  bei  Uris- 
talis),  der  letzte  Abschnitt  der  Discoidalader  (die  sogenannte  Spitzeu- 
({uerader  [last  section  of  the  fourth  vein]  sehr  stark  Sformig  gebogen; 
die  kleine  Querader  nahe  vor  der  Mitte  oder  auf  der  Mitte  der  Dis- 


yVNOPSIS    OF    NOKTII    AMERICAN    SYRPHIUiE. 


299 


Iti 


coidiil/t'llc  ziernlich  laii^;;  die  liudialzelle  [luorgiiml  cell]  ott'eii.    Typ- 
is<'li('  Art:  Salphigoffattter  pyg<tphora  Schiner." — South  Ainericu  (14  to 
iri"""  ill  h'linth). 
Doros  inaularis,  AiiiiuI*'m,  IHK),  :i30. — Cnbii. 

VVImtiuT  tliJH  is  ii  true  Doron  (i.  e.,  ditfering  from  Xanthogramma  in 
t\w  abdoiiH'ii  lii'iiig  (;hihl)cd,  ^.r  tliu  buHal  HeguientH  narrow)  or  not,  can- 
not lie  iiiiulc  out  tVoin  the  deNuription. 

Eristalis  opulentus,  AtinalrM,  IHKt,  ;<:<().— Cuba. 

The  speeies  liere  des(!ril»ed  appears  to  be  cloaely  allied  to  those  plneed 
\im\vv  I'feroptila  (riafiiocera). 

Sphixea  fulvifrons,  AnimluH,  ldd3,  841.— Georgia. 

Notwitiistaiidiiiji'  the  discrepancies  in  the  description,  there  can  be 
little  or  no  doubt  luit  that  this  is  the  widespread,  common,  and  easily 
recognized  Milesia  ornata. 

Lepidomyia  cincta,  Aniiak'H,  \^Q,\,  :)45. — Mexico. 

To  what  gi'iius  this  belongs  I  cannot  say.  The  author  was  in  uncer- 
tainty about  Lephlomyia,  for  which  he  had  grounds,  as  Loow's  very 
brief  diagnosis  does  not  convej'  a  very  good  idea  of  the  genus.  Bigot's 
species  is,  however,  evidently  no  Lepromyia.  The  pilosity  of  the  eyes 
and  the  light  color  of  the  scutellum  indicate  that  it  belongs  somewhere 
in  the  vicinity  of  (Jhiloaia. 

AsemosyrphuB  oouliferus,  AnnaltiH,  1883,  .350. — Mexico,  California. 
ABemosyrphuB  nigrosoutatus,  Annates,  1883,  351. — Mexico. 

The  latter  species  the  author  separated  on  unimportant  differences, 
and  thought  might  be  only  a  variety  of  A.  oculiferus,  a  view  in  which  I 
concur.  They  are  both  synonyms  of  Helophilus  Mexicanus,  which  will 
be  readily  enough  seen  by  comparing  the  description  with  male,  not 
female,  specimens. 

AsemoByrphuB  flavloaadatUB,  Annales,  1883,  351. — Mexico. 
ABemosyrphuB  bicolor.  Annates,  1883,  350. — Mexico. 

Whether  these  species  belong  to  a  genus  distinct  from  Helophilua  or 
not  1  cannot  say. 

Calliprobola  eexea,  Annates,  1883,  352. — Wasbiugton  Territory. 

Is  a  synonym  of  Brachypalpus  {Calliprobola)  pulcher. 
Calliprobola  calorhina,  Annates,  1883,  353.— Washington  Territory. 

There  is  scarcely  any  doubt  but  that  this  is  the  same  as  Sphecomyia 
Pattoni.  It  has  scarcely  anything  in  common  with  the  preceding  spe- 
cies. 

Calliprobola  piotipea,  Annates,  1883,  354. — Carolina. 
See  Criorhina  piotipea  above. 

Brachypalpus  Morrisonl,  Annates,  1683,  355.— Wasliington  Territory. 

This  is  my  Pocota  grandis,  described  first  as  Hadromyia  grandia. 
The  author  may  be  right  in  locating  it  under  Brachypalpua,  but  the 


1' 


ir 


'H.l 


4"\\ 


300  BULLETIN    31,    UNITED    STATES   NATIONAL    MUSEUM. 


n 


1 


very  broad  abdomeu  differs  much  from  that  of  the  type  of  that  genns. 
The  palpi,  moreover,  arc  elongate. 

RomaleosyrphuB  vllloBUS,  Annales,  1883,  35(i.— Mexico. 

This  genus,  of  which  this  is  the  type  species,  is  evidently  very  closely 
allied  to  Crioprora,  and  probably  identical.    The  only  part  of  the  gen 
eric  diagnosis  which  I  do  not  understand  is,  ^^ facie    *    •    supetne  vaUU' 

*  *  callosa."  The  face  hoiif^  of  the  species  known  to  me  h&n  a 
callosity  above,  without  the  slight  convexity  below  the  antenna?  is 
meant.  The  elongate  palpi,  the  conically  produced,  concave  in  i)ri»- 
file,  face,  the  antennae,  the  villosity,  and  the  structure  of  the  hind  legs 
throughout,  are  characteristic  of  Crioprora.  The  species  seems  to  be 
different  from  any  previously  described,  especially  distinctive  in  it^ 
large  size  (22"""). 

IschyrosyrphuB  tricolor,  Annales,  1884,  73. — C'uliforiiia. 

I  identify  this  as  Syrphus  velutinus.  The  genus  Ischyrosyrphm  is 
separated  from  Syrphus  solely  by  the  pilosity  of  the  eyes  and  is  wholly 
untenable.     See  remarks  under  Citahomha. 

Syrphus  perpallidus,  Aunahw,  1H84,  90. — North  America. 
Tins  is  the  very  common  Western  Eupeodes  volucris  O.  S. 

Mesograpta  ?  bicincta,  AnnalcH,  1884,  IV.i. — Mexic  ). 
MesograptP.  ?  biatriga,  Annales,  1884,  110. — Mexico. 
Mesograptii  f  circumdata,  Annales,  1884,  107. — Mexico. 
Mesograpta  f  cupriiia,  Annales,  1884,  114. — Cuba. 
Mesograpta  '  lieraldica,  Annales,  1884,  109. — Mexico. 
Mesograpta  ?  lacrymosa,  Annales,  1884,  108. — Mexico,  Brazil. 
Mesograpta  f  maculata,  Annales,  1884,  HI. — Mexico,  Cuba,  Brazil. 
Mesograpta  f  mu,  Annales,  1884,  105. — Mexico. 
Mesograpta  ?  pallipes,  Annales,  1884,  106. — Mexico. 
Mesograpta  ?  sapUiridiceps,  1884,  lO.'S. — Mexico. 
Mesograpta  T  trilobata,  Annales,  1884,  109. — Mexico. 

It  is  to  be  regretted  that  Mr.  Bigot  should  have  thought  fit  to 
describe  all  these  new  species,  while  not  sure  of  their  generic  location. 
He  must  certainly  have  misunderstood  the  genus,  as  its  distinctive 
character,  a  median  dorsal  cinereous  line,  is  usually  easily  apparent,  and 
dissipates  all  doubt  as  to  the  affinities  of  the  insects.  That  h'e  has  not 
rightly  conceived  the  limits  of  the  genus  seems  also  certain  from  the 
fact  that  he  has  described  species  from  New  Caledonia,  and  it  miiy 
safely  be  asserted  that  the  genus  is  distinctively  an  American  one. 
Other  reasons  make  this  addition  of  numerous  new  and  imperfectly 
described  or  doubtful  species  unfortunate.  Not  a  few  Syrphi  of  the 
older  authors  are  probably  Mesograpta;  but  whose  distinctive  characters 
cannot  be  made  out  till  the  widely  distributed  species  are  recognized 
from  South  America.  Again  there  is  a  great  variation  among  Individ 
uals,  and  single  or  even  a  few  specimens  are  often  insufficient  to 
decide  the  variational  limits.    Furthermore,  differences,  or  at  least  a 


t 


SYNOPSIS    OF    NORTH    AMERICAN    SYRPHIDiE. 


301 


utbular  synopsis,  should  have  been  given.  It  is  very  much  to  be  feared 
that  Mr.  Bigot's  long  interrogational  list  will  remain  an  incumbrance  to 
Mexican  dipterology. 

Mylolepta  lunulata,  Annales,  1884,  537.— Orejjon. 

Is  the  same  as  M.  varipes  Loew. 
Brachyopa  cinereovittata,  Annales,  1884,  537. 

This  seems  to  be  B.  raena,  but  the  description  of  the  thorax  does  not 
ajjree  well. 

Paragus  auricaudatus,  Annales,  1884,  540. — California. 

This  I  identify  with  the  common  European  P.  tibialis. 
Xylota  rubiginigaster,  AnnaleH,  1884,  543. — Colorado. 

I  have  immature  si)ecimen8  of  X,  pigra  to  which  this  description  will 
apply  fairly  well. 

Xylota  aHnulifera,  AnnalcB,  1884,  545. — North  America. 
I  do  not  see  wherein  this  species  differs  from  the  common  A'.  (juncieUi 

Say. 

Xylota  satanica,  Annales,  1884.  54(1. — California. 

This  description  applies  to  X.  curvipes  excejjt  that  the  bliick  of  the 
tip  of  the  hind  femora  is  not  mentioned.     Possibly  it  is  distinct. 

Glaurotricha  (Haurotricha)  volucelloides,  AnnaleH,  1884,  .548. — Mexico. 

The  author  is  in  doubt  whether  to  call  this  a  Glaurotrieha  or  a  Phal- 
aeromyia.  The  genus  corresponds  to  Temnoeera,  but  with  the  marginal 
cell  open  as  in  Phalacromyia. 

CartosyrphuB  lamprurus,  Annales,  1884,  552. — North  An)erica. 

This  is  evidently  Chilosia  eapillata  Loew. 
Cartosyrphus  hoodianus,  Annales,  1884,  552. — Monnt  Hood. 

See  Chilosia  hoodiensis  above. 

Cartosyrphus  mfumatus,  Annales,  1884,  55:1.— Monnt  Hood. 

Is  the  sama  as  Chilosia  nigripennis. 
Car'-osyrphus  laevis,  Annales,  1884,  .5.53. — Wasliin^ton  Territory. 

See  Chilosia  Uvris  above. 

The  genus  Cartosyrphus  was  characterized  by  tiie  author  as  follows: 
*•  Generis  Chilosia'  reteris  simHUmum  ;  dijf'crt.  vhcto  et  oviilis  glabris,^^ 

Melaiiogaster  rufipes,  Annales,  1884,  .555. — North  Aniericii. 

I  am  unable  tr  locate  this  species  any  more  delinitcly  tliiiii  the  author 
lias  done.  The  author's  conception  of  the  {ieiuis  will  be  ascertained  from 
the  following,  from  his  tabular  synopsis  of  the  genera  ol"  Syrpiiidte 
(Ann.  Soc.  Ent.  Fr.,  1883,  258)  : 

•'  Face  d(?pourvue  de  sillons  lateraux ;  antennes,  .'J*'  segment  de  grande 
dimension,  orbiculaire:  S  ,  yeux  contigus.  Carff^syrphns.  Id.,  $  ,  pour- 
vue  de  sillons  lateraux;  antennes,  3*  .segment  de  mediocre  dimension. 
Melanogaster.''^ 


h 


, 


tiH 


I,  i 


!|^   Jl 


302 


BULLPrriN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


I 


1 


It  will  tlius  be  seen  that,  in  tlie  ticoeptatiou  of  tbe  preseut  work,  this 
8pecie8  is  a  Chilosia.     His  descrii)tioii  is  as  follows: 

S  ,9  .  Long.  8""".  Nigra,  fere  nuda.  Facie,  thorave,  scutelloque  obscure 
cenesvcntibun,  parce  cinereo  rillosiiiis.  Antcnnarum  segmcntis  [secundis]  ct 
\ter1iis\,basi,  fulvo  obncuro  tinctis  ;  pedibun  anticis  fulvis,  femoribus  basi, 
tarnlH  apice,  nigrift,  poHtieix,  femoribns  fere  totix,  annulo  Hbiarum,  tursis 
totin,  cjusdem  coloris;  alls  hyalinitt. 

Noire,  clairseme  de  i)oils  {rrisatres.  Face,  thorax,  dcusson,  l*""  soy 
nient  de  I'abdomen,  luisants  avec  retlets  bronzes;  antennes  fjinve.s. 
uoiratres  h  la  base  aiusi  qu'au-dessus  du  3"  se}?inent;  face,  avec  des 
stries  obliques  tres  pen  visibles  de  cliaque  cote,  Idjierement  carcnee  ct 
tuberculee,  non  concave;  flancs  avec  un  pen  de  duvet  blanc;  cuilleroiis 
et  balanciers  blancs,  inassue  brune;  abdomen  d'un  iioir  opaque  avec  deux 
larges  macules  laterales  et  basilaires  d'un  fauve  obscur  sur  les  3"  et  4' 
segments;  pieds  fauves,  in  termed  iaires  et  anterienrs  avec  la  base  de.s 
cuisses  et  I'extrdmit^  des  tarses  noiratres,  posterieurs  avec  les  cuisses 
wresque  entierement  noiratres,  un  large  anneau  sur  les  tibias,  les  tarses 
ent'^rement  noiratres;  ailes  Lyalines,  la  macule  stigmatique  <^»troite. 
d'un  jaunatre  pale.  Antennes,  3**  segment  ovaloide  alloiige;  ailes,  5'" 
nervure  longitudinale  (Rondani)  conforme  comme  cbez  la  prec6dente 
esptice. — li  specim. 

The  "preeading  species"  {Chrysogaster  f  notata  from  Xew  Zealand) 
has  the  distal  section  of  the  fourth  vein  "oblique  apr^s  le  coade,  raais 
courb^  de  mani^re  Jl  former  un  angle  presque  droit,  bri^vement  appeii 
dicul^e  aprfes  le  coude."    Is  it  a  Melanostoma  ? 

Melanogaster  ochripes,  Aunales,  1884,  555. — Mouut  Hood. 

Is  a  synonym  of  Chilosia  par  va.    , 
Ortboneura  ainuosa,  Aunales,  1884,  .'^56. — Washington  Territory, 

Is  Chrysogaster  stigmata? 

Melanoctoma  cyaneocincta,  Annates,  1885,  251 . — Mexico. 
OcyptamuB  fenestratus,  Annates,  1885,  251. — Mexico. 
Eriatedis  rufoscutatuB,  Annates,  1880,  221. — Mexico. 


I::-! 

!    '^ 

304 


BIJL1,;^T1N    31,    UNITED    STATES   NATIONAL   MUSEUM. 


Hull.  :il.  n.  s. 


3a 


/CZ 


I'  U 


EXPLANATION  OF  PLATES, 
[All  the  flames  are  f'loiu  natuic,  by  the  author.j 

Pl.ATK  I. 

1.  MiCRonoN  I'uscn'KNNis  .MiR(|.,  1((,  hind  ley  of  male. 

2.  MiCKOi>ON  HALioPTKKfs  Loew  .',  head  of  male. 

3.  MiCKODON  TiusTlis  Loew,  will};;    :!((,  liiiul  lejj. 

4.  MicKoixiN  (ii.or.osrs  Kaln.,  head  of  male. 

5.  Ciiiivsoroxi  M   DKuiVATiM  Walker,  winj. ;  ."a,  head  of  male;  56,  hind  leg;  6eJ 

iiiirciiiin'  of  four  diU'cnMil  iidividnals. 

6.  ("llKYSoToXtM.  S|i.   (I'tHIKSCKNS?). 

7.  l*Ai!A<iis  mioi.oit  ral)r.,  head  of  female. 

8.  I'auauis  TiiiiAi.is  I'alleii,  lu!ad  »)f  female. 

9.  PAKA<iis  Hicor.oi:  Kiilir.,  wing. 
10.  Nausigastek  PUNCTiLATA  Will.,  male  J  lOo,  wing,  var. 


t  n 


Hull.  M.  V.  S.  Xhi.  Mum.— WilliHtiin,  Syiphidii'. 


PLATE  I. 


n. 


|:i 


Ki 


mi 


I , 


30G 


IJULLIOTIN    :!l,    UNllKli    STA'l  i:s    NATIONAL    MUSEUM. 


Bull.  31,  U.  S 


PLATE  n. 


II 
i 

i 


1.  Pn'iZA  I'lTLOHKM-A  Will.,  wing  :  In,  licail  of  l(>iniile;  W>,  hind  ley;. 

2.  PiPiZA  PisTiCA  Will.,  wing. 

3.  Pipizj*  prKi.i.A  Will.,  wing. 

4.  I'liM/A  I'KSTiVA  Mcigt'ii,  head  ot  rt'iiiiilc. 

5.  I'liM/A  <  isTi('oii>i';s  Will.,  itiittMiniv. 

6.  ('iii:v.s()(iAsri';i{  nKi.MM.A  Will.,  wing;  tW/,  liHiidol' Mit»l«  (the  convexity  of  the  fii^ 

is  ;i  lirtlc  loii  great). 

7.  (iiitYHOdA.sTKH  MTinA  VVietl  ,  wing;  7«,  head  of  male. 

8.  ('ni!Ys()<iA.»<TKi{  NUiifDViTTATA  Loew.  wing. 
8'f.  (!ii):vs()C}ASTKn  siKiMAPA  Will.,  head  of  male. 

9.  ('iiitYsor.AsiKi!  IM  i.ciiKM.A.  Will,,  head  of  male. 

10.  ('iiKYSKdAsiKis  Mdiiii'i.s  Loew,  head  of  male  ;  10a,  head  of  female ;  106,  wing.| 

11.  ruKYsoiiA.siKU  .NKmoviTiATA  l.oew,  head  of  female. 

12.  ('iii{Y.><i)<;astkk  si'KiM.viA  Will.,  wing. 

13.  CiiiLo.siA  PAiiVA  Will.,  head  of  female. 

14.  Ciiii.osiA  NiGRiPKN.Ni.s  Will.,  head  of  male. 

15.  CiiiLOSiA  PETiTLCA  Will.,  head  of  female  (the  Iowjt  border  of  the  cheeks 

Hcenda  too  jnnch  in  fi<mt). 


of  til*-  tiioi^ 


Bull.  31,  U.  S.  Kat.  Mu8.— WilUaton,  Syrpbidiu. 
,-    ■-  I 


PLATE  IL 


\^ 


6i 


^5^: 


,  iM       8i 


1 
t     [ 

i 


itvri  r 


II 


I . 


'    } 


14 


I  ::! 


308        BULLiiTiN  :n,  united  states  national  museum. 


PLATE  III. 


1.  Ciiii.oHiA  oc'oiUKNTAMS  Will.,  wiu){ ;  1(1,  h*>a<l  of  male. 

2.  ('IIM,(»SIA  r.ASIOI'HTIIAI.MA  Will.,  lifiul  of  limit'. 

3.  ClIII.OSI A  CYANKSl'KNS  LocW  ,   will);. 

4.  (CIIII.OHIA  IM.I'MATA  (»  v,\.\KM(;i:.\H)  Loijvv,  li*>a(l  of  fiiiiiile. 

5.  ("iiii.oMiA  TitisTis  Locw,  liciiil  of  iiijilt'  ( Wiisliiii^ton  Hjteoiinen). 

6.  [..KCro/oNA  i.i'cuiM'M  LiiiiK',  win^  ;  i'ui,  lifiiil  ot  iiiaU'. 

7.  Mklaxosto.ma  A.N(MSTAirM  Will.,  lieiiil  of  iiiiilc. 

8.  Mklanostoma  tioki.mm  ().  s.,  hciiil  "f  iiiah'. 

9.  Mki.ano.si'dma  mkmim'.m  Liiiiit!,  lita<l  of  mali-. 

10.  ri.ATYciiiifis  i^iADiiA  lis  S;iy,  Ifatl  of  iiial)' :   H)(/,  ii;{lit  front  tibia  and  taiHiin  n( 

male. 

11.  l*i.ArY<;mi,'i  >  iMiiiAiis  .Mtly.,  IkihI  nf  maji- ;   llo,  left  front  (iltia  ami  tarsus  o^ 

iiialc. 

12.  I'l.ATVCiiiiU'.s  iiYi'KKiioiiKi  s  Stat'^rtT.  ri};ht  front  tibia  aixl  tarHiis  of  male. 

13.  I'yuoimI/ENA  ooY.Ml  Fain-.,  aluloiiit-ii  of  female  ;  Hid,  rifjlit  front  tibia  and  taraii^ 

ofmalo;  I'M),  li'ft  middlt^  tibia  and  taiHUs  of  mule ;  I'.iv,  wing. 

14.  Kll'KonK.s  voi.t'CHls  O.  S.,  abdomen  of  mule  ;  14fl,  hypopygium. 


Hull.  11,  V.  S.  Niil.  Mum.  -Wllllatiin,  Syrpliiiliiv 


PLATE  m. 


Ii.:il 


i,^ 


\i 


310  lUJLLETIN    31,    UNITED    STATES    NATIONAL    MUSEUM. 


Bull.  31,  U.  S 


PLATE  IV. 


Jw' 


1.  Catabomha  pykastri  Liiinc^,  lu'ad  of  male,  from  in  front;  la,  head  of  femalf. 

2.  Syki'iius  Lksi:ki;iui  Macq.,  wing. 

3.  Sykphusgkmcl'latus  Mac(i.,  beadofmale. 

4.  DiDKA  i.axa  O.  S.,  wing;  4«,  head  of  male. 

5.  Mksoukai'ta  (iEMiNATA  Say,  head  of  male;  oa,  hind  leg  of  male. 

6.  Xantiiogramma  .txiUALi:  Loew,  head  of  female. 

7.  Haccha  aitiuxota  Walker,  wing. 

8.  Racciia  i-i'sciPENNis  Sa.v,  head  of  male;  Ha,  the  same,  front  view. 

9.  Haccha  Haiusta  Walk.,  head  of  female. 

10.  Nkoascia  oi.omKSA  Walk.,  wing;  lOfj,  head  of  male. 

11.  Si'iiKciNA  Kkkmana  Will.,  wing. 

12.  Si'iiKciiNA  i.\FL-,scATA  Loew,  wing;  12a,  head  of  male. 

13.  I'KLKi'OCEKA  Pekgkandei  Will.,  male. 

14.  Chaiaomvia  .khi;a  Loew,  head  of  male;  14a,  head  of  female. 

15.  Myiolepta  MGitA  Loew,  head  of  female. 

16.  Sph.kuopii(M{ia  cymndrica  Say,  head  of  male;  16a,  abdomen  of  male. 


Bull.  31,  U.  S.  Nat.  Mns.— WillUtoD,  Syrphidie. 


PLATE  IV. 


\  I 


x\\ 


I 


u! 


312  BULI.KTIN    31,    UNITED    STATES    NATIONAL   MUSEUM. 


PLATE  V. 


1.  Myiolkpta  vauipks  Loew,  win}-;;  1«,  h.inl  of  male;  16,  head  of  female. 

2.  Myiolepta  BELLA  Will.,  head  of  ft'iiialc ;  2a,  wing. 

3.  RiiiNGiA  NASiCA  Say,  head  of  male;  :^«,  wing. 

4.  EuGKNiAMY' \  KKUHUGiNKA  Fallen,  wing;  4a,  head  of  male;  4ft,  the  same,  front 

view. 

5.  HitACUYoPA  NOTAiA  O.  S.,  wiMf^;  ',a,  head  of  female. 

6.  Uhaihyopa  NOTAIA  O.  S.,  head  of  male. 

7.  iiUACiiYOPA  MKUiA  Will.,  head  of  feinahi. 

8.  VoLUC'KLLA  Hagii  .laMin.,  head  of  male. 

9.  VoLUCKLLA  OBKSA  Fabr.,  head  of  male. 
10.  Hacciia  DiMiDiATA  Fabr.,  wing,  female. 


•  !  i 


!  (^  \i 


me,  froti(a|,. 


I^iiU.  31,  V.  S.  Nat.  Mu8 Williston,  Syrphida). 

1 


'! 


«^ 

i 

- 

.    , 


I 


fej 


;»4 


314  BULLETIN    in,    l\lTi:i)    HTATK8    NATIONAL    ML'SLIM. 


I'LATE  VL 

1.  Voi,uc'Ki,LA  VKsKTi.osA  I'lihr.,  will};;  \(i,  liHiid  of  male. 

2.  V'OH;CKI,I,A  SKXIM'XOTATA  liOdW,   wing. 

V<»M(  KM.A  iTsiiXA  Mii((|.,  will};:  :!((,  head. 

Voi.UCKI.LA   I  ASCIATA   .Mj(l!(|.,   will}r, 

Voi.icKLLA  .MKXICANA  .Miicij..  will};;  iid,  liejul  of  male. 
V()M:ckm.a  k\  kcta  Wall<..  wiii};;  (i«.  liead  of  male. 
Vom:('i:(,la.  sp. 

8.  Voi.L'(  i:i.i,a  sp.,  lu'jKJ  of  male. 

9.  V<iLucKLi,A  CoMSTocKi  Will.,  lioad  of  iiialc. 

10.  Vom'(;klla  KiHiKNiA  Will.,  head  of  mah!. 

11.  VomcKIXA  SKX PUNCTATA  Loow. 

12.  VoLUCKiXA  SATVH  O.  S.,  wiiig  iiDiuatioii ;  V2h,  uutenns, 

13.  VoLUCKLi.A  TAT  Bi}'ot,  iiiiteiina. 


3. 
4. 
5. 
6. 
7. 


Bull,  ai,  U.  8.  N»l.  Muu.— VVllliHtuii,  HjlpUidiu. 

1 


PLATE  VI. 


.*  I, 


It 


316 


BULLETIN  M,   liNl  I'lOD  .STATI' 


«  NATIONAL  MUSK 


UM. 


1.    COPKSTVI.C 


M   MAli(il\ATIM  Sav, 


2.  Skhu'omyia  cii  \i.c()pv(iA  r. 


PLAI'K  VFI. 

iiiu:    Ui,  lu'ud  of  (Vtnalf;   ]h. 


3.  Si-: 


liiCOMYiA  Mii.iTAius  Walker. 


ofw,  \\in;i:  Uii.  head  (ifmali 


aiitciiiia. 


4.  Si:i{i( oMYiA  cninsoi 


OXOIDK.S  Mj 


will-:  :Ui.  Iliad  Icjrof  inalc:  ;U,.  hrad  of 


->.  Aiicioi'iiii.A  i-i-A(ii;A\s  O,  S. 


aiilciiiia  of  male;    1 


mail 
rt>  antenna  of  fenial( 


G.  Tr.rrnocxKMis  U 


7.   i:n 


xci'NTHs  Walk.. 


vvin.u:  :.«.  Iirad  of  male:  .-/i.  liind  jejrofi 


WMU 


IMAMS    ir.NA\    F.ii 


llie.    win;;;     7„.  l„.;,d    of  iriale:    7/- 


'/'.  antenna;  Tc,  hind  I.m.  of 


0.  r.tti 


sTAi.is  ti;a\s\  KHsrs  \V 


0".  EiiisTAiis  vi: 


ied..  liead  of  nial 


9.    IIUI.STALI 


KioitfM  Wied.,  liin<l  Iej;ofinali 


10.  !•: 


s  coMCACTf.s  Walker,  head  of  female. 


KisTAMs  iioKTOKi-M  Fahr  .  win- 


rwfiftr    r'»*tt*'^ 


1^        Hull.  :il,  U.  S.  Xat.  ilim.— Williston,  Syrpliidiu 

1 


it^i 


!  t 


318         BULLirriN  \n,  united  states  national  muskum. 


I' 


li 


U 


I'J.AIF,  VIII. 


1.  l'ri;i!(>rrir,A  ckimicikisa  \\  ii'd..  wiiif;;   !«,  distal  cmkI  of  iriali'  iil>(l(>mt!ii ;  Ifc,  hind 

li'u  lit' Ilia!*' :   If,  li(Md  of  male. 

2.  Ill  i.oi'iiii.rs  SIMM. IS  Macii.,  wiiifr. 

3.  Ili.i.oi'iiii.rs  (  <.N((si()Mrs  Will.,  head  of  fi-iiialc  :  ;irt,  wing. 

4.  KiJ.oiMiii.is  .M(ii>KsTis  Will.,  head  of  fciiiiilc. 

5.  1  III  oiMiii.rs  ciiiiVsosroMi's  Wi(!(l.,  liiiid  loKofmalc. 

6.  Ill  i.oriiii.r.s  i.i.ri's  Locw,  lu-ad  of  iiial<>. 

7.  Ili.i.oi'ini.us  Mi'.MCANr.s  MMf(|.,  head  of  iiiali' ;  7/),  the  ;miiie,  front  viow. 

8.  Doi.iosvuiMn  s  Rii.icvi  Will.,  huad  of  malt'. 

9.  l'ri;i{Ai,i.ASTi';s  TiioKACici's  Loow,  head  of  iiiah^ ;  [Ui,  hind  h^^' <•' ""*'♦'• 

11.  .Maij-oia  (.•imijiciiokmis  I'all.,  hind  leg  of  male  ;  ll«,  head  of  male. 

12.  rKiciiocxi'.Mis  i.rrnHATU.s  O.  S.,  lumi     t^"  of  male;  V2a,  winj.;. 

13.  Mai.i.ota  I'o.sticata  Kal»i-.,hiiid  lej;  of  male. 

14.  Mai. i.DiA  Sackkn'I  Will.,  wiiijj. 


v:t 


Ir! 


•Y\ 


i 


liiiU.  ;)l,  r.S.  Nat.  MiiH.— Willlslon,  Sjrpliiila-. 

1 


PLATE  VIII. 


;  U),  hind  W> 


ii 


320  BULLETIN  31.   UNITED  STATES  NATKJNAL  MUSEUM. 


2b 


PLATE  IX. 


1.  TnKtDONrA  cUHVn'K.s  Wiod.,  wiiij;;  Ik,  liciid  of  iiialc,  IVoiit  view;  16,  head  of 

male:  Ic,  hind  It';>  (tt'  ii^iih';   Irf,  hind  Ui^  of  f(Mnuh>. 

2.  TuoPIDlA  (/CADitATA  Sii.v.  wiiij;;  "Jd.  lit'iid  of  male;  'ih,  Iiind  loj;  of  male. 

3.  CiiioiuiiNA  ANAi.is  Mai  (|.,  will};. 

4.  (.'moiniiNA   iHMi;i!Ai.is  Will.,  wiiiji  ;   Jr/.  heal  of  mah'. 

5.  CuioKiiiNA  x(  mi.A  Will.,  head  of  male. 

6.  (;hiu1!111.\a  i.riMNA    Will.,  Icmalf  :  tl/i,  head   «{'   male.  tVoiit  view:   ()6,  the  same, 

Bide  view. 

7.  {Jmoitiii.NA  r.MiiiiAiiM.s  Will. 

8.  Mai.i.oia  riMiiicii'oH.Mis,  rcinii  ItAUirA.s  Walk.,  hind  lej;  of  male. 


\ 


:;iill.  .11,  U.  8.  Nat.  Mim.— WllllHt<in,  Syrphldii 

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23  WEST  MAIN  STREET 

WEBSTER,  N.Y.  14S80 

(716)  872-4S03 


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322  miLLETlN  'M,  UNITKI)  STATKS  NATIONAL  MUSKl'M. 


PLATE  X. 

1.  Criokhina  NIORIPE8,  Will.,  win-;  1«,  head  of  female  (tbi'  iniRle  oi  il...  ,.h,...k 

and  occiput  in  too  iiiulIi  rounded);  7h,  the  Hanm,  front  view. 

2.  CuiOKiriNA  VEimosA  IlarriH,  antcunu. 

3.  CitiouniNA  (SoMULA)  DEcouA  Mac(|,,  win-;  M,  head  of  male;  36,  the  same.side 

view. 

4.  Crioproka  cyanella  O.  S.,  wing  (  9  ) ;  4a,  hind  leg  of  male  ;  ib,  hind  le.r  of  f,- 

malc. 

5.  Crioproka  femorata  Will.,  head  of  male;  5a,  hind  leg  of  male. 

6.  Ckioprora  CYANEU.A  O.  S.,  head  of  female. 

7.  PocoTA  GRANDI8  Will.,  head  of  male ;  7a,  wing. 

8.  Brachypalpos  fbontosus  Loew,  hind  leg  of  male. 

9.  Brachypalpos  (Calliprobola)  pulchkr  Will.,  head  of  male,  9a,  hind  leg:  96 

wing.  ' 


ll'i 


f' 


Bull.  81.  TJ.  S.  N«t.  Mu8.— Willinton,  SyrphWae 

I 


PLATE  X. 


'f   - 


324         nri.r.KTiN  :n,  unitkd  stateh  national  museum 


Pr.ATE  XI. 

1.  SknogastrkComstocki  Will.,  iual<^;  1«,  win-;  16,  bead  of  mul.',  front  viow 

2.  Merapioidus  VILL08US  Bigot,  liead  of  feuialc;  2a,  win^. 

3.  Xylota  I'IGka  Fabr.,  win^. 

4.  EuMKnus  .SABur.ONUM  Fallon  (Europe),  wins;  4a,  bead  of  male. 

5.  Chuy.sociilamys  divks  O.  %  wing;  50,  bead  of  male. 

6.  Xyi.ota  FLAViTiiJiA  Bigot,  bind  leg  of  male. 

7.  Xylota  higra  Fabr.,  bind  leg  of  male ;  7a,  bead  of  m  le. 

8.  Xylota  kjuncida  Say,  wing ;  8a,  hind  leg  of  male. 

9.  Xylota  angustivkntris  Loew,  bead  of  male. 

10.  Brachypalpus  FRONT08U8  Loew,  head  of  male  (the  posterior  orbit  is  too  broad 
above). 


Bull.  11.  l^.  H.  Nat.  MuH.— WlIliHton,  Syrphldii-. 


PLATE  XL 


i  I 


.1 


326 


I'ULl.KTIN  31,  UNITJ:i»  .STATES  NATIONAI.  MUSEUM. 


I'' 


PLATE  XII. 

1.  SYKiMA  n.MKN8  Li.,u6,  win«;   1„,  hin.l  l.-g  „f  male;  16,  head  of  male;  1c.  .1,., 

Kanie,  Iroiii;  view. 

2.  Mii.KsiA  OUNATA  Fnbr.,  wiug;  2a,  biud  l.-jr. 

3.  Spilomvia  QUADHiKASciATA  Say,  head  of  malo. 

4.  Spilomyia  INTERUIPTA  Will.,  inal(\ 

5.  Si-iLOMYiA  KiTscA  L<,ew,  antenna  (the  third  joint  is  a  little  too  much  rounded). 

6.  Tkmnosto.ma  HO.MUYLAN8  Fubr.,  male. 

7.  Te.mnostoma  ALTKKNAN8  Loow,  head  of  female. 

8.  .Si'iiECOMYiA  Pattoni  Will.,  head  of  malo;  7a,  wiug. 


■'     '  ' 

'VI 


Hull.  .11,  n.  S.  X«t.  Ma*.-Wlllliitun,  Syrplihln. 


PLATB  Zn. 


I 


«! 


V,  ii 


SV>    •!'SI'-  <»F  NOIi'l'II    ,\M!;HI'AN  SYinMIID/K-Wiii  i- tos. 


K  U  U  A  T  A 

.\\\ii.  liiM    111  11  (tin  I  ottiiiii    till'   ii'l   tullinviiitt  lii('( ,  aiii|  iiiHcrt  I*'  ii( 

I  la  c    I  ;    i'wvA^if.  ^^*i  i.i' 
1  ;.   lihi  'jli    lipi  •i:iiir'  ri ml  In  luif. 

I.)    Iiii4  -^  liiiiii  I'liliiiiii,  l«ii  'V  sliiipfd    v<»i\  V-sliii|i(  il. 
1    ,    liiu     /     till'   'Imsi'    ri'ilil   I  nil-    line   1.'}  dcli'  llu'   cfiiti'lict    lr(;i»i. 

IlillU'     i  (nil 
.'!;'/,  liiH    l!i    )<ir  •Kiilwiinl    n  iiil  iiiwiini. 
4!>    I'lii   h   till.   •i'IcciiikIi':  lim  '^1  for 'liiml    r<  inl  froi.f 
t>l    liiifi  ficiin  liMllmii.  for  ■•^'r^^!^  iciid  iToli/.f:  iiiic'^l  from  l.ollom 

ili'li'  ''iliiiiilifi. 
(M     lii.t' 2:1    tor  'tilticit'  rt-iKJ  liliii. 
(iT     litn   !<  h'lini   liotloiii,   rtiiil  rilu'»<ii  fi'iii:i!«v    line  2^  troiii  ImMoin 


IMlll   <  ',  I  H 


I. lire. 


7  ;,   liii  ■  1-1.  iii.-i'rt  li.'i-''  of  I'l  loi't   'front. 

7.i    Inn   7    tor  ■tilth'  n-iiil    (nir;:i:   Ihh'  '*,    for  'iiiirrowl.v'  rciul  liu*. 

I'.'i.   Ii-ci  I'lic,  for  'I  (itir  ninl  I'll,    lin'  7  from  liottom.  ilflf  'wliitic'... 

V'!.   Iii:i   .'i    for    I'louii'  ri'iiii  U'Iio.n. 

!)i    liiT  I-     tor    hliick"  rtioi  n!  !(;•:'. 
I'V)     111  I-  l;.  tVom  i>otloiii    f  >.•    (ill  (  ii;k!i'  ii'IkI  lililiMli. 
102.   liiif  10.    Ii  Ic   '.>=.Hiili    Aiii(;ii;i   ( Siliim  r  V:   line  I »  rend  Doi-Kiiru 
of  tlio  ii.\  >i.ii!iiii.',   iiiclMlli       with  il.i.kiT  s:ii|)('s,  itf..  imd  .1 
till-  n.  x!  Ill-  li'icr-h  loi  'c  t  '  It  s-li. 
I(l4     line  II  from  holloiii,  insert  not  rf  fi  oci 


III 


11 


7  fr 


olll  lottoiii.  I 


Icll    •iliccUs  iilld 


120,   liiio  l>,  for  ''.viiijfr''  rciid  size     line  H,  for  ''.viii-s'  rciid  hody. 
I2ii.   liiif  1;'.  ;or  '-oiiii  vvhiit  in  tillic  lirowii'  r<  :id  innpliKli  liliick;  mm. 

ill.  tl  (•  I  ottoiti  of   (:,<•  )i;i].;f  Jidd:    I'.iirtliii    Iri^'ificlti  ififiot,  1.  « 

issi,  ;i;i;l.  \Vii,-.hiii}itoii. 
i;{0,   liio  S    for 'shilling'  niid  hronzo;   lim    1'^,  for  'Imsc'  rind  si' li-. 
17;},   liiK    21.    tor    •  fifth '    riiid    loiirlli:    line   2;i    for    '  bliii  k '   icjn 

ini'liillie, 
174     lliii-  Ii'.,  lor    (III  null  Kidt>,  lie.  niilcxd'pt  the  niiirgiii. 
1.S2    liiii'  1(1  from  lioiiom.  for  'hlii^li  iiwvn'  ri  iid  I  liie 
ili;».    liiif  12.  toi  'modi  r.iti'l.v'  iiad  mm  1.. 
213.   liiif  2.    for   'dusk-.'    mid  li.ulit;    i.eM    lim    li>i    'fjiftiiisl:'    rc»( 


Miiisli. 
iU,   lir.e   27.   for  'I'lii  iii.-^ 


h     ri'iid   I  liiish;    lust    liiii      insert    riietiillie 


I  efnie  Id.i.  k 
line  7  from  l.ettom.  for  'Idiiek 


d  !.ri,li/.e 


22!>.    line  Hi.  dele    exi  I'll    the  hind  iiiiiile:-';    ilii  i-iiiiii   eorri  etioii  for 

the  follouiiis;  ^  [lecii  .-< 
"Vi.   iirnt  line    for   (1  mm'  read  l(i  mm. 
244    I'.oti-,  for  'iiii>!!nl;iiir  reitd  sp  itled. 
t!')V   line  12  from  hottoni,  for  'nvo'   naiMoi-r. 


2''"2,   line  ITi,  for  'yelloiv'  rend  rid 

There  .■ire  11   fev    disireiiiiiieii  c  in 
erndi  eii:-e  l!:e  one  .civiii  in  the  Kxidiiiiati 
one. 


the  ri  l(  11  111  I    to  the  phitei-;   111 
of   I'liite-  ic  the  eorree: 


ir    rn.^ni 


-^  ■ 


^z- 


;f; 


■r.. 


N  l,^^ 


C  .J  1.11. 


I 


t    ..:' 


INDEX. 


Page. 

ierochordocodes 238 

vittatna 239 

illoprapta 96 

emarginata 93 

A'aota 97 

obliqna 96 

Aiicyclosyrphua 66 

AjihritiB 3 

auruleutaa U 

fulgeDB H 

cloboaus 4 

rufl.  88 12 

Arctophila  157 

flagMUis 1J8 

ABCitt Ill 

albipes 1 11 

globosa Ill 

metallioa  Ill 

nasnta Ill 

quadrinotata Ill 

Aseniosyrphus 183 

bicolor 299 

flaviscatatos 299 

nigroBcntatua 186 

ocnUfenia 186 

At  emnocera 134 

B. 

Baccba 116 

angusta  — 123 

•urinota 120 

BabiaU in 

capitata 124 

clayata 125 

oocbenilUvont 125 

cognata 122 

conformis 125 

coatata 122 

cnbenHis 125 

oylindrioa 125 

dimidiata 125 

elongata 123 

fasciata 125 

fascipennis 120 

fraterna 125 

fanebris 125 

fuscipennla 119 

infuscata 125 

latinscnla 122 

lemur I'^l 

lineata 125 


Pac«. 

Baceha  luctuosa 125 

lugens 118 

manuorata 125 

noUta 125 

nbscuricoruiH 123 

parricoruis 125 

ruflventria 125 

sciitoUata 126 

Tarobotias 117 

torvtt 124 

Baoha 116 

Bracbyrnyia 'J09 

liipiua 211 

iiigripea 210 

Brucbyopa 131 

ferruginea    131 

luedia 132 

notata 132 

vacua 133 

Brachypalpus 221 

npalius 297 

amitbaon 297 

cbrysitis 220 

cyanugaster 218 

frontosua 221 

Morrisonii 221 

parvus 222 

pulcher 223 

Rileyl 222 

sorosis 223 

verboaus 211 

C. 

CaUlprobola 244 

erea 223 

plctipes 298 

calorbina 258 

Camptoneura 31 

CartoayrphuB 38 

frontosas 46 

hoodianuB 292 

infumatua 44 

Invis 293 

lumprurus 43 

Catabumba 62 

pyraatri 63 

Cenogaster 184 

Ceiatophyft 8 

fuHcipenuis 4 

Ceria 259 

abbreviata 261 

arietis 265 

327 


i 


328 


INDEX. 


ii 


1'HJ{<". 

l'«i'iaDaphn«eus 2US 

LoewM •-!»• 

nigra t'dS 

nigripenniH '<  K3 

pedicellata 2tM 

pictula iSl 

ruflbaoiH 265 

8cut«llatB 265 

signifera 262 

anperba 284 

trideiiH 263 

( 'liHluomyia 126 

OBrpa 126 

Cheilosia 38 

Cli'lOBia 38 

ampla 285 

Baroui 40 

vapiUata  41! 

coniosa 44 

cyaneacenu 4"? 

frontosa 46 

h(«dien8i8 292 

lajvis 202 

laHio]ihthalma 40 

leucoparea 45 

luconiiu 62 

Ingubris 45 

uipripenuis 44 

occidontalis 41 

pallipes  41 

parva  45 

petulca 39 

plumata 42 

tristis 41 

verHipellis 44 

CUryaotoxuni 13 

dcrivatum 16 

flavifrons 17 

integre 10 

lateralo 14 

ni)!rita 17 

pubescens 15 

ventricognm 15 

villuHuliim 16 

ypHilon 14 

Chrysorhlainis 240 

Chry»oclilainy »  240 

bucCHta 242 

crcusim 241 

(lives > 241 

nigripuH 242 

CbryHogaster 31 

Antitheus 33 

Apisaon 291 

belliila 36 

bellulns 36 

lata 37 

latu8    37 

iiigripett 33 

nigrovittnta 34 

nitida 35 

nitidus 35 

pictipeunls 37 

))ul<'he11u 35 


P«ge. 

Chrygc  ;a8ter  Htigmata ^^ 

MigliiatUB ;|^ 

I  Cbymophila  nplendens ij 

I  CnemiMlon ;i.^ 

I  ConopH  ffncus    ig| 

fuscan 100 

I                 gemmatus jn- 

pipiens 240 

praciuctus c2 

vulgaris loo 

Cope»tylum            ifii 

Uuvlventrls 151 

leutuiu 15J 

I                       limbipeuuis 152 

!                       marginatum 151 

<'i'l'riiirt i:i9 

'                  pijiiins 240 

('riojjiora    217 

ulnpez 220 

cy  aaella 218 

cyanogastor 218 

femornta 219 

Cricii'hina 209 

analig 214 

armillata 213 

deoon 210 

hnmeralis 214 

intersistens 212 

Inpina 211 

nigra 214 

nigripcs 2i0 

notata 21.') 

pictipes 286 

scitula    21;'' 

umbrutilis "^12 

verbosa 'Vi  I 

Cryptineura ;)l 

liieroglypbica '.'.i 

Cynorbina 209, 212 

D. 

Dfisymyi '. '2'X 

Didea (9 

aU'idice 08 

fasciata ^9 

I'uscipeM 89 

laxa 90 

DiniuraspiH  3 

podagra 4 

Doliosyrplius 178 

birtipes 179 

Rileyi 178 

seutollatua 179 

Doroa  at-qualis !"> 

Balyras -'0 

flavipos •'■* 

insularis -'•'■^ 

E. 

Elopbilus l»' 

tenax 1«0 

Enica «'• 

Epistropbo  conjungens  •*" 

Ki  iophora 209 


INDEX. 


329 


Page. 

jrjstalinnH 168 

Erinlali" 158 

leneas 161 

agrorum 177 

Blbiceps 172 

albifrong 177 

Antlroclus 165, 198 

atriceps 169 

atrinianus 173 

basilaris '78 

RaHiardi 168 

liellardi 177 

lirouHi 165 

chalopua 198 

obal}'beu8 162 

cbry8ontomn8 190 

cimbiciforniifi 202 

coactas  .  201 

compactiiH 169 

ciibensis 177 

cnprovittatus 161 

ilecisuH 189 

dimidiatus 162 

diminutuB 178 

evpres 178 

expictus 178 

faniiliaris 178 

fi;niiirntuB 178 

HuvipeH 168,  202 

frati^r 198 

fill  vipes 178 

t'urcatua  178 

tiiiadalapensis 178 

(luudlachi 178 

hirtus 162 

hortorum 173 

iinpositas 178 

InciaaraliH 162 

inflatus 178 

inflexuH 162 

inoruatns 175 

intersiHtens 212 

lateralis 178 

latifrunn 164 

L'Horinineerii 162 

luuoniiii . 62 

Mcigenii 165 

mclanoHtomuH 168,202 

mexiKikDiis 178 

niontaniiH 166 

DebuloiiiiH 168 

nigcr 162 

obHciiruH 175 

occidentaliH 167 

oestrifiirmia 176 

opiilentus 183 

paob ypoda   178 

part'DH 177 

pervagus 163 

pbiladclpblcus 170 

piloHna 174 

pnmilus 170 

pinguls 182 

posticatus 201,  204 

pratorum 183 

piiRin  178 


Paca 

£ri8tali8  rafo8cat4itiu 802 

Sackenis 178 

Baxornm 163 

aeniicirculna 178 

semimetallicuc 168 

soniculaa 172 

sincerua 161 

SnuloaqnnDFis 178 

atipator 164 

temporalis 162 

tenax 160 

tcHtaoelcurnia 178 

tlioracictia 171 

traiiHverHuH 170 

tricolor 178 

trifasc.atua 171 

iioiculor 178 

iivaniiii 171 

riuntoriiiu 171 

vit'itus 170 

/.(M.ltUH 170 

Eriatalon.via 1,18 

Euceratomj'ia no 

Pergandci 110 

Eiigeuiimyia 130 

t'erriigiiR-a IHI 

riifa i:ii 

EumeruH  porcua    197 

privernua 102 

Enpeodea 04 

volucria 05 

Earhiniyia IH3 

Eurliinamallota 209 

lupina 211 

metalhca ".'11 

nigripea '.'10 

Exochila 131 

F. 

Ferdinandea 240 

G. 

Glaarotricha  yolucelloidea 301 

H. 

Hadromyia 220 

graL,di8 221 

Eeliophilus 224 

HelopbiliiR  183 

Anauais 193 

Androvlus  ....   198 

albicepa 206 

ai  cticua 185 

bilinearis 295 

borealia 185 

chalepua !08 

cbryaoHtoraus 190 

couo^to;nu8  193 

diatinctns 192 

divisna 195 

faaciatua 189 

flavifaciea    ..   197 

t'ornialia 198 

frater 108 

glaciali.H 184 

groenlatidicua 185 


330 


INDEX. 


ii 


1 


4'M 


Helophilus  bamntUB lUi 

integer 195 

189 

188 

193 

186 

192 

197 

196 

196 


HeriiiKia . 


IffitUS 

Utifrona 

lineatus 

mexicanuB 

luodfstus 

Novaj  Scotia) 

obscurus 

obnoletua 

polygrammua 186 

porcua 197 

similia 189 

atipatua 193 

aiiaurraim 180 

22 


ImatiHma 

poatioatA 

iHchyroayrphus 

tricolor . 


Lepiilorayia . 


pyraatri 


calopna 
cincta . . 


Lepruniyia . 


Leucozona  . 


calopus  . 


luoomm. 


MelanoHtoma. 


. .      -JOI 

•-'01,  JU-J 

«« 

73 


L. 

LaaiopIiticuH 62, 66 

64 

31 

31 

299 

81 

31 

61 

62  i 


M. 

HaUota 201 

atrox 202 

l)arda 201 

Bmitias 202 

liipartitH 205 

cimbUjlfonnis ;iO'J 

dentipoB 202 

niilestformls 180 

poaticata 201. 202, 204 

Sackeni 204 

Melanoj^asti^r  ocbripea 45 

niflpea 801 

46 

60 

54 

54 

53 


anguatatuin 

anthraooidoa  

annulifemm 

bicmciata 

bicruciatam 53 

eoBrnlescens 49 

ornciatum 54 

oyaneocincta 302 

graciliB 60 

roaciilosa 

iiipllina..  

nu-Uinuui 

ubHuiira 

obBcunim 

pachytaraia 

pictipea 


50 

49 

49 

48 

48 

54 

52 

priiinnaa 49, 62 


Mtjluioatoma  pnilnosnm .,• 

quadrinotatum j.  I 

roBtrata -A 

roatratum .^,.1 

ruflpea ,jj 

Bcalaria 4,,  ^1 

tigrina .  ,, 

tigriuuDi ,- 

trichopus -,, 

MelitbruptuB iq, 

pictua iQj 

acriptua jq^ 

Merapioidua 343 

Pergandei hq 

Tilloans J43 

Merodon  balanua .jq] 

barduH ^ji 

Bautias juj 

bipartitUB 205 

curvipes 'job 

MeHugramma q^ 

geminata uy< 

parvula gg 

planiTeiitria 100 

Meaograpta gg 

auchorata 104 

arcifera 104 

aurulenta 102 

baailaria 104 

biatriga 300 

bicinta 300 

Boaoii 103 

oircamdata 300 

coaleacens 294 

corbia  ...  2M 

uupriDU 300 

eotypim    104 

^I'lninata lOi 

lieraldica 300 

lacinioaa 104 

lacrymuaa SCO 

linearis lot 

macnlata UW 

marninata 100 

niinuta 104 

mu 300 

multipoDctata 104 

pallipea 300 

parvula 99 

poecilogaatra 104 

polita 98 

pulchftlla 104 

aanbiridicepa .'-00 

aubannulata 104 

trilobuta 300 

variabilis 104 

Mesophila 

fuacipenniB ( 

Mioraptoiiia 2*^4 

Microdon    I 

Agapenor 4 

aurit'ex 9 

aumlentus U 

balioptjrua 5 

coarctatua ' 


INDEX. 


331 


Page 

Kicrodon  cotbumatum 6 

cothurnatus 8 

eaglosaoides 11 

falcatns 0 

fulgcus 11 

IbsripeoniB 4 

glol>U8US 4 

graoilU 12 

intequallB 12 

l«3tU8 12 

limbos 8 

niarmorutum 10 

miinnoratiis 10 

pactiysty  lum 8 

pulcber 5 

ruflcrus 7 

rutipaa 12 

scituluB 10 

tristis 6 

trncbilus 9 

MUeeia  254 

acuta 180 

amitbaoo 297 

aualis 214 

ania 182 

Bacuntius 200 

baida 168,201 

bombylans 250 

crucigera 180 

Dxcentricu 251 

hicniatodes 227 

ifjnava 231 

linibipennls 255 

iieiuonim   231 

notata 215 

ornata 255 

pigra 227 

pipiens 240 

quadrata 283 

ruflcrus 181 

verbosa 211 

virginiensis 255 

Zetterstedtii 250 

Mixogaster    283 

mezicanus 283 

Mixti'Diyia 244 

cpbippium 249 

quadrifasciata 248 

Mu)io  aui'ulentua    11 

blcolor 18 

globogus ! 

nigrita ■  < 

IkluBca  cincta 182 

lappona 154 

lucornm 02 

nioUina 49 

pipicDH 240 

porclna 160 

pyraetri 63 

ribesii 77 

ro8» 63 

soripta K' 

Burinaffltinsis 173 

tenaz 160 

tomentoaa 211 


PagB. 

MuBca  virginienBia 255 

My  iob'pta 127 

»rca 126 

bella 128 

cioereo-vittata 133 

I                     luunlata    128 

nigra 124 

Btrigilata 127 

varipcH li:? 

N. 

NauHigastor  21 

piinctnlata 21 

Neoascia lU 

nlblpoA U" 

diHtinctu 112 

globomi Ill 

UHitallicii 112 

natiuta 112 

quadrinotata 112 

O. 

OcyptamuB 1 16 

confomiig 110, 125 

diniidiatuB 125 

fascipenniB UO 

fratemua 125 

fenoatratUB 302 

funobria 125 

fascipeunia  119 

infuacatua 125 

latiuaculua 122 

longlVL-ntris 119 

mflvontria 125 

Ornidia 134 

obeaa 143 

Orthoneura 31 

bieroglj-pbica 35 

nigroTittata 34 

uilida 35 

pictipenuia 37 

ainuoaa 34 

uatulata 83 

P. 

ParaguB 17 

leueua 19,85 

albipea 20 

anguatifrona 17 

arcuatua 18 

auricaudatua 20 

blcolor 18 

coadiinatua 20 

diniidiatua 20 

diapar 20 

fomoratua 19 

ha'morrhouB 19 

nigritia 20 

(ibHcuriia 19 

punctiilatua 18 

quadiil'asfiatun 248 

ruflcauda 18 

aigillatua 19 

txniatua. 18 

t«8taccus 18 

tiblalia 19 

triangalifema 19 


332 


indp:x. 


ii 


Pelecooera 110 

latlfronH llo 

Pergamlel 110 

HCOiVoidCH    110 

tricincta Uo 

Peulum '22 

Phalucromyia  inolanoiiiina '201 

vicina 297 

Wpi/.a 22 

all)i|)il(i8a '.'98 

artuiiiiH 27 

liiicoata     110 

ralcaratu 24 

L'ra8Hi]ii>R    291 

(llvisa    29 

femurnliH 26 

feativa 27 

t'rau<liili>iita    20 

Innata 27 

iniiilofita    24 

ui'jribarlm     25 

nit{ri|iil()sa 28 

(imata 27 

piHtai'oidtH 29 

pixtica 20 

piibc'BceDS 23 

piiella 27 

piilvbdla 29 

ra(li(Him 26 

salax 25 

tibialis 10 

Pipizella 22 

Plagiocera 179 

ci  icigcra 180 

Platycbcirus.' 56 

ocy  ni  i 55 

poltatUB 58 

PlatychiniH 50 

cbivtiinoduR 50 

cillatus 60 

by  porborpiis 57 

iinniarfiinatua   50 

Nasd 61 

Pacilus 61 

poltatu« 58 

(Itindratua 57 

sc.inibus 50 

PixDta    220 

alopt'x 220 

ryani'lla 218 

prandis    221 

I'olydonta 205 

bioolor 206 

nirvipes 206 

Hriomcnis 178 

Psarusornatus i!57 

qiiadnl'asclatns 248 

Pwilnto 30 

buccata 30,291 

liafidipennis 30 

Pt.i  iillastPs 108 

littiratas 200 

tlioracicus     198 

Pteroptila 179 

uiucta 182 


1',.-,. 

Pteroptila  vruclgera ,,. 

dt'cora ,  „. 

(ipulouta .„.. 

pratonim ■(,„ 

nitirriiH  ,g. 

?•   iiata    ]g, 

Pviopha'ua J 

ocynii 55 

roHanun .5 

It. 

Khiimia y,^ 

lorinniuoa jjq 

luiHlca 130 

Roninlooayipbaa  villoRUB 3(jq 

S. 

SaliiiDKoguBtor .19^ 

ancliorata  — jgjj 

cotbiirnata -MtB 

Scaiva Bu 

abliiflviata hi 

aftiuis    (j4 

albiniana .-,u 

ai'cuata eg 

diniidiata i'j5 

cDiai'i^iiiata 93 

tiemiiiata m-j 

liypei'borea rj 

luppouica (Mj 

liiubata gg 

luai'ginata 1  no 

lupUiua 49 

obli(|iia 90 

ocy  mi ."),"> 

poltata r>8 

polita n« 

pyrastri 64 

<|iiadnitii 57 

libt'HJi    77 

rosaniin 55 

scalaiis 49 

8ii:;^ta 107 

topiaria 79 

transfucii    (54 

Sonognster 238 

coBriiI('«(^t>n8 239 

Comstocki 239 

Seric'oniya %.  ..  153 

Sericomyla 153 

bifasoiata 154 

cbaU'opyga 156 

cliiysotoxoide8  157 

alia 157 

lapiiona 154 

liinbipeniiiB 157 

iiiilitaris 155 

soxfasciata 155 

Soniula 209.216 

docora 210 

Spati;:a8ter  bacxboides '17 

Spbi'coinyia -56 

hrevicornis 258 

Pattonl 258 

vtdpiformis -57 

vittata 2.5T 


\  [; 


1 


INDEX. 


333 


Page. 

SphfCina •  13 

Infiiacata 114 

Eoeniann 1 1:< 

lobnta 115 

ruflvi-ntrig 114 

Sphierophoria 104 

Ba<chi(ln8 »B 

contifHia lur> 

cyliudrica 106 

(labia  108 

fulvicftuda 109 

bieroglyphica  109 

InfumBU 109 

lueDthastri 109 

iiielani)8a 1C6 

micnira 107 

uaituta 109 

pacli.vpyga 109 

pitta 1U9 

picticauda 109 

p.vrrhina 108 

acripta 107 

Htiigata 109 

Hiilphuripes 106 

Sphixra 254 

falvifroDH 255 

Sphiximorpba  259 

Spilomyia 244 

bnmbylans 250 

<>phippium 249 

fuHca 246 

baiuifera 247 

interrupta 246 

I  it.urata 245 

loDgicorois 245 

piillipi'g  249 

pleuralis 247 

quadrifuHCiata 248 

Syrif  t  a 239 

pipiens 240 

mexicana 240 

SyrphUB 66 

abbreviatus 81 

osneus 161 

affiniH 64 

agiliH 88 

agnoii 68 

agrornm 177 

arcnatua  68 

lapponicusbipnnetatus...  69 

lapponicua 69 

adolcHceua 71 

amalopiH 69 

americanna 82 

Amiaaaa 119 

anchoratus 104 

Alcidico 68 

Antiphatea 88 

urcuatus 68 

aroucinctua 68, 69 

baeilaria 104 

bicolor  18 

bombylana 250 

Boacii 103 

cimbiciformia 202 


Pne«v 

Sy iphtia  ciurtolliia 78 

cingulut  ulua 08 

clavatua 125 

coali-HCt'DH 294 

I'orbix 204 

colludc^DH 88 

con  t  Umax 71 

corollii' 82 

oylindricuB 128 

deliueatua 88 

diHji^ctUH 72 

dixjiiurtag 72 

diinidiutua 125, 294 

ditiicuHua 96 

diversipoa 76 

«cty|)iiH 104 

oiiiaiginatua 03 

CHurii'UH 137 

fU|iflliitn»   88 

«!XCl8U8  ...'. 81 

fiiiiii]H'nuia '.'93 

fiiscanipeDoia fi? 

geminatua 102 

geuiculatna Hi 

goDualia  86 

grauilitaraus 55 

r  dBiilaDdicas 185 

UtirgKg 103 

guttatug 85 

liccticiiH  98 

boi'tornm 173 

hypcrboreaa 57 

infiiinatua 109 

intRrrogana 102 

intrudeng 70 

iria 49 

jactator 88 

lappona 154 

lapponicua 68 

LeHiieiirii 80 

linibatus 88 

limbi  ventria 294 

lobatug 55 

lotua 75 

lucorum 62 

macutifrona 88 

luacnloaua 50 

marginatua 100 

mellinua 49 

melliturgna 49 

inelarlua 49 

mentalia  72 

miniituH ^ 104 

niutuua 88 

Xaso 61 

nigripeg 89 

nigrita 17 

Doctiliicua   53 

obegiig 143 

obliquiia 06 

o.bHturua 48 

ochrogtoma 293 

orynii 55 

OBBtriformig 176 

opiuator 83 


334 


INDEX. 


>r' 


1 


ByrphiiA  paciluH 61 

panxlllns 74 

perpallitlan flS 

pelUtiiB 68 

pbllndelphlon^ 77 

pictuH ..  10ft 

pifter '<J'.'7 

piDgnin 1S2 

pipiens 240 

politus 08 

praturum 183 

prwDRtuH t>ft 

profuHas 216 

protritas 77 

pulchellns 1 04 

pyrMtii  63 

quMlratna ■17 

quadrifaacUtnfi f*0 

quinqnvliiubittii  < >*' 

Qulntlim 100 

rodaca 11» 

radiatus -.  «» 

rectos —  77 

ribeaii "7 

roMmm 55 

scalariB 49 

Mcarifems 96 

aexguttatus 85 

■criptns 107 

aignatns 96 

•implex 87 

■teKona 89 

•odalis 74 

anlphnripes IOC 

taraatna 294 

tenax 160 

topiarlns 79 

tonrna 79 

tranaftigas 63 

trichopas 51 

trifasciataa 355 

yelntiniu 73 

veaicnloauft 141 

Tioetonim 171 

nmbellatamin 85 

nnicolor 63 

xanthoatomns 80 

T. 

Tcmnocera 134 

megacephala 146 

pabemsens 140 

pnrpnnwMiu 148 

aetigera 147 

nnileota 150 

viridultt 150 

Temnoatoma 249 

seqaale , 253 

teqnalia 253 

alternana 252 

Balyraa  * 250 

bombylans 250 

excentrica 251,263 

excentricnm 251 

obscara  260 


Temniwtoniii  pictuliim    i)-. 

veniiKtum jjj 

TvuibOGncfnia |gj, 

ISacnntiaa qq 

litaratua jqq 

ToxotnorQH ^ 

f^eminatns igj 

notatua jo.^ 

TriRlypbiiH  rabileatua y 

piiheRcena ■<:{ 

Ti'iiidoDta MQn 

curripea •^na 

Tropitlla '_>(k- 

albiatylnm 0,17 

oalcai-ata juh 

mamlUnta 2O8 

qnadrata 207 

Tv/.fiiliuuHia lib 

vt'N|iifonnia 'jst 


U. 


Obrist*') 


V. 


Vdlucella 134 

ubdnminaliK 150 

Anna    y.m 

ametbyaliDa 150 


•perta. . . 
apicaJiH  . 

avida 

asnrea  . . 
oaatanea  , 


150 

m 

139 

143 

ISO 

chBtopbora UO 

cbalybeaoena.  150 

Comstooki 138 

dlapar 137 

pRnrienn 137 

mexicuna 137 

engenia 139 

eveota 136 

faoialia  137 

faHciata 145 

fnlvioomia ISO 

HagU 147 

iaabellina 140 

lappona 154 

laU 150 

marginata 151 

MaximUiani 137 

niega«epbala 146 

mellea 160 

metailifera 137 

mesioana 137 

nlgrifaciea 150 

obewk 143 

picto. ISO 

plnmatu 136 

postioata 150 

pnbeacena 148 

pnlcbripea 150 

pnrpnraaoena 148 

pnrpnrifera 150 

pneilla 144 

aatur 142 

scxpanctata W 


i  r 


INDEX. 


335 


Page. 

Tolucellatau 148 

tibUlia 180 

tiioinoto ISO 

trlatU ISO 

nnileoU ISO 

vaiiegkUk ISO 

varUni 150 

vesiooloaa 141 

Tlotoria 145 

violaoea 160 

Tiridnia ISO 

X. 

laothogrunma 01 

nqnalia M 

dlTlaa 02 

emargliiata 03 

fellx    01 

flavipes 04 

lylota 224 

npalias 207 

analU 226 

aufnistlTentria 231 

annnlifera 229 

arooata 288 

Antbreas 235 

badia 212 

barbata 238 

Baton 229 

bicolor 229 

bUlMoiata 231 

ehalybea 288 


Pac*. 

Xylotu  roloradouilH 280 

orauipea . ,  227 

cnrvlpea 232 

t'jDDcida 229 

eloDgata 234 

flbdfroDs 234 

flavltibla 22g 

femorata 232 

fraadaloaa 230 

heinatodea 2*27 

llbo 220 

marginalia TM 

metalllca 235 

metallifera 236 

nemomm 231 

notba 228 

nlgripes 231 

obsonra 233 

paob}     ara 237 

pigra 227 

pipiena 240 

pretioaa 237 

proxinia «. 240 

qnadrata 207 

qnadrimaonlata 229 

aatanica 232 

anbooatalia 238 

aabfaaolata 230 

veoora 233 

tnberana 225 

Xylot^a 127 


J\ 


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